As filed with the Securities Exchange Commission on December 22, 1998
                                                      Registration No. 333-_____
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM S-8
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933

                               OSI SYSTEMS, INC.
             (Exact Name of Registrant as Specified in its Charter)

           California                                   33-0238801
(State or Other Jurisdiction of                       (I.R.S. Employer
Incorporation or Organization)                        Identification No.)
 
                             12525 Chadron Avenue,
                              Hawthorne, CA 90250
                    (Address of Principal Executive Offices)

                 OSI SYSTEMS, INC. EMPLOYEE STOCK PURCHASE PLAN
                            (Full Title of the Plan)

                                 Deepak Chopra
          Chairman of the Board, President and Chief Executive Officer
                               OSI Systems, Inc.
                              12525 Chadron Avenue
                              Hawthorne, CA 90250
                    (Name and Address of Agent for Service)
                                 (310) 978-0516
         (Telephone Number, Including Area Code, of Agent for Service)

                                   COPIES TO:
                            Gerald M. Chizever, Esq.
                             Lance Jon Kimmel, Esq.
                  Richman, Lawrence, Mann, Chizever & Phillips
                            9601 Wilshire Boulevard
                                   Penthouse
                            Beverly Hills, CA 90210
                                 (310) 274-8300

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                        CALCULATION OF REGISTRATION FEE
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Proposed Proposed Title of Maximum Maximum Securities to be Amount to be Offering Price Aggregate Amount of registered(1) Registered(1) Per Share(2) Offering Price(2) Registration Fee(3) - ------------------- ----------------- ----------------- ----------------- ------------------- Common Stock, 200,000 shares $7.00 $1,400,000 $389.20 no par value =====================================================================================================
(1) Pursuant to Rule 416(a), also covers additional securities that may be offered as a result of stock splits, stock dividends or similar transactions. (2) Estimated solely for purposes of determining the registration fee. (3) Calculated pursuant to Rule 457(a) and Rule 457(c), based upon the average of the high and low prices of the Common Stock on the Nasdaq National Market on December 16, 1998, which was $7.00. INTRODUCTION This Registration Statement on Form S-8 is filed by OSI Systems, Inc., a California corporation (the "Company" or the "Registrant"), relating to 200,000 shares of its Common Stock, no par value (the "Common Stock"), issuable to eligible employees of the Company and its subsidiaries under the OSI Systems, Inc. Employee Stock Purchase Plan (the "Plan"). PART I INFORMATION REQUIRED IN SECTION 10(a) PROSPECTUS Item 1. Plan Information. ---------------- Not filed as part of this Registration Statement pursuant to Note to Part 1 of Form S-8. Item 2. Registrant Information and Employee Plan Annual Information. ----------------------------------------------------------- Not filed as part of this Registration Statement pursuant to Note to Part 1 of Form S-8. 2 PART II INFORMATION REQUIRED IN THE REGISTRATION STATEMENT Item 3. Incorporation of Documents by Reference. --------------------------------------- The following documents, which previously have been filed by the Company with the Securities and Exchange Commission (the "Commission"), are incorporated herein by reference and made a part hereof: (i) The Company's latest Annual Report on Form 10-K for the fiscal year ended June 30, 1998; (ii) All other reports filed pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (the "Exchange Act") since the end of the fiscal year covered by the Annual Report referred to in (i) above; and (iii) The description of the Company's Common Stock contained in the Company's Registration Statement on Form S-1 (Registration No. 333-29179), filed with the Commission on June 13, 1997, including any amendment or report filed for the purpose of updating such description. All reports and other documents filed by the Company pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of this Registration Statement and prior to the filing of a post-effective amendment hereto, which indicates that all securities offered hereunder have been sold or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference herein and to be a part hereof from the date of filing of such documents. For purposes of this Registration Statement, any document or any statement contained in a document incorporated or deemed to be incorporated herein by reference shall be deemed to be modified or superseded to the extent that a subsequently filed document or a statement contained therein or in any other subsequently filed document which also is or is deemed to be incorporated herein by reference modifies or supersedes such document or such statement in such document. