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

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934

                                (Amendment No. 1)

                          Spectra-Physics Lasers, Inc.
                           --------------------------

                                (Name of Issuer)

                     Common Stock, par value $.01 per share
 -------------------------------------------------------------------------------
                         (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
 -------------------------------------------------------------------------------

   (Name, Address and Telephone Number of Person Authorized to Receive Notices
                               and Communications)


                                February 21, 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
[ ].
--------------------------------------------------------------------------------







--------------------------------------------------------------------------------
            1              NAME OF REPORTING PERSON
                           I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                           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

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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            13,000,000
 REPORTING PERSON
       WITH
--------------------------------------------------------------------------------
                      8    SHARED VOTING POWER

                           0
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                      9    SOLE DISPOSITIVE POWER

                           13,000,000

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                     10    SHARED DISPOSITIVE POWER

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



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

                           13,000,000

--------------------------------------------------------------------------------
            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

                           78.1%

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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 Lasers, 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 4, 5 and 7 of the initial Schedule
13D. The Reporting Person holds the Shares of the Issuer that are the subject of
this Amendment 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.

      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 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.

      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.  The Reporting Person
also may,  from time to time,  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  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  Shares  beneficially  owned by the  Reporting  Person  consist of
13,000,000 Shares, or approximately  78.1% of the outstanding  Shares,  owned by
Spectra-Physics  AB. To the  knowledge of the  Reporting  Person,  the executive
officers and directors of the Reporting Person beneficially own no Shares.

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

      (c) As described in Item 4, the Reporting  Person has purchased all of the
outstanding  shares of  Spectra-Physics  AB,  which  purchases  resulted  in the
Reporting Person becoming the ultimate beneficial owner of 80.4% of the Issuer's
Shares  owned  by  Spectra-Physics  AB.  Subsequently,  the  Issuer  has  issued
additional Shares, which has diluted the Reporting Person's beneficial ownership
to 78.1%. The Reporting Person has effected no transactions in the Shares during
the past 60 days and, 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.

Item 7.   Material to be Filed as Exhibits.

      Item 7 is hereby amended and restated in its entirety as follows:

      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: February 21, 2001




THERMO ELECTRON CORPORATION

By:  /s/ Theo Melas-Kyriazi
     --------------------------------------
     Theo Melas-Kyriazi
     Chief Financial Officer and Vice President





            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 is the  Chairman  of the Board and Chief  Executive  Officer of
Cabot  Corporation,  a manufacturer  of specialty  chemicals and materials.  His
business  address  is  Two  Seaport  Lane,  Suite  1300,  Boston,  Massachusetts
02210-2019.

Peter O. Crisp:                              Director, Thermo Electron

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

Elias P. Gyftopoulos:                        Director, Thermo Electron

     Dr.  Gyftopoulos is Professor  Emeritus of the  Massachusetts  Institute of
Technology. His business address is Massachusetts Institute of Technology,  Room
24-111, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139.

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