UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                  SCHEDULE 13D
                    Under the Securities Exchange Act of 1934
                               (Amendment No. 6)*


                                 Coherent, Inc.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                     Common Stock, par value $0.01 per share
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    192479103
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                                 with a copy to:
     Augustus K. Oliver                          Allen B. Levithan, Esq.
     Oliver Press Partners, LLC                  Lowenstein Sandler PC
     152 West 57th Street                        65 Livingston Avenue
     New York, New York 10019                    Roseland, New Jersey 07068
     (212) 277-5654                              (973) 597-2406
--------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                November 19, 2009
--------------------------------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)



If the filing person has previously  filed a statement on Schedule l3G to report
the  acquisition  that is the subject of this  Schedule  13D, and is filing this
schedule because of Sections 240.13d-1(e),  240.13d-1(f) or 240.13d-1(g),  check
the following box. [ ]

Note:  Schedules  filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits.  See Section 240.13d-7 for other
parties to whom copies are to be sent.

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).




Cusip No.     192479103
--------------------------------------------------------------------------------
1.   Names of Reporting  Persons:  Oliver Press Partners, LLC
     I.R.S.  Identification  Nos. of above persons (entities only):  20-2688930

--------------------------------------------------------------------------------
2.   Check the Appropriate Box if a Member of a Group (See Instructions):

     (a)
     (b)    X
--------------------------------------------------------------------------------
3.   SEC Use Only

--------------------------------------------------------------------------------
4.   Source of Funds (See Instructions):  OO
--------------------------------------------------------------------------------
5.   Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d)
     or 2(e):

--------------------------------------------------------------------------------
6.   Citizenship or Place of Organization:  Delaware
--------------------------------------------------------------------------------

   Number of                          7. Sole Voting Power:                   0
                                         ---------------------------------------
   Shares Beneficially                8. Shared Voting Power:         2,531,676*
                                         ---------------------------------------
   Owned by
   Each Reporting                     9. Sole Dispositive Power:              0
                                         ---------------------------------------
   Person With                       10. Shared Dispositive Power:    2,531,676*
                                         ---------------------------------------
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person:   2,531,676*
--------------------------------------------------------------------------------
12.  Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions):
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11):  10.4%*
--------------------------------------------------------------------------------
14.  Type of Reporting Person (See Instructions):  IA
--------------------------------------------------------------------------------

* This is a joint filing by Oliver Press Partners,  LLC, Oliver Press Investors,
LLC,  Augustus K. Oliver and Clifford Press, who share the power to vote and the
power to direct the disposition of the 194,897 shares of common stock, par value
$0.01 per share (the "Shares"),  of Coherent,  Inc., a Delaware corporation (the
"Company"),  owned,  as of November 19, 2009,  by  Davenport  Partners,  L.P., a
Delaware  limited  partnership,  the  2,280,771  Shares owned by JE Partners,  a
Bermuda partnership, and the 56,208 Shares owned by Oliver Press Master Fund LP,
a Cayman limited partnership.




Cusip No.     192479103
--------------------------------------------------------------------------------
1.   Names of Reporting  Persons:  Oliver Press Investors, LLC
     I.R.S.  Identification  Nos. of above persons (entities only):  20-2688868

--------------------------------------------------------------------------------
2.   Check the Appropriate Box if a Member of a Group (See Instructions):

     (a)
     (b)    X
--------------------------------------------------------------------------------
3.   SEC Use Only

--------------------------------------------------------------------------------
4.   Source of Funds (See Instructions):  OO
--------------------------------------------------------------------------------
5.   Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d)
     or 2(e):

--------------------------------------------------------------------------------
6.   Citizenship or Place of Organization:  Delaware
--------------------------------------------------------------------------------

   Number of                          7. Sole Voting Power:                   0
                                         ---------------------------------------
   Shares Beneficially                8. Shared Voting Power:         2,531,676*
                                         ---------------------------------------
   Owned by
   Each Reporting                     9. Sole Dispositive Power:              0
                                         ---------------------------------------
   Person With                       10. Shared Dispositive Power:    2,531,676*
                                         ---------------------------------------
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person:   2,531,676*
--------------------------------------------------------------------------------
12.  Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions):
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11):  10.4%*
--------------------------------------------------------------------------------
14.  Type of Reporting Person (See Instructions):  PN
--------------------------------------------------------------------------------

* This is a joint filing by Oliver Press Partners,  LLC, Oliver Press Investors,
LLC,  Augustus K. Oliver and Clifford Press, who share the power to vote and the
power to direct the disposition of the 194,897 shares of common stock, par value
$0.01 per share (the "Shares"),  of Coherent,  Inc., a Delaware corporation (the
"Company"),  owned,  as of November 19, 2009,  by  Davenport  Partners,  L.P., a
Delaware  limited  partnership,  the  2,280,771  Shares owned by JE Partners,  a
Bermuda partnership, and the 56,208 Shares owned by Oliver Press Master Fund LP,
a Cayman limited partnership.




