Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1983-11-07
2000-08-29
Moskowitz, Nelson
Optics: measuring and testing
By particle light scattering
With photocell detection
356318, 356353, 356363, G01B 902
Patent
active
061116440
ABSTRACT:
Incoming optical radiation is divided into two focused beams with a relatively large amount of delay and shift introduced between the beams. Through the focusing of each of the beams to a different focal point (F1), (F2) a lead is created such that a circular or bull's-eye fringe pattern (60) is formed in a plane of observation (45). The position of the fringe pattern with respect to the output optical axis of the device is a function of the angle (.theta.) of the incoming coherent radiation with respect to the input optical axis of the device. The spacing of the fringe rings is a function of the frequency of the coherent radiation and the intensity of the fringe pattern is a function of the intensity and coherency of the beam of coherent radiation. The interferometer of the invention has a wide angle of reception and no moving parts.
REFERENCES:
patent: 3824018 (1974-07-01), Crane
patent: 3950103 (1976-04-01), Weinmar
patent: 4170416 (1979-10-01), Fencil
patent: 4172663 (1979-10-01), Byer et al.
patent: 4173442 (1979-11-01), Snyder
patent: 4213706 (1980-07-01), Hill et al.
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patent: 4265539 (1981-05-01), Gafford
patent: 4304464 (1981-12-01), Hill et al.
patent: 4310245 (1982-01-01), Pritchard
Crane, "Laser Detection by Coherence Discrimination", Apr. 1979, pp. 212-217, Opt Engin., vol. 18, #2.
Crane, "The Angle Scanned Interferometers," Apr. 1979, pp. 205-211, Opt. Engin., vol.18, #2.
Steed, "Field Widened Interferometry at . . . (USU)", 1979, pp. 2-13, SPIB, vol. 191, 356/346.
Hartman, "Multisensor Warning Receiver . . . ", May 1979, pp. 79-85, Defense Electronics.
Moskowitz Nelson
Veridian Engineering, Inc.
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