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement. Item 4. Description of Securities. ------------------------- Not applicable. Item 5. Interests of Named Experts and Counsel. -------------------------------------- Not applicable. II-1 Item 6. Indemnification of Directors and Officers. ----------------------------------------- The Company's Articles of Incorporation (the "Articles") provide that, pursuant to the California Corporations Code, the liability of the directors of the Company for monetary damages shall be eliminated to the fullest extent permissible under California law. This is intended to eliminate the personal liability of a director for monetary damages in an action brought by, or in the right of, the Company for breach of a director's duties to the Company or its shareholders. This provision in the Articles does not eliminate the directors' fiduciary duty and does not apply to certain liabilities: (i) for acts or omissions that involve intentional misconduct or a knowing and culpable violation of law; (ii) for acts or omissions that a director believes to be contrary to the best interest of the Company or its shareholders or that involve the absence of good faith on the part of the director; (iii) for any transaction from which a director derived an improper personal benefit; (iv) for acts or omissions that show a reckless disregard for the director's duty to the Company or its shareholders in circumstances in which the director was aware, or should have been aware, in the ordinary course of performing a director's duties, of a risk of serious injury to the Company or its shareholders; (v) for acts or omissions that constitute an unexcused pattern of inattention that amounts to an abdication of the director's duty to the Company or its shareholders; (vi) with respect to certain transactions or the approval of transactions in which a director has a material financial interest; and (vii) expressly imposed by statute for approval of certain improper distributions to shareholders or certain loans or guarantees. This provision also does not limit or eliminate the rights of the Company or any shareholder to seek non-monetary relief such as an injunction or rescission in the event of a breach of a director's duty of care. The Company's Amended and Restated Bylaws require the Company to indemnify its officers and directors under certain circumstances. Among other things, the Bylaws require the Company to indemnify directors and officers against certain liabilities that may arise by reason of their status or service as directors and officers and allows the Company to advance their expenses incurred as a result of any proceeding against them as to which they could be indemnified. Section 317 of the California Corporations Code ("Section 317") provides that a California corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or proceeding, whether civil, criminal, administrative or investigative (other than action by or in the right of the corporation) by reason of the fact that he is or was a director, officer, employee or agent of the corporation or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation or enterprise, against expenses, judgments, fines and amounts paid in settlement actually and reasonably incurred by him in connection with such action or proceeding if he acted in good faith and in a manner he reasonably believed to be in or not opposed to the best interest of the corporation, and, with respect to any criminal action or proceeding, had no cause to believe his conduct was unlawful. Section 317 also provides that a California corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its II-2 favor by reason of the fact that such person acted in any of the capacities set forth above, against expenses actually and reasonably incurred by him in connection with the defense or settlement of such action or suit if he acted under similar standards, except that no indemnification may be made in respect to any claim, issue or matter as to which such persons shall have been adjudged to be liable to the corporation unless and only to the extent that the court in which such action or suit was brought shall determine that despite the adjudication of liability, such person is fairly and reasonably entitled to be indemnified for such expenses which the court shall deem proper. Section 317 provides further that to the extent a director or officer of a California corporation has been successful in the defense of any action, suit or proceeding referred to in the previous paragraphs or in the defense of any claim, issue or matter therein, he shall be indemnified against expenses actually and reasonably incurred by him in connection therewith; that indemnification authorized by Section 317 shall not be deemed exclusive of any other rights to which the indemnified party may be entitled; and that the corporation may purchase and maintain insurance on behalf of a director or officer of the corporation against any liability asserted against him or incurred by him in any such capacity or arising out of his status as such whether or not the corporation would have the power to indemnify him against such liabilities under Section 317. In May 1994, the Company entered into indemnification agreements with Deepak Chopra, Ajay Mehra and Thomas K. Hickman in connection with certain personal guarantees provided by them to a Singapore financial institution that provided a loan to OSI Singapore, a subsidiary of the Company. The indemnification agreements provide that the Company shall indemnify Messrs. Chopra, Mehra and Hickman against all debts, liabilities, damages, claims, expenses and costs including attorneys' fees incurred by them in connection with OSI Singapore's inability to fulfill its obligations under the loan and their respective guarantees of such loan. Messrs. Chopra, Mehra and Hickman are directors and/or executive officers of the Company. In connection with certain settlements entered into pursuant to consent agreements, the Company's subsidiary, UDT Sensors, agreed to pay the United States government a total of $1,500,000 in five annual installments ending on March 31, 1999. In order to ensure the full payment, Deepak Chopra personally guaranteed the payment of $750,000 of the foregoing amount. The Company entered into an indemnification agreement with Mr. Chopra pursuant to which the Company shall indemnify Mr. Chopra against all debts, liabilities, damages, claims, expenses