Cusip No.     192479103
--------------------------------------------------------------------------------
1.   Names of Reporting  Persons:  Augustus K. Oliver
     I.R.S.  Identification  Nos. of above persons (entities only):

--------------------------------------------------------------------------------
2.   Check the Appropriate Box if a Member of a Group (See Instructions):

     (a)
     (b)    X
--------------------------------------------------------------------------------
3.   SEC Use Only

--------------------------------------------------------------------------------
4.   Source of Funds (See Instructions):  OO
--------------------------------------------------------------------------------
5.   Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d)
     or 2(e):

--------------------------------------------------------------------------------
6.   Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------

   Number of                          7. Sole Voting Power:                   0
                                         ---------------------------------------
   Shares Beneficially                8. Shared Voting Power:         2,531,676*
                                         ---------------------------------------
   Owned by
   Each Reporting                     9. Sole Dispositive Power:              0
                                         ---------------------------------------
   Person With                       10. Shared Dispositive Power:    2,531,676*
                                         ---------------------------------------
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person:   2,531,676*
--------------------------------------------------------------------------------
12.  Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions):
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11):  10.4%*
--------------------------------------------------------------------------------
14.  Type of Reporting Person (See Instructions):  IN
--------------------------------------------------------------------------------

* This is a joint filing by Oliver Press Partners,  LLC, Oliver Press Investors,
LLC,  Augustus K. Oliver and Clifford Press, who share the power to vote and the
power to direct the disposition of the 194,897 shares of common stock, par value
$0.01 per share (the "Shares"),  of Coherent,  Inc., a Delaware corporation (the
"Company"),  owned,  as of November 19, 2009,  by  Davenport  Partners,  L.P., a
Delaware  limited  partnership,  the  2,280,771  Shares owned by JE Partners,  a
Bermuda partnership, and the 56,208 Shares owned by Oliver Press Master Fund LP,
a Cayman limited partnership.





Cusip No.     192479103
--------------------------------------------------------------------------------
1.   Names of Reporting  Persons:  Clifford Press
     I.R.S.  Identification  Nos. of above persons (entities only):

--------------------------------------------------------------------------------
2.   Check the Appropriate Box if a Member of a Group (See Instructions):

     (a)
     (b)    X
--------------------------------------------------------------------------------
3.   SEC Use Only

--------------------------------------------------------------------------------
4.   Source of Funds (See Instructions):  OO
--------------------------------------------------------------------------------
5.   Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d)
     or 2(e):

--------------------------------------------------------------------------------
6.   Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------

   Number of                          7. Sole Voting Power:               2,000
                                         ---------------------------------------
   Shares Beneficially                8. Shared Voting Power:         2,531,676*
                                         ---------------------------------------
   Owned by
   Each Reporting                     9. Sole Dispositive Power:          2,000
                                         ---------------------------------------
   Person With                       10. Shared Dispositive Power:    2,531,676*
                                         ---------------------------------------
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person:    2,531,676*
--------------------------------------------------------------------------------
12.  Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions):
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11):  10.4%*
--------------------------------------------------------------------------------
14.  Type of Reporting Person (See Instructions):  IN
--------------------------------------------------------------------------------


* This is a joint filing by Oliver Press Partners,  LLC, Oliver Press Investors,
LLC,  Augustus K. Oliver and Clifford Press, who share the power to vote and the
power to direct the disposition of the 194,897 shares of common stock, par value
$0.01 per share (the "Shares"),  of Coherent,  Inc., a Delaware corporation (the
"Company"),  owned,  as of November 19, 2009,  by  Davenport  Partners,  L.P., a
Delaware  limited  partnership,  the  2,280,771  Shares owned by JE Partners,  a
Bermuda partnership, and the 56,208 Shares owned by Oliver Press Master Fund LP,
a Cayman limited partnership.





Item 4.   Purpose of Transaction.
          ----------------------

          Item 4 is hereby amended as follows:

          The first paragraph of Item 4 is hereby deleted.

