Detector apparatus for detecing coherent monohromatic point-sour

Details Detector apparatus for detecing coherent monohromatic point-sour Detector apparatus for detecing coherent monohromatic point-sour

1985-02-13

1993-08-10

Buczinski, Stephen C.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356352, 356346, 356374, G01B 902, G01B 1114

Patent

active

052354059

ABSTRACT:
Detector apparatus includes a dispersive prism (10) and a diffraction grating (11) of the type which produces only zero and first order diffraction patterns. Located behind the diffraction grating (11) so as to interact with the first harmonic content of the diffraction patterns is a Moire grating (12) having half the pitch of the diffraction grating (11). Detector means including at least two pairs of detectors (13-16) is located behind the Moire grating (12) to detect the presence of Moire fringes.

REFERENCES:
patent: 4222667 (1980-09-01), Layne
patent: 4242000 (1980-12-01), Bergkvist
patent: 4309108 (1982-01-01), Siebert
patent: 4355898 (1982-10-01), Dakin
patent: 4515478 (1985-05-01), Ballard et al.
H. A. Hill et al., Appl Optics, vol. 16, No. 1, Jan. 1977, p. 195.
K. Patorski et al., Appl. Optics, vol. 15, No. 5, May 1976, p. 1234.

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