G - Physics – 02 – B
Patent
G - Physics
02
B
88/96.8
G02B 27/02 (2006.01) G02B 26/10 (2006.01) G06E 3/00 (2006.01) H04N 1/04 (2006.01) H04N 3/08 (2006.01)
Patent
CA 2017202
34 ED-0357 TITLE SCANNING BEAM OPTICAL SIGNAL PROCESSOR ABSTRACT OF THE INVENTION The present invention relates to a scanning beam optical processing system which combines Fourier optics with the ability to scan a stationary object plane. A scanning system moves a beam of light over a stationary medium and directs the light to a beam deflector. A descanning position control system re-establishes the beam deflected from the beam deflector along a stationary optical path for optical processing of information obtained from the medium. Hyperbolic lenses are used in the scanning system. The descanning position control system includes a controller comprising a detector for sensing a portion of the beam deflected from the beam deflector and for generating a signal representative of the position thereof and a differential amplifier for comparing the signal representative of the position of the deflected beam of light with a signal representative of the predetermined fixed reference axis for generating a beam deflector drive signal in response thereto.
E. I. Du Pont de Nemours And Company
Sim & Mcburney
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