          The current  second and third  paragraphs,  relating to the  agreement
dated  January  31,  2008  between  the Filing  Parties  and the Company and the
amendment  thereof  as of  January  5,  2009,  remain in effect as the first two
paragraphs of this Item 4.

          The  remainder  of  Item  4 is  hereby  deleted  and  replaced  by the
following paragraph:

          "On November 18, 2009,  Clifford  Press  resigned as a Director of the
Company.  OPP  expects  from time to time to dispose of shares of the  Company's
common stock,  through  distributions to limited partners or sales,  although if
market conditions warrant, it may consider purchasing additional shares."


Item 5.   Interest in Securities of the Issuer.
          -------------------------------------

          Item 5 is  hereby  deleted  in its  entirety  and  replaced  with  the
following:

          "As of the close of business on November  19,  2009,  Davenport  owned
194,897 Shares, JE owned 2,280,771 Shares,  and Master Fund owned 56,208 Shares,
constituting 0.8%, 9.3% and 0.2%,  respectively,  and 10.4% in the aggregate, of
the  approximately  24,454,611  Shares  outstanding  as of  July  31,  2009,  as
disclosed  in the  Company's  quarterly  report on Form  10-Q for the  quarterly
period ended July 4, 2009. OPP, as the investment  adviser to Davenport,  JE and
Master Fund (collectively,  the  "Partnerships"),  has the power to vote and the
power to direct the  disposition of such Shares.  OPI, as the general partner of
the Partnerships,  and Messrs. Oliver and Press, as the  Managing Members of OPP
and OPI, share the power to vote and the power to direct the disposition of such
Shares.  As of the close of business  on November  19,  2009,  Mr. Press  owned,
individually, 2,000 Shares.

          The following table details the transactions  during the sixty days on
or prior to November  19,  2009,  in Shares,  or  securities  convertible  into,
exercisable for or exchangeable for Shares, effected by the Partnerships, or any
other person or entity  controlled by the  Partnerships  or any person or entity
for  which  the  Partnerships  possess  voting or  investment  control  over the
securities  thereof  (each  of  which  was  effected  in an  ordinary  brokerage
transaction).


                                      Sales

        Date                  Security        Amount         Price

        11/10/2009            Shares          4,300          $26.5826
        11/13/2009            Shares          4,921          $26.5008
        11/16/2009            Shares          20,000         $26.8878
        11/17/2009            Shares          20,000         $27.1255
        11/18/2009            Shares          200            $27.25"





Item 7.   Exhibits.
          --------

          Exhibit A - Joint Filing  Agreement, dated as of November 19, 2009, by
and among Oliver Press Investors,  LLC, Oliver Press Partners,  LLC, Augustus K.
Oliver and Clifford Press.








                                    Signature
                                    ---------

          After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.

                                            November 19, 2009


                                            OLIVER PRESS INVESTORS, LLC

                                            By: /s/ Augustus K. Oliver
                                               ---------------------------------
                                                    Augustus K. Oliver
                                                    Managing Member


                                            OLIVER PRESS PARTNERS, LLC

                                            By: /s/ Clifford Press
                                               ---------------------------------
                                                    Clifford Press
                                                    Managing Member


                                            /s/ Augustus K. Oliver
                                            ------------------------------------
                                                Augustus K. Oliver


                                            /s/ Clifford Press
                                            ------------------------------------
                                                Clifford Press



  Attention: Intentional misstatements or omissions of fact constitute Federal
                    criminal violations (See 18 U.S.C. 1001).





                                   Exhibit A

                             JOINT FILING AGREEMENT
                             ----------------------



          The undersigned  agree that this Schedule 13D Amendment No. 6 relating
to the shares of common  stock of Coherent,  Inc. is filed  jointly on behalf of
each of the undersigned pursuant to Rule 13d-1(k).


                                            November 19, 2009



                                            OLIVER PRESS INVESTORS, LLC

                                            By: /s/ Augustus K. Oliver
                                               ---------------------------------
                                                    Augustus K. Oliver
                                                    Managing Member


                                            OLIVER PRESS PARTNERS, LLC

                                            By: /s/ Clifford Press
                                               ---------------------------------
                                                    Clifford Press
                                                    Managing Member



                                            /s/ Augustus K. Oliver
                                            ------------------------------------
                                                Augustus K. Oliver



                                            /s/ Clifford Press
                                            ------------------------------------
                                                Clifford Press