and costs including attorneys' fees incurred by him in connection with his guarantee of the payment of $750,000. In addition, the Company entered into indemnity agreements ("Indemnity Agreement(s)") with each of its directors and executive officers prior to the consummation of the offering of the Company's Common Stock covered by its Registration Statement on Form S-1 (Registration No. 333-29179), filed with the Commission on June 13, 1997, as subsequently amended (the "S-1 Registration Statement"). Each such Indemnity Agreement (the form of which is incorporated by reference to Exhibit 10.10 to Amendment No. 2 to the S-1 Registration Statement, filed with the Commission on August 15, 1997) provides II-3 that the Company shall indemnify the indemnitee against expenses, including reasonable attorneys' fees, judgements, penalties, fines and amounts paid in settlement actually and reasonably incurred by him in connection with any civil or criminal action or administrative proceeding arising out of the performance of his duties as a director or officer. Such indemnification is available if the indemnitee acted in good faith and in a manner he reasonably believed to be in or not opposed to the best interests of the Company, and, with respect to any criminal action, had no reasonable cause to believe his conduct was unlawful. Each Indemnity Agreement permits the director or officer that is party thereto to bring suit to seek recovery of amounts due under the Indemnity Agreement and to recover the expenses of such a suit if he is successful. The Underwriting Agreement filed as Exhibit 1.1 to the S-1 Registration Statement provides for indemnification by the underwriters of the Company and its officers and directors for certain liabilities arising under the Securities Act of 1933, as amended (the "Securities Act"), or otherwise. The Company has been advised that it is the position of the Commission that insofar as the foregoing provisions may be invoked to disclaim liability for damages arising under the Securities Act, the provision is against public policy as expressed in the Securities Act and is therefore unenforceable. Such limitation of liability also does not affect the availability of equitable remedies such as injunctive relief or rescission. Item 7. Exemption from Registration Claimed. ----------------------------------- Not applicable. Item 8. Exhibits. -------- Unless otherwise indicated below as being incorporated by reference to another filing of the Company with the Commission, each of the following exhibits is filed herewith:
Exhibit Number Exhibit Description - ------- ------------------- 4.1 OSI Systems, Inc. Employee Stock Purchase Plan. 5.1 Legal Opinion of Richman, Lawrence, Mann, Chizever & Phillips. 23.1 Consent of Richman, Lawrence, Mann, Chizever & Phillips (contained in Exhibit 5.1). 23.2 Consent of Deloitte & Touche LLP (independent auditors). 24 Power of Attorney (contained on signature page hereto).
Item 9. Undertakings. ------------- (a) The undersigned Registrant hereby undertakes: II-4 (1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement: (i) To include any prospectus required by section 10(a)(3) of the Securities Act; (ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post- effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high and of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20 percent change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective registration statement; (iii) To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement; provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in periodic reports filed by the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in this registration statement. (2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. (3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering. (b) The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Securities Exchange Act) that is incorporated by reference in the Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. (c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue. II-5 SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Hawthorne, State of California, this 17th day of December, 1998. OSI SYSTEMS, INC. By: /s/ Deepak Chopra --------------------------------------- Deepak Chopra, Chairman of the Board, President and Chief Executive Officer Each person whose signature appears below constitutes and appoints Deepak Chopra and Ajay Mehra, and each of them, his true and lawful attorneys-in-fact and agents, each with full power of substitution and resubstitution, severally, for him and in his name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement, and to file the same, with all exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated.
Signature Title Date - ----------------- --------------------------------- ----------------- /s/ Deepak Chopra Chairman of the Board, December 17, 1998 - ------------------ President and Chief Executive Deepak Chopra Officer (Principal Executive Officer) /s/ Ajay Mehra Vice President, Chief Financial December 17, 1998 - ------------------ Officer (Principal Financial and Ajay Mehra Accounting Officer), Secretary and Director /s/ Steven C. Good Director December 17, 1998 - ------------------ Steven C. Good /s/ Meyer Luskin Director December 17, 1998 - ------------------ Meyer Luskin /s/ Madan G. Syal Director December 17, 1998 - ------------------ Madan G. Syal
II-6 EXHIBIT INDEX
Exhibit Number Exhibit Description - ------- --------------------------------------------------------------------- 4.1 OSI Systems, Inc. Employee Stock Purchase Plan. 5.1 Legal opinion of Richman, Lawrence, Mann, Chizever & Phillips. 23.1 Consent of Richman, Lawrence, Mann, Chizever & Phillips (contained in Exhibit 5.1). 23.2 Consent of Deloitte & Touche LLP (independent auditors). 24 Power of Attorney (contained on signature page hereto).

