UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934

                                (Amendment No. 2)

                              Spectra-Physics, Inc.

                                (Name of Issuer)

                     Common Stock, par value $.01 per share
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                         (Title of Class of Securities)

                                   847568 10 2
                           -------------------------
                                 (CUSIP Number)

                             Seth H. Hoogasian, Esq.
                                 General Counsel
                                 (781) 622-1000

                           Thermo Electron Corporation
                                 81 Wyman Street
                             Waltham, MA 02454-9046
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(Name, Address and Telephone Number of Person Authorized to Receive Notices and
                                 Communications)


                                  June 20, 2001
                                 ---------------
             (Date of Event which Requires Filing of this Statement)

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If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box
[ ].
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-------------------------------------------------------------------------------
                            NAME OF REPORTING PERSON
                            I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
             1              Thermo Electron Corporation
                            IRS No. 04-2209186
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             2              CHECK THE APPROPRIATE BOX IF A MEMBER OF A
                            GROUP*
                                                                       (a) [   ]
                                                                       (b) [ x ]
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             3              SEC USE ONLY
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             4              SOURCE OF FUNDS*

                            OO and WC
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             5              CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS
                            IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)
                                                                           [   ]
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             6              CITIZENSHIP OR PLACE OF ORGANIZATION


                            State of Delaware
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 NUMBER OF SHARES     7     SOLE VOTING POWER
   BENEFICIALLY
  OWNED BY EACH             13,333,000
 REPORTING PERSON
       WITH
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                      8     SHARED VOTING POWER


                            0
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                            SOLE DISPOSITIVE POWER

                      9
                            13,333,000
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                      10    SHARED DISPOSITIVE POWER


                            0
--------------------------------------------------------------------------------





--------------------------------------------------------------------------------
            11              AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
                            REPORTING PERSON

                            13,333,000
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            12              CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11)
                            EXCLUDES CERTAIN SHARES*                       [   ]
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            13              PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11


                            79.8%
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            14              TYPE OF REPORTING PERSON *

                            CO
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     Thermo  Electron  Corporation  hereby  amends its statement on Schedule 13D
relating  to the shares  (the  "Shares")  of common  stock,  par value $0.01 per
share, of Spectra-Physics, Inc. (the "Issuer"), as set forth below.

Item 2.  Identity and Background

     Item 2 is hereby amended and restated to read as follows:

     This  Amendment  is  being  filed  by  Thermo  Electron   Corporation  (the
"Reporting  Person"),   pursuant  to  Rule  13d-2,  to  reflect  the  change  of
information  previously reported under Items 3, 4, and 5 of the initial Schedule
13D. The Reporting Person holds the Shares of the Issuer that are the subject of
this Amendment directly and through one or more wholly-owned subsidiaries. As of
the date of this Amendment,  13,000,000 Shares were held by Spectra-Physics  AB,
which is a  wholly-owned  subsidiary of the Reporting  Person,  and 333,000 were
held directly by the Reporting Person.

     The Reporting  Person develops,  manufactures and markets  technology-based
instruments, components and systems serving multiple markets, including, without
limitation,  life  sciences,  telecommunications  and  food,  drug and  beverage
production.  The  Reporting  Person  also  develops,  manufactures  and  markets
diagnostic and monitoring  products  serving the healthcare  industry as well as
systems,  equipment and  accessories  for the  paper-making  and paper recycling
industries.

     The  principal  business  address  and  principal  office  address  of  the
Reporting  Person,  a  Delaware  corporation,   is  81  Wyman  Street,  Waltham,
Massachusetts 02454-9046.

     Appendix  A attached  to this  Amendment  sets  forth with  respect to each
executive  officer and director of the Reporting Person his or her (a) name; (b)
residence or business address;  (c) present  principal  occupation or employment
and the  name,  principal  business  and  address  of any  corporation  or other
organization in which such employment is conducted; and (d) citizenship.  To the
knowledge of the Reporting Person,  there is no person who may be deemed to be a
controlling person of the Reporting Person.

     During  the last five  years,  neither  the  Reporting  Person  nor (to the
knowledge  of the  Reporting  Person) any  executive  officer or director of the
Reporting Person has been convicted in a criminal proceeding  (excluding traffic
violations and similar misdemeanors).

