7th Amendment to Purchase and Sale


    Exhibit
      10.8.7

    
 

                SEVENTH
      AMENDMENT
      TO

                 PURCHASE
      AND SALE
      AGREEMENT

                AND
      PRELIMINARY
      ESCROW INSTRUCTIONS

    [Portion
      of DiCon Fiberoptics Inc. Land, Regatta Boulevard, Richmond,
      California]

    


    This
      Seventh Amendment to Purchase and Sale Agreement and Preliminary Escrow
      Instructions (the "Seventh
      Amendment") is
      entered into as of December 14, 2005, between DICON FIBEROPTICS, INC., a
      California corporation ("Seller") and
      PULTE
      HOME CORPORATION, a Michigan corporation ("Buyer").

    


    RECITALS

    


    
      	A.  	
              Seller
                and Buyer entered into a Purchase and Sale Agreement and Preliminary
                Escrow Instructions as of February 27, 2004, a First Amendment to
                Purchase
                and Sale Agreement and Preliminary Escrow Instructions as of March
                1,
                2004, a Second Amendment to Purchase and Sale Agreement and Preliminary
                Escrow Instructions as of April 29, 2004, a Third Amendment to Purchase
                and Sale Agreement and Preliminary Escrow Instructions as of February
                27,
                2005, a Fourth Amendment to Purchase and Sale Agreement and Preliminary
                Escrow Instructions as of July 27, 2005, a Fifth Amendment to Purchase
                and
                Sale Agreement and Preliminary Escrow Instructions as of November
                17,
                2005, and a Sixth Amendment to Purchase and Sale Agreement and Preliminary
                Escrow Instructions as of December 14, 2005 (collectively, the
                "Agreement").

            


    

    


    
      	B.  	
              Seller
                and Buyer desire to amend and restate certain provisions of the Agreement
                as provided in this Seventh
                Amendment.

            


    

    


    The
      parties agree as follows:

    


                AGREEMENT

    


    
      	1.  	
              Section
                13.2.2 of the Agreement is hereby amended by substituting the date
                "December 15, 2005" for the date "December 14, 2005" on lines 3 and
                4
                thereof.

            


    

    


    
      	2.  	
              Except
                as amended and restated by this Seventh Amendment, all terms, conditions
                and provisions of the Agreement shall remain in full force and
                effect.

            


    

    


    
      	3.  	
              This
                Seventh Amendment may be executed by the different parties hereto
                on
                separate counterparts each of which, when so executed, shall be deemed
                an
                original but all such counterparts shall constitute but one and the
                same
                agreement.

            


    


    
      
        
        

      

      
        1

        
          

        

      

      
        
        

      

    


    IN
      WITNESS HEREOF, the
      parties hereto have executed this Seventh Amendment as of the date first above
      written.

    


    Seller:       
                                     Buyer:

    


    DICON
      FIBEROPTICS, INC.,                       
PULTE
      HOME
      CORPORATION

    a
      California
      corporation                                                                                              
      a
      Michigan corporation


    


    By: /s/
      Ho-Shang
      Lee                                                          By: /s/
      J. Steven Kalmbach    

    


    Name:
       Ho-Shang
      Lee,
      Ph.D.                                                                                     
      Name:
       J.
      Steven
      Kalmbach

    Its: President
      and
      CEO                                                                                               
      Its: Division
      President

    


    


    Acceptance
      by Escrow Holder

    


    CHICAGO
      TITLE COMPANY hereby acknowledges that it has received originally executed
      counterparts or a fully executed original of the foregoing Seventh Amendment
      to
      Purchase and Sale Agreement and Preliminary Escrow Instructions and agrees
      to
      act as Escrow Agent thereunder and to be bound by and perform the terms thereof
      as such terms apply to Escrow Agent.

    


    CHICAGO
      TITLE COMPANY 

    


    By:
      __________________________________      

    


    Name:
       Laurie
      J.
      Edwards

    Its: Assistant
      Vice President

    Date
      of
      Execution: _______________________