 
                                                                     EXHIBIT 4.1
 
                               OSI SYSTEMS, INC.
 
                         EMPLOYEE STOCK PURCHASE PLAN
 
  1. Establishment of the Plan; Purpose. This Employee Stock Purchase Plan
(the "Plan") was established to provide Eligible Employees with an opportunity
through regular payroll deductions to purchase Common Stock of OSI Systems,
Inc., a California corporation, so that they may increase their proprietary
interest in OSI Systems, Inc. The Plan was adopted by the Board of Directors
of OSI Systems, Inc. on August 6, 1998. The Plan is intended to qualify as an
"employee stock purchase plan" under Section 423 of the Internal Revenue Code
("qualified employee stock purchase plan").
 
  2. Definitions.  As used herein, the following definitions shall apply:
 
  (a) "Board of Directors" means the Committee if one has been appointed, or
the Board of Directors of OSI Systems, Inc. if no Committee has been
appointed.
 
  (b) "Code" means the Internal Revenue Code of 1986, as amended.
 
  (c) "Committee" means the committee appointed by the Board of Directors of
OSI Systems, Inc. to administer the Plan in accordance with Section 3 below,
if one is appointed.
 
  (d) "Company" means (i) OSI Systems, Inc., (ii) each of the existing
Subsidiaries, as defined in Section 425 of the Code, of OSI Systems, Inc. that
are incorporated in the United States, and (iii) any such other or future
Subsidiaries as the Board of Directors of OSI Systems, Inc. shall from time to
time designate. Until the Board of Directors of OSI System, Inc. determines
otherwise, the term "Company" shall not refer to or include any Subsidiary
incorporated outside of the United States.
 
  (e) "Compensation" means the annual base rate of pay of a Participant as of
the first day of an Offering Period, determined in accordance with
nondiscriminatory rules adopted by the Board of Directors, including
commissions, but excluding bonuses, income with respect to stock options or
other stock purchases, moving expense reimbursements, shift differentials or
any pay for work outside the regular work schedule.
 
  (f) "Eligible Employee" means any regular employee of the Company whose date
of hire was at least six (6) months prior to the commencement of an Offering
Period, who is customarily employed for at least 20 hours per week and more
than five (5) months in any calendar year.
 
  (g) "Fair Market Value" of a share of Stock means the value of a share as
determined by the Board of Directors.
 
  (h) "Offering Date" means the first day of each Offering Period.
 
  (i) "Offering Period" means, in the absence of a specific determination to
the contrary by the Board of Directors or the Committee, the six (6) month
period beginning on January 1 and July 1 of each year, but in no event shall
an Offering Period exceed twenty-four (24) months.
 
  (j) "Option" means the right of a Participant to purchase Stock during the
applicable Offering Period.
 
  (k) "Participant" mean an Eligible Employee who elects to participate in the
Plan.
 
  (l) "Plan Account" means the account established for each Participant
pursuant to the Plan.
 
  (m) "Purchase Price" means the price at which Participants may purchase
Stock as determined pursuant to the Plan.
 
                                       1


 
  (n) "Stock" means the Common Stock of OSI Systems, Inc.
 
  (o) "Subsidiary" means a corporation a majority of whose voting shares are
owned by OSI Systems, Inc.
 
