Optical: systems and elements – Diffraction – Using fourier transform spatial filtering
Patent
1991-06-10
1992-08-11
Berman, Jack I.
Optical: systems and elements
Diffraction
Using fourier transform spatial filtering
359 29, 364822, 382 31, 382 42, G02B 2746
Patent
active
051384892
ABSTRACT:
An incoherent holographic correlator comprising a two-dimensional array of surface-emitting lasers which are selectable in an arbitrary pattern so as to emit a beam containing the pattern. The pattern is spatially incoherent because the lasers are not phase-locked but it is temporally coherent. The beams are collimated onto a recorded hologram, and each of the beams produces a diffracted beam from the recording. All the diffracted beams are focused onto an imaging plane. A high-intensity spot represents a strong correlation between the selected pattern on the laser array and the image previously recorded in the hologram.
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Bell Communiations Research, Inc.
Berman Jack I.
Guenzer Charles S.
Suchyta Leonard Charles
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