UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                  SCHEDULE 13D
                    Under the Securities Exchange Act of 1934
                               (Amendment No. 4)*


                                 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)

                                 August 28, 2008
--------------------------------------------------------------------------------
             (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:         2,581,097*
                                         ---------------------------------------
   Owned by
   Each Reporting                     9. Sole Dispositive Power:              0
                                         ---------------------------------------
   Person With                       10. Shared Dispositive Power:    2,581,097*
                                         ---------------------------------------
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person:   2,581,097*
--------------------------------------------------------------------------------
12.  Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions):
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11):  10.9%*
--------------------------------------------------------------------------------
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 244,118 shares of common stock, par value
$0.01 per share (the "Shares"),  of Coherent,  Inc., a Delaware corporation (the
"Company"),  owned,  as of August 28,  2008,  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:         2,581,097*
                                         ---------------------------------------
   Owned by
   Each Reporting                     9. Sole Dispositive Power:              0
                                         ---------------------------------------
   Person With                       10. Shared Dispositive Power:    2,581,097*
                                         ---------------------------------------
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person:   2,581,097*
--------------------------------------------------------------------------------
12.  Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions):
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11):  10.9%*
--------------------------------------------------------------------------------
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 244,118 shares of common stock, par value
$0.01 per share (the "Shares"),  of Coherent,  Inc., a Delaware corporation (the
"Company"),  owned,  as of August 28,  2008,  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:         2,581,097*
                                         ---------------------------------------
   Owned by
   Each Reporting                     9. Sole Dispositive Power:              0
                                         ---------------------------------------
   Person With                       10. Shared Dispositive Power:    2,581,097*
                                         ---------------------------------------
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person:   2,581,097*
--------------------------------------------------------------------------------
12.  Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions):
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11):  10.9%*
--------------------------------------------------------------------------------
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 244,118 shares of common stock, par value
$0.01 per share (the "Shares"),  of Coherent,  Inc., a Delaware corporation (the
"Company"),  owned,  as of August 28,  2008,  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:                   0
                                         ---------------------------------------
   Shares Beneficially                8. Shared Voting Power:         2,581,097*
                                         ---------------------------------------
   Owned by
   Each Reporting                     9. Sole Dispositive Power:              0
                                         ---------------------------------------
   Person With                       10. Shared Dispositive Power:    2,581,097*
                                         ---------------------------------------
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person:    2,581,097*
--------------------------------------------------------------------------------
12.  Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions):
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11):  10.9%*
--------------------------------------------------------------------------------
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 244,118 shares of common stock, par value
$0.01 per share (the "Shares"),  of Coherent,  Inc., a Delaware corporation (the
"Company"),  owned,  as of August 28,  2008,  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 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 August  28,  2008,  Davenport  owned
244,118 Shares, JE owned 2,280,771 Shares,  and Master Fund owned 56,208 Shares,
constituting 1.0%, 9.6% and 0.2%,  respectively,  and 10.9% in the aggregate, of
the  23,729,545  Shares  outstanding  as of July 31,  2008,  as disclosed in the
Company's  quarterly  report on Form 10-Q for the quarter  ended June 28,  2008.
OPP, as the investment  adviser to 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.

          On August  28,  2008,  Master  Fund sold  22,992  Shares at a price of
$36.6396 per share in an ordinary course brokerage transaction.  No other filing
person had any  transactions  in Shares in the last  sixty  (60)  days,  or from
August 28, 2008 through and including August 29, 2008."


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


          Exhibit A - Joint Filing  Agreement,  dated as of August 29, 2008,  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.

                                            August 29, 2008


                                            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. 4 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).


                                            August 29, 2008



                                            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