  3. Administration. The Plan shall be administered by the Board of Directors
and/or by a duly appointed Committee consisting of not less than three
persons, at least one of which shall be a member of the Board of Directors,
and having such powers as shall be specified by the Board. The Board of
Directors may from time to time remove members from, or add members to, the
Committee. Vacancies on the Committee shall be filled by the Board of
Directors. The Committee shall select one of its members as Chairman, and
shall hold meetings at such times and places as it may determine. The
interpretation and construction by the Board of Directors or the Committee of
any provision of the Plan or of any right to purchase Stock shall be
conclusive and binding on all persons.
 
  4. Number of Shares to be Offered. The aggregate number of shares reserved
for issuance under the Plan shall be 200,000 shares of Stock, subject to
adjustment as provided in Section 8 hereof. In the event that any Option
granted under the Plan expires or is terminated for any reason, such shares
allocable to the unexercised portion of such Option shall again be subject to
an Option under the Plan.
 
  5. Eligibility and Participation.
 
  (a) Initial Participation. An Eligible Employee shall become a Participant
on the Offering Date after satisfying the eligibility requirements by
delivering to the Company's payroll office an enrollment form authorizing
payroll deductions not less than ten (10) business days prior to such Offering
Date. An Eligible Employee who did not enroll in the Plan prior to the
Offering Date, or a person who becomes an Eligible Employee after an Offering
Date, may enroll in the Plan for the next Offering Period as of the beginning
of the next Offering Period by completing and filing an enrollment form prior
to the commencement date of such Offering Period.
 
  (b) Continued Participation. A Participant shall automatically participate
in each successive Offering Period until such time as such Participant
withdraws from the Plan as set forth below. A Participant is not required to
file any additional enrollment forms for subsequent Offering Periods in order
to continue participation in the Plan.
 
  (c) Payroll Deduction Rate. The Participant shall designate on the
enrollment form the percentage of Compensation which he or she elects to have
withheld for the purchase of Stock, which may be any whole percentage from 1%
to 10% of the Participant's Compensation. A Participant may reduce (but not
increase) the rate of payroll withholding during an Offering Period by filing
an amended enrollment form with the Committee at any time prior to the last
day of any Offering Period (for which such change is to be effective), but not
more than three (3) changes may be made in any Offering Period (or such other
number of changes as may be approved by the Board or the Committee). A
Participant may increase or decrease the rate of payroll deduction for any
subsequent Offering Period by filing with the Company a new authorization for
payroll deductions not less than ten (10) days prior to the Offering Date for
such subsequent Offering Period.
 
  By enrolling in the Plan, a Participant shall be deemed to have elected to
purchase the maximum number of whole shares of Stock which can be purchased
with the amount of the Participant's Compensation which is withheld during the
Offering Period; provided, however, that with respect to any Offering Period
no Participant may purchase shares of Stock in excess of the amount permitted
under Section 9.
 
  (d) Preconditions to Options. Any Options granted pursuant to the Plan shall
be subject to the Company obtaining all necessary governmental approvals
and/or qualifications of the sale and/or issuance of Options and/or Stock.
 
                                       2

 
  (e) Purchase Price. The Purchase Price for, each share of Stock to be
purchased under the Plan shall be eighty-five percent (85%) of the Fair Market
Value of such share on either (i) the Offering Date or (ii) the last day of
each Offering Period, whichever is less.
 
  (f) Contributions. The Purchase Price of the Stock shall be accumulated by
payroll deductions throughout the Offering Period, which shall be applied
automatically to purchase Stock at the end of each Offering Period. In the
absence of a contrary determination prior to the commencement of an Offering
Period, each Offering Period shall have a six-month duration. At the end of
each Offering Period, accrued payroll deductions will be automatically applied
to the purchase of Stock at the Purchase Price as hereinabove defined. Payroll
deductions shall commence on the first payday following the Offering Date and
shall continue to the end of the Offering Period unless sooner altered or
terminated as provided in the Plan.
 
  (g) Effect of Leave of Absence. During a leave of absence approved by the
Company, a Participant may, for such period as the Committee shall deem
reasonable, continue contributions to the Plan by making cash payments to the
Company on his normal paydays in an amount equal to the difference between the
amount of his regular payroll deductions taken while such employee was
participating under the Plan and the amount of his payroll deductions taken
while on such leave of absence. Failure to pay any installment within ten (10)
days after the payday on which it is due shall be treated as a withdrawal from
the Plan.
 
