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Transform optical processing system    

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United States Patent5159474   
Link to this pagehttp://www.wikipatents.com/5159474.html
Inventor(s)Franke; Marc A. (Fairfield, IA); Hekker; Roeland M. T. (Fairfield, IA); Livny; Izhak M. (Fairfield, IA); Mercurio; Gregory S. (Fairfield, IA); Casasent; David P. (Pittsburgh, PA)
AbstractThe Fourier transform optical processing system of the present invention includes generating an electrical signal in response to a first image and modulating a beam of coherent light with means that is responsive to the electrical signal. A Fourier transform image of the modulated coherent light beam is formed, an then detected. The detector provides a second electrical signal representative of the Fourier transformed image. Other aspects of the invention include comparing the second electrical signal to a reference electrical signal for producing an output signal representing any differences; optically preprocessing the image; detecting the Fourier transform image and generating signals representative of its Fourier transform characteristics; and modulating a coherent light beam using a liquid crystal or other spatial light modulating device.
   














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Transform optical processing system - US Patent 5159474 Drawing
Transform optical processing system
Inventor     Franke; Marc A. (Fairfield, IA); Hekker; Roeland M. T. (Fairfield, IA); Livny; Izhak M. (Fairfield, IA); Mercurio; Gregory S. (Fairfield, IA); Casasent; David P. (Pittsburgh, PA)
Owner/Assignee     E. I. du Pont De Nemours and Company (Wilmington, DE)
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Publication Date     October 27, 1992
Application Number     07/465,576
PAIR File History     Application Data   Transaction History
Image File Wrapper   Patent Term   Fees
Litigation
Filing Date     January 18, 1990
US Classification     359/29 250/208.6 250/550 349/1 349/72 359/559 359/561 382/210
Int'l Classification     G02B 027/46 G03H 001/16 G06K 009/76
Examiner     Arnold; Bruce Y.
Assistant Examiner     Lerner; Martin
Attorney/Law Firm     Bell, Seltzer, Park & Gibson
Address
Parent Case     This application is a continuation of application Ser. No. 07/920,513, filed Oct. 17, 1986, now abandoned.
Priority Data    
USPTO Field of Search     350/162.12 350/162.13 350/162.14 350/162.15 350/3.7 350/3.72 350/331 T 350/351 382/31 359/559 359/560 359/561 359/564 359/15 359/19 359/29 359/86 250/550 250/206.2 250/208.6
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