Quadrant detection system

Details Quadrant detection system Quadrant detection system

1973-06-08

1980-01-29

Buczinski, S. C.

Optics: measuring and testing

Angle measuring or angular axial alignment

Apex of angle at observing or detecting station

350 372, 350162ZP, 356152, G01B 1126, G02B 518

Patent

active

041859197

ABSTRACT:
A quadrant detection system having an objective lens and a holographic lens positioned at the back focal plane of the objective lens. Four photoelectric detectors are positioned on the side of the holographic lens remote from the objective lens. The holographic lens has lens elements in four quadrants with each quadrant having a focal point corresponding to the position of the photoelectric detectors.

REFERENCES:
patent: 3375750 (1968-04-01), Ellis et al.
patent: 3701602 (1972-10-01), Bergin et al.
Sincerbox, IBM Tech. Discl. Bulletin, 8-1967, pp. 267, 268.

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