  (h) Purchase of Stock. The Company will maintain a Plan Account on its books
in the name of each Participant. On each payday the amount deducted from the
Participant's Compensation will be credited to the Participant's Plan Account.
No interest shall accrue on any such payroll deductions. As of the last day of
each Offering Period the amount then in the Participant's Plan Account will
be, divided by the Purchase Price and the amount in the Participant's Plan
Account shall be used to purchase the number of whole shares of Stock which
result. Stock certificates representing the number of shares of Stock so
purchased shall be issued and delivered to the Participant as soon as
reasonably practicable after the close of each Offering Period. Any amount
remaining in the Participant's Plan Account at the end of an Offering Period
after deducting the amount of the Purchase Price for the number of whole
Shares issued to the Participant shall be refunded to the Participant, without
interest.
 
  (i) Withdrawal. A Participant may elect to withdraw from participation in
the Plan at any time up to the last day of an Offering Period by filing the
prescribed, form with the Committee. At the time of withdrawal the amount
credited to the Participant's Plan Account will be refunded in cash, without
interest. Upon withdrawal from the Plan, the accumulated payroll deductions
shall be returned to the withdrawn Participant and the withdrawn Participant's
interest in the Plan shall terminate. In the event a Participant voluntarily
elects to withdraw from the Plan, such Participant may not resume
participation in the Plan until after the expiration of one complete Offering
Period; re-enrollment shall be made in the same manner as set forth above for
initial participation in the Plan.
 
  (j) Pro Rata Allocation. In the event that the aggregate number of shares
which all Participants elect to purchase during an Offering Period shall
exceed the number of shares remaining available for issuance under the Plan,
the number of shares to which each Participant shall become entitled shall be
determined by multiplying the number of shares available for issuance, by a
fraction, the numerator of which is the sum of the number of shares the
Participant has elected to purchase and the denominator of which is the sum of
the number of shares which all Participants have elected to purchase.
 
  6. Effect of Termination of Employment. Termination of a Participant's
employment for any reason, including retirement or death, or the failure of a
Participant to remain an Eligible Employee shall be treated as a withdrawal
under the Plan. In the event of the Participant's death, a refund of the
Participant's Plan Account shall be paid, without interest, to the
representative of the Participant's estate.
 
  7. Rights Not Transferable. The rights or interests of any Participant in
the Plan, in any Option granted under the Plan, or in any Stock or moneys to
which he or she may be entitled under the Plan, shall not be
 
                                       3

 
transferable by voluntary or involuntary assignment or by operation of law, or
by any other manner otherwise than by will or the applicable laws of descent
and distribution. During Participant's lifetime, any Option of such
Participant may be exercised only by him or her. If the Participant shall in
any manner attempt to transfer, assign or otherwise encumber his or her rights
or interests under the Plan, other than by will, such act shall be treated as
a withdrawal from the Plan.
 
  8. Recapitalization, Etc. Subject to any required action by the shareholders
of the Company, the number of shares of Stock covered by each Option under the
Plan which has not yet been exercised and the number of shares of Stock which
have been authorized for issuance under the Plan but have not yet been placed
under an option (collectively, the "Reserves"), as well as the price per share
of Stock covered by each option under the Plan which has not yet been
exercised, shall be proportionately adjusted for any increase or decrease in
the number of issued shares of stock resulting from a stock split, reverse
stock split, stock dividend, combination or reclassification of Stock, or any
other increase or decrease in the number of shares of Stock effected without
receipt of consideration by the Company; provided, however, that conversion of
any convertible securities of the Company shall not be deemed to have been
effected without receipt of consideration. Such adjustment shall be made by
the Board, whose determination in that respect shall be final, binding and
conclusive. Except as expressly provided herein, no issuance by the Company of
shares of capital stock of any class shall affect, and no adjustment by reason
thereof shall be made with respect to, the number or price of shares of Stock
subject to an Option.
 
