Compact optical processor

Details Compact optical processor Compact optical processor

1992-01-14

1993-05-04

Arnold, Bruce Y.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

2502081, 385129, 364822, G02B 532

Patent

active

052086852

ABSTRACT:
This invention is a compact optical processor including a coherent light source, plural optical elements that together form a Fourier transform interferometer, and a two dimensional detector array. The light source generates a two dimensional input optical wavefront intensity modulated according to the input signal. The optical elements are formed as slab-like members with parallel input and output surfaces. These optical elements are disposed abutting in tandem. The light detecting device includes a two dimensional array of photosensitive elements generating an image signal corresponding to the processed two dimensional optical wavefront. The plural optical elements preferably include at least one acousto-optical element forming a two dimensional scanner. The plural optical elements may further includes a holographic optical element to block light undiffracted by the scanning elements. The plurality of optical elements may include a modified Kosters interferometer with a beam splitter and two orthogonally disposed roof prisms. The optical processor may operate on plural input signals on separate wavelengths employing sets dichroic beam splitters to assemble and separate plural wavelengths from separate point sources.

REFERENCES:
patent: 4270047 (1981-05-01), Mochizuki et al.
patent: 4551629 (1985-11-01), Carson et al.
patent: 4737621 (1988-04-01), Gonsiorowski et al.
patent: 4919536 (1990-04-01), Komine
patent: 5144636 (1992-09-01), Yoshida et al.
"10th International Computing Conference", Optical-Hybrid Backprojection Processes, pp. 89-95.
"Design of High-Numerical-Aperture Holographic Gratings for Integrated Optics Readout Heads", Holographic Optics: Design and Application, pp. 188-193.
"Real-Time Programmable Acoustooptic Synthetic Aperture Radar Processor", Applied Optics, pp. 1786-1796.
"Comparison of Hybrid-Optical and Digital Computers for Real-Time 2-D Fourier Transform Based Operations", Real-Time Signal Processing for Industrial Applications, Jun. 1988.
"Compact Real-Time Interferometric Fourier Transform Processors", Optical Information-Processing and Systems Architecture II, Dec. 1990.

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