     During  the last five  years,  neither  the  Reporting  Person  nor (to the
knowledge  of the  Reporting  Person) any  executive  officer or director of the
Reporting  Person  has  been a party  to a civil  proceeding  of a  judicial  or
administrative  body of competent  jurisdiction  which  resulted in a judgement,
decree or final order (i) enjoining  future  violations  of, or  prohibiting  or
mandating  activities  subject  to,  federal  or state  securities  laws or (ii)
finding a violation with respect to such laws.






Item 3.      Source and Amount of Funds or Other Consideration.

     Item 3 is hereby amended and restated in its entirety as follows:

     Of the  13,333,000  Shares of the Issuer that are subject of this  Schedule
13D,  333,000 Shares were acquired  directly by the Reporting Person for cash on
the open  market  at a price  per share of $17.67  using  working  capital.  The
Reporting  Person  acquired  13,000,000  Shares  indirectly  as a result  of its
acquisition of Spectra-Physics AB in 1999, as described in Item 4 below.

Item 4.      Purpose of Transaction

     Item 4 is hereby amended and restated in its entirety as follows:

     On February 22, 1999, Thermo Instrument Systems Inc. ("Thermo Instrument"),
a subsidiary  of the Reporting  Person,  concluded a tender offer for all of the
outstanding  shares of  Spectra-Physics  AB, a publicly  traded company with its
shares  listed on the  Stockholm  Stock  Exchange and the parent  company of the
Issuer.   As  of  such  date,  Thermo  Instrument  had  purchased  and  received
acceptances for approximately 17.3 million,  or approximately 98 percent, of all
of the outstanding  Spectra-Physics AB shares.  Subsequent to February 22, 1999,
Thermo Instrument acquired the remaining outstanding shares under the compulsory
acquisition rules applicable to Swedish companies.

     As a consequence  of Thermo  Instrument's  acquisition  of the  outstanding
shares of  Spectra-Physics  AB, the  Reporting  Person  has become the  ultimate
beneficial owner of all of the Shares of the Issuer owned by Spectra-Physics AB.
On June 20, 2001,  the Reporting  Person  acquired  333,000 Shares of the Issuer
directly on the open market in one  transaction.  The Reporting  Person acquired
these  Shares  because it believed the  acquisition  represented  an  attractive
opportunity to acquire a significant number of Shares at an acceptable price.

     The Reporting  Person has no present plans or proposals  which relate to or
would  result  in any  extraordinary  corporate  transaction,  such as a merger,
reorganization,  liquidation, or sale or transfer of a material amount of assets
involving the Issuer,  or any material  changes in the Issuer's  capitalization,
dividend policy,  corporate structure,  business or the composition of its board
of directors, although the Reporting Person does not rule out the possibility of
effecting or seeking to effect such actions in the future.  The Reporting Person
intends to continue to cause a majority of the members of the Issuer's  board of
directors to consist of the Reporting Person's designees. From time to time, the
Reporting  Person has loaned,  and may continue to loan,  money to the Issuer in
such  a  manner  and in  such  amounts  as it and  the  Issuer  determine  to be
appropriate.

     The Reporting  Person has no present plans or proposals to make  additional
purchases  or sales of Shares or other  securities  of the Issuer,  although the
Reporting  Person does not rule out the  possibility  of effecting or seeking to
effect  such  actions  in the future in such  manner  and in such  amounts as it
determines to be appropriate.






     Except as set forth in this Item 4 and Item 6, neither the Reporting Person
nor, to the  Reporting  Person's  knowledge,  any of the  executive  officers or
directors  of the  Reporting  Person has any current  plans or  proposals  which
relate to or would result in any of the actions specified in clauses (a) through
(j) of Item 4 of Schedule  13D,  although  the  Reporting  Person and such other
persons do not rule out the  possibility  of  effecting or seeking to effect any
such  actions in the  future.  In  determining  whether to do so, the  Reporting
Person will consider various relevant  factors,  including its evaluation of the
Issuer's  business,  prospects  and financial  condition,  amounts and prices of
available  securities  of the Issuer,  the market for the  Issuer's  securities,
other  opportunities  available to the Reporting  Person and general  market and
economic conditions.

Item 5.      Interest in Securities of the Issuer.

     Item 5 is hereby amended and restated in its entirety as follows:

     (a) The  13,333,000  Shares  beneficially  owned  by the  Reporting  Person
consist of  13,000,000  Shares owned by  Spectra-Physics  AB and 333,000  Shares
owned directly by the Reporting Person, and represent approximately 79.8% of the
outstanding  Shares.  To the  knowledge of the Reporting  Person,  the executive
officers and directors of the Reporting Person beneficially own no Shares within
the meaning of Rule 13d-3 of the Securities Exchange Act of 1934, as amended.