  In the event of a proposed dissolution or liquidation of the Company, the
Offering Period will terminate immediately prior to the consummation of such
proposed action, unless otherwise provided by the Board. In the event of a
proposed sale of all or substantially all of the assets of the Company, or the
merger of the Company with or into another corporation, each Option under the
Plan shall be assumed or an equivalent option shall be substituted by such
successor corporation, unless the Board determines, in the exercise of its
sole discretion and in lieu of such assumption or substitution, that the
Participant shall have the right to exercise the Option as to all of the
optioned Stock, including shares as to which the option would not otherwise be
exercisable. If the Board makes an option fully exercisable in lieu of
assumption or substitution in the event of a merger or sale of assets, the
Board shall notify the Participant that the Option shall be fully exercisable
for a period of thirty (30) days from the date of such notice, and the Option
will terminate upon the expiration of such period.
 
  The Board may also, if it so determines in the exercise of its sole
discretion, make provision for adjusting the Reserves, as well as the price
per share of Stock covered by each outstanding Option, in the event that the
Company effects one or more reorganizations, recapitalizations, rights
offerings or other increases or reductions of shares of its outstanding Stock,
and in the event of the Company being consolidated with or merged into any
other corporation.
 
  9. Limitation on Stock Ownership. Notwithstanding any provision herein to
the contrary, no Participant shall be granted a right to purchase Stock
pursuant to Section 5 if such Participant, immediately after electing to
purchase such Stock, would own Stock possessing five percent (5%) or more of
the total combined voting power or value of all classes of stock of OSI
Systems, Inc. or any parent or Subsidiary of OSI Systems, Inc., or (ii) if
under the terms of the Plan the rights of the employee to purchase Stock under
this and all other qualified employee stock purchase plans of OSI Systems,
Inc. or its Subsidiaries would accrue at a rate that exceeds $25,000 of fair
market value of such Stock (determined at the time such right is granted) for
each calendar year for which such right is outstanding at any time. For
purposes of this Section 9, ownership of Stock shall be determined by the
attribution rules of Section 424(d) of the Code and Participants shall be
considered to own any Stock which they have a right or option to purchase
under this or any other plan.
 
  10. Rights as an Employee. Nothing in the Plan shall be construed to give
any Participant the right to remain in the employ of the Company or a
Subsidiary or to affect the right of the Company and its Subsidiaries or the
Participant to terminate such employment at any time with or without cause.
 
                                       4

 
  11. Rights as a Shareholder. A Participant shall have no rights as a
shareholder with respect to any shares of Stock he or she may have a right to
purchase under the Plan until the date of issuance of a stock certificate to
such Participant for shares issued pursuant to the Plan. The Company shall
provide its financial statements to each Participant at least annually.
 
  12. Amendment or Termination of the Plan. The Board of Directors shall have
the right to amend, modify or terminate the Plan at any time without notice,
provided that no Participant's existing rights are adversely affected thereby,
and provided further that no amendment to the Plan shall be effective until
such amendment is approved by a vote of the holders of at least a majority of
the outstanding shares of Common Stock of the Company within twelve month
before or after the date upon which such action is taken by the Board of
Directors, if such amendment would:
 
  (a) Increase the aggregate number of shares of Stock to be issued under the
Plan (except as provided in Section 8 hereof);
 
  (b) Materially modify the requirements for eligibility to participate in the
Plan;
 
  (c) Increase the maximum number of shares of Stock which a Participant may
purchase in any Offering Period;
 
  (d) Extend the term of the Plan;
 
  (e) Alter the Purchase Price formula so as to reduce the price for shares of
Stock to be purchased under the Plan;
 
  (f) otherwise materially increase the benefits accruing. to Participants
under the Plan; or
 
  (g) Cause the Plan to fail to meet the requirements of an "employee stock
purchase plan" under Section 423 of the Code.
 
  The Plan shall terminate on the date prior to the tenth anniversary of its
adoption, if it has not been earlier terminated pursuant to this Section 13,
but the Plan shall remain in full force and effect until the end of the
Offering Period then in effect.
 
  13. Shareholder Approval. Continuance of the Plan and the effectiveness of
any Option granted hereunder shall be subject to approval of the Plan by the
affirmative vote or written consent of the holders of a majority of the
outstanding shares of Stock of the Company present or represented and entitled
to vote thereon, within 12 months after the date of adoption of this Plan by
the Board of Directors.
 
