Real time optical correlation system

Claim 2

An optical correlation unit for providing a correlation image from image data representing a first object and Fourier transform image data representing a second object, comprising: a first phase modulating spatial light modulator, having an array of reflective elements and means for receiving electronic input to each reflective element, wherein said electronic input represents a point of an input image and controls the phase modulation by said reflective; element of light incident on its surface; a coherent light source for illuminating the surface of said reflective elements of said first spatial light modulator; a first Fourier transform lens for receiving light reflected from the surface of said first phase modulating spatial light modulator; a second phase modulating spatial light modulator, having an array of reflective elements and having means for receiving electronic input to each reflective element, wherein said electronic input represents a point of an input image and that controls the phase modulation by said reflective element, and wherein said second phase modulating spatial light modulator is located at the Fourier image plane of said first Fourier transform lens; means for directing light reflected from said second spatial light modulator to a second Fourier transform lens; a second Fourier transform lens for receiving said light reflected from said second spatial light modulator; and an image capture device located at the Fourier image plane of said second Fourier transform lens.

Claim 3

The optical correlation unit of claim 1, wherein said second spatial light modulator is tilted at an angle with respect to the image plane of said first Fourier transform lens.

Claim 4

The optical correlation unit of claim 1, wherein at least one of said spatial light modulators is a deformable micro-mirror device.

Claim 5

The optical correlation unit of claim 1, wherein said means for directing light is a beam splitter.

Claim 6

The optical correlation unit of claim 1, wherein each said spatial light modulator modulates light incident at its surface by adjusting the position of said reflective elements so as to change the path length of incoming light to an image plane.

Claim 7

The optical correlation unit of claim 1, wherein image data is obtained by viewing a real object, and further comprising an image capture unit for obtaining image data representing said one of said objects.

Claim 8

The optical correlation unit of claim 1, wherein said transform data is obtained by viewing a real object, and further comprising a transform image capture unit for obtaining transform image data representing one of said objects.

Claim 9

The optical correlation unit of claim 1, and further comprising a moveable stage for aligning said first object and said second object while said image data and said transform image data are captured, wherein said motion stage has a platform for moving one of said objects with respect to the other.

Claim 12

The method of claim 9, and further comprising the step of tilting said second spatial light modulator to separate said correlation image from other output data.

Claim 13

The method of claim 9, and further comprising the step of delivering data representing the correlation image and the image of one of said object to a processor and using said processor to generate a composite image.

Claim 14

The method of claim 9, wherein said image data is obtained from a real object, and further comprising the steps of capturing a video image of one of said objects and converting said image to said image data.

Claim 15

The method of claim 9, wherein said capturing step is performed in real time with respect to the rest of the correlation steps.

Claim 16

The method of claim 9, wherein said transform data is obtained from a real object and further comprising the steps of capturing a Fourier image of one of said objects and converting said image to said transform data.

Claim 17

An optical correlation system for providing a correlation image from image data representing a first object and Fourier transform image data representing a second object, comprising: an image capture unit for obtaining image data representing a first one of said objects; a transform image capture unit for obtaining transform image data representing a second one of said objects; a first phase modulating spatial light modulator, having an array of reflective elements and means for receiving said image data as electronic input to each element, which controls the phase modulation of said element; a coherent light source for illuminating the surface of said first spatial light modulator; a first Fourier transform lens for receiving light reflected from the surface of said first phase modulating spatial light modulator; a second phase modulating spatial light modulator, having an array of reflective elements and having means for receiving said transform data as electronic input to each reflective; element for controlling the phase modulation by said element, wherein said second phase modulating spatial light modulator is located at the Fourier image plane of said first Fourier transform lens; means for directing light reflected from said second spatial light modulator to a Fourier transform lens; a second Fourier transform lens for receiving said light reflected from said second spatial light modulator; and an image capture device located at the Fourier image plane of said second Fourier transform lens.

Claim 18

An optical correlation system for providing a correlation image from image data representing a first object and Fourier transform image data representing a second object, comprising: an image capture unit for obtaining image data representing a first one of said objects; a transform image capture unit for obtaining transform image data representing a second one of said objects; a first phase modulating spatial light modulator, having an array of reflective elements and means for receiving said image data as electronic input to each element, which controls the phase modulation of said element; a coherent light source for illuminating the surface of said first spatial light modulator; a first Fourier transform lens for receiving light reflected from the surface of said first phase modulating spatial light modulator; a second phase modulating spatial light modulator, having an array of reflective elements and having means for receiving said transform data as electronic input to each reflective; element for controlling the phase modulation by said element, wherein said second phase modulating spatial light modulator is located at the Fourier image plane of said first Fourier transform lens; means for directing light reflected from said second spatial light modulator to a Fourier transform lens; a second Fourier transform lens for receiving said light reflected from said second spatial light modulator; and an image capture device located at the Fourier image plane of said second Fourier transform lens.

Claim 19

The optical correlation unit of claim 15, and further comprising a moveable motion stage for aligning said first object and said second object while said image data and said transform image data are captured, wherein said motion stage has a platform for moving one of said objects with respect to the other.

Claim 20

The optical correlation unit of claim 15, wherein at least one of said spatial light modulators is a deformable micro-mirror device.

Claim 21

The optical correlation unit of claim 15, wherein said spatial light modulator modulates light incident at its surface by adjusting the position of said reflective elements so as to change the path length of incoming light to an image plane.