Solid state star scanner

Details Solid state star scanner Solid state star scanner

1975-02-27

1976-11-30

Wilbur, Maynard R.

Optics: measuring and testing

Angle measuring or angular axial alignment

With photodetection remote from measured angle

250203R, 350 6, 356141, G01B 1126

Patent

active

039946002

ABSTRACT:
A solid state optical scanner comprising a frequency generator that vibrates a sonic transducer which in turn sets up traveling waves in an acousto-optic medium. These waves form regions of compression and rarefaction in the medium causing the medium to act as a Bragg angle grating to an incident light source. Optical lenses and a photo detector are positioned behind the medium. Consequently, the light leaving the medium is diffracted into a single order and focused onto an image plane. A photodetector is placed at the image plane and the signal obtained is processed to develop information to determine the direction from the scanner to the incident light source.

REFERENCES:
patent: 3055258 (1962-09-01), Hurvitz
patent: 3531184 (1970-09-01), Adler
patent: 3661441 (1972-05-01), Uchida et al.
patent: 3799652 (1974-03-01), Torguet

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