Optical information processing apparatus and method using computer generated hologram

Claim 2

The optical information processing apparatus as claimed in claim 1 wherein each of said first to third spatial light modulators is comprised of a liquid crystal display.

Claim 3

An optical information processing apparatus comprising: an input means for inputting an image of an object; a first spatial light modulator for displaying an input image; a light source for irradiating said first light modulator; a first lens means arranged so as for its front focal plane to coincide with the plane on which said first spatial light modulator is arranged; a second spatial light modulator arranged on the rear focal plane of said first lens means for displaying a coordinate-transforming computer generated hologram for coordinate-transforming said input image and a computer generated hologram regarding a reference pattern to be compared with said input image, selectively; a second lens means arranged so as for its front focal plane to coincide with the rear focal plane of said first lens means; a photoelectric transforming device arranged on the rear focal plane of said second lens means; and a signal transforming means for transforming output signals of said photoelectric transforming device to input the transformed signals as input signals to said first and second spatial light modulators selectively.

Claim 4

The optical information processing apparatus as claimed in claim 3 wherein each of said first and second spatial light modulators is comprised of a liquid crystal display.

Claim 5

An optical information processing apparatus comprising: an input means for inputting an image of an object; a first spatial light modulator for displaying an input image; a light source for irradiating said first light modulator; a first lens means arranged so as for its front focal plane to coincide with the plane on which said first spatial light modulator is arranged; a second spatial light modulator arranged on the rear focal plane of said first lens means: a second lens means arranged so as for its front focal plane to coincide with the rear focal plane of said first lens means; a third spatial light modulator for displaying a computer generated hologram regarding; a reference pattern to be compared with said input image and a coordinate-transforming the image displayed on said first spatial light modulator selectively; a third lens means for projecting an image displayed on said third spatial light modulator onto said second spatial light modulator in a contracted scale; a photoelectric transforming device arranged on the rear focal plane of said second lens means; and a signal transforming means for transforming output signals of said photoelectric transforming device to input transformed signals as display signals to said first and third spatial light modulators selectively.

Claim 6

The optical information processing apparatus as claimed in claim 5 wherein each of said first to third spatial light modulators is comprised of a liquid crystal display.

Claim 7

An optical information processing apparatus comprising: an input means for inputting an image of an object;    a first spatial light modulator for displaying an input image; a light source for irradiating said first light modulator; a first lens means arranged so as for its front focal plane to coincide with the plane on which said first spatial light modulator is arranged; a second spatial light modulator arranged on the rear focal plane of said first lens for displaying information as a matched filter and information as an optical product of said information as a matched filter and phase information for coordinate transformation, selectively, in a form of a computer generated hologram; a second lens means arranged so as for its focal plane to coincide with the rear focal plane of said first lens means; and a photo detecting device arranged on the rear focal plane of said second lens means.

Claim 8

The optical information processing apparatus as claimed in claim 7 wherein each of said first and second spatial light modulators is comprised of a liquid crystal display.

Claim 9

An optical information processing apparatus comprising: an input means for inputting an image of an object;    a first spatial light modulator for displaying an input image; a light source for irradiating said first light modulator; a first lens means arranged so as for its front focal plane to coincide with the plane on which said first spatial light modulator is arranged; a second spatial light modulator arranged on the rear focal plane of said first lens means; a second lens means arranged so as for its front focal plane to coincide with the rear focal plane of said first lens means; a third spatial light modulator for displaying information as a matched filter and information as an optical product of said information as a matched filter and phase information for coordinate transformation, selectively, in a form of a computer generated hologram; a third lens means for projecting an image displayed by said third spatial light modulator onto said second spatial light modulator in a contracted scale; a photoelectric transforming device arranged on the rear focal plane of said second lens means; and a signal transforming means for transforming output signals of said photoelectric transforming device and inputting transformed signals as display signals to said first and second spatial light modulators selectively.

Claim 10

The optical information processing apparatus as claimed in claim 9 wherein each of said first to third spatial light modulators is comprised of a liquid crystal display.

Claim 11

An optical information processing method for recognizing an image of an object comprising steps of accessing information (f) regarding an input image; Fourier-transforming said information (F); forming a first complex amplitude information (FxA) from the Fourier-transformed information (F) and phase information (A); forming a coordinate-transformed image by Fourier-transforming said first complex amplitude information; accessing said coordinate-transformed image; forming a second complex amplitude information from information obtained by Fourier-transforming said coordinate-transformed image of said Fourier-transformed image of said input image and information obtained by a Fourier-transformed image of a reference image; and Fourier-transforming said second complex amplitude information.

Claim 12

An optical information processing method for recognizing an image of an object comprising steps of: accessing information (f) regarding an input image;    forming a complex amplitude information (FxAxHxA) from information F obtained by Fourier-transforming said information (f), phase information A and information H obtained by Fourier-transforming a reference image; and Fourier-transforming said complex amplitude information.