Optical: systems and elements – Diffraction – Using fourier transform spatial filtering
Patent
1992-08-31
1994-07-05
Sugarman, Scott J.
Optical: systems and elements
Diffraction
Using fourier transform spatial filtering
359559, 382 42, 382 43, G02B 2746, G02B 964
Patent
active
053272862
ABSTRACT:
An optical correlation unit for correlating the images of an inspection object and a reference object. The unit uses two phase modulating reflective spatial light modulators. A first spatial light modulator receives electronic input in the form of image data representing the inspection object. It modulates incoming light with this input and reflects the modulated output to a first Fourier transform lens. This lens provides the optical input to a second spatial light modulator, whose electronic input is transform data representing the complex conjugate of the Fourier transform of the reference image. The electronic input modulates the optical input, resulting in the Fourier product of the two images, which is then transformed to provide correlation data.
REFERENCES:
patent: 4659172 (1987-04-01), Cavan
patent: 4712851 (1987-12-01), Fusek et al.
patent: 4806774 (1989-02-01), Lin et al.
patent: 4811409 (1989-03-01), Cavan
patent: 5172000 (1992-12-01), Scheff et al.
patent: 5216541 (1993-06-01), Takesue et al.
Bienstock Rachelle J.
Sampsell Jeffrey B.
Collins Darryl J.
Donaldson Richard L.
Kesterson James C.
Reed Julie R.
Sugarman Scott J.
LandOfFree
Real time optical correlation system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Real time optical correlation system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Real time optical correlation system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-800360