  14. Governing Law. To the extent not governed by federal law, all legal
questions pertaining to the Plan shall be determined in accordance with the
laws of the State of California.
 
                                       5

 
                                                                     EXHIBIT 5.1


          [LETTERHEAD OF RICHMAN, LAWRENCE, MANN, CHIZEVER & PHILLIPS]



                               December 22, 1998




OSI Systems, Inc.
12525 Chadron Avenue
Hawthorne, California 90250

     Re:  Registration Statement on Form S-8
          ----------------------------------

Gentlemen:

     We have acted as securities counsel to OSI Systems, Inc., a California
corporation (the "Company"), in connection with the preparation and filing with
the Securities and Exchange Commission under the Securities Act of 1933, as
amended (the "Securities Act'), of a Registration Statement on Form S-8 (the
"Registration Statement").  The Registration Statement relates to the public
offering by the Company of up to 200,000 shares of Common Stock of the Company
(the "Shares") pursuant to the Company's Employee Stock Purchase Plan.

     This opinion is being furnished in accordance with the requirements of Item
601(b)(5) of Regulation S-K under the Securities Act.

     In connection with this opinion, we have examined and are familiar with
originals or copies, certified or otherwise identified to our satisfaction, of
such documents, corporate records and other instruments as we have deemed
necessary or appropriate as a basis for the opinions set forth herein, including
(i) the Registration Statement of the Company filed with the Securities and
Exchange Commission; (ii) the Articles of Incorporation and the Bylaws of the
Company; (iii) the form of Common Stock Certificate; (v) copies of certain
resolutions adopted by the Board of Directors of the Company relating to the
filing of the Registration Statement and any amendments of supplements thereto
and related matters; and (vi) such other documents as we have deemed necessary
or appropriate as a basis for the opinions set forth below.

 
OSI Systems, Inc.
December 22, 1998
Page 2


     In our examination, we have assumed the genuineness of all signatures, the
legal capacity of all natural persons, the authenticity of all documents
submitted to us as originals, the conformity to original documents of all
documents submitted to us as certified or photostatic copies and the
authenticity of the originals of such latter documents.  In making our
examination of documents executed by parties other than the Company, we have
assumed that such parties had the power, corporate or other, to enter into and
perform all obligations thereunder and have also assumed the due authorization
by all requisite action, corporate or other, and execution and delivery by such
parties of such documents and the validity and binding effect thereof.  As to
any facts material to the opinions expressed herein which were not independently
established or verified, we have relied upon oral or written statements and
representations of officers and other representatives of the Company and others.

     Members of our firm are admitted to the bar in the State of California, and
we do not express any opinion as to the laws of any jurisdiction other than the
corporate laws of the State of California and the laws of the United States of
America to the extent referred to specifically herein.

     Based on the foregoing, it is our opinion that, subject to effectiveness
with the Securities and Exchange Commission of the Registration Statement and to
registration or qualification under the securities laws of the states in which
securities may be sold, the Shares are duly and validly authorized and, when
issued, will constitute legally issued, fully paid and nonassessable shares of
Common Stock of the Company.

     We consent to the use of our name in the Registration Statement, and to the
filing of this opinion as an exhibit to the Registration Statement.  By giving
you this opinion and consent, we do not admit that we are experts with respect
to any part of the Registration Statement within the meaning of the term
"expert" as used in Section 11 of the Securities Act or the rules and
regulations promulgated thereunder, nor do we admit that we are in the category
of persons whose consent is required under Section 7 of the Securities Act.

                                Very truly yours,



                                /s/ Richman, Lawrence, Mann, Chizever & Phillips
                                ------------------------------------------------
                                RICHMAN, LAWRENCE, MANN, CHIZEVER & PHILLIPS

 
                                                                    EXHIBIT 23.2

                         INDEPENDENT AUDITORS' CONSENT


We consent to the incorporation by reference in this Registration Statement of 
OSI Systems, Inc. on Form S-8 of our report dated September 11, 1998, appearing 
in the Annual Report on Form 10-K of OSI Systems, Inc. for the year ended June 
30, 1998.


/s/ Deloitte & Touche LLP

Deloitte & Touche LLP
Los Angeles, California
December 21, 1998