     (b) The  Reporting  Person  has the sole  power to vote and  dispose of the
Shares beneficially owned by it.

     (c) On June 20, 2001, the Reporting Person acquired 333,000 Shares for cash
on the open  market at a price  per share of  $17.67.  To the  knowledge  of the
Reporting Person,  the executive  officers and directors of the Reporting Person
have effected no transactions in the Shares during the past 60 days.

     (d) Not applicable.


     (e) Not applicable.











                                    Signature

     After reasonable  inquiry and to the best of its knowledge and belief,  the
Reporting  Person  certifies that the information set forth in this statement is
true, complete and correct.



Date: June 22, 2001                     THERMO ELECTRON CORPORATION



                                        By:  /s/ Kenneth J. Apicerno
                                             ------------------------------
                                             Kenneth J. Apicerno
                                             Treasurer





      Appendix A is hereby amended and restated in its entirety as follows:


                                   APPENDIX A

     The following  individuals  are  executive  officers or directors of Thermo
Electron  Corporation  ("Thermo  Electron").  Unless  otherwise  noted, all such
individuals  are citizens of the United  States.  Unless  otherwise  noted,  the
business address of each executive officer and director of Thermo Electron is 81
Wyman Street, Waltham, Massachusetts 02454-9046.

      Samuel W. Bodman, III:                           Director, Thermo Electron
      ----------------------

     Dr.  Bodman was  formerly  the  Chairman  of the Board and Chief  Executive
Officer  of  Cabot  Corporation,  a  manufacturer  of  specialty  chemicals  and
materials.

      Peter O. Crisp:                                  Director, Thermo Electron
      ---------------

     Mr.  Crisp  was,  until  September  1997,  a  General  Partner  of  Venrock
Associates, a venture capital investment firm.

      Frank Jungers:                                   Director, Thermo Electron
      --------------

     Mr.  Jungers is a consultant on business and energy  matters.  His business
address is 822 NW Murray, PMB 242, Portland, Oregon 97229.

      Jim P. Manzi:                                    Director, Thermo Electron
      ------------

     Mr.  Manzi is a private  entrepreneur  involved  in a number of  technology
start-up ventures primarily related to the Internet.

      Robert A. McCabe:                                Director, Thermo Electron
      -----------------

     Mr.  McCabe  is  the  President  of  Pilot  Capital  Corporation,   a  firm
specializing  in private  investment  and  acquisition  services.  His  business
address is Pilot Capital Corporation,  444 Madison Avenue, Suite 2103, New York,
New York 10022.

      Robert W. O'Leary:                               Director, Thermo Electron
      ------------------

     Mr. O'Leary is a consultant on healthcare  matters and, until October 2000,
was the President and Chief  Executive  Officer of  PacifiCare  Health  Systems,
Inc., a managed health service corporation.

      Hutham S. Olayan:                                Director, Thermo Electron
      -----------------

     Ms. Olayan is the President  and a director of Olayan  America  Corporation
and the President of Competrol Real Estate Limited, firms engagement in advisory
services and private  real estate  investments.  Her  business  address is Suite
1100, 505 Park Avenue, New York, New York 10022.




                                                    

      Richard F. Syron:                                Director, Chairman of the Board
      -----------------                                and Chief Executive Officer, Thermo
                                                       Electron

      Marijn E. Dekkers:                               Director, President and Chief
      ------------------                               Operating Officer, Thermo Electron

      Mr. Dekkers is a citizen of The Netherlands.

      Guy Broadbent:                                   Vice President, Thermo Electron; President,
      --------------                                   Optical Technologies

      Mr. Broadbent is a citizen of the United Kingdom.

      Barry S. Howe:                                   Vice President, Thermo Electron;
      --------------                                   President, Measurement and Control

      Colin Maddix:                                    Vice President, Thermo Electron;
      ------------                                     President, Life Sciences

      Seth H. Hoogasian:                               Vice President and General Counsel,
      ------------------                               Thermo Electron

      Theo Melas-Kyriazi:                              Vice President and Chief
      -------------------                              Financial Officer, Thermo Electron

      Mr. Melas-Kyriazi is a citizen of Greece.

      Peter E. Hornstra:                               Corporate Controller and Chief
      ------------------                               Accounting Officer, Thermo Electron