Apparatus for determining the angular position of a target illum

Details Apparatus for determining the angular position of a target illum Apparatus for determining the angular position of a target illum

1981-02-20

1983-07-26

Buczinski, S. C.

Optics: measuring and testing

Angle measuring or angular axial alignment

With photodetection remote from measured angle

250203R, 250227, G01B 1126, G01J 120

Patent

active

043951210

ABSTRACT:
In a system for tracking a target which is illuminated by a laser beam, for example, apparatus is required to determine how far the target is off-axis. The apparatus includes an objective lens (3) which concentrates light coming from the target onto a reception surface (8). A group (12) of bundles (13,14,15,16) of optical wave guides is disposed between the reception surface (8) and a single photoelectric receiver (21). Each bundle conveys light from a respective portion of the reception surface. The bundles (13,14,15,16) of wave guides are of different lengths. Thus, the optical signals transmitted by the various bundles are received successively by the single receiver. This avoids problems of matching the sensitivity of different receivers responsive to different portions of the reception surface.

REFERENCES:
patent: 3802780 (1974-04-01), Helm et al.
patent: 3989942 (1976-11-01), Waddoups
patent: 3991318 (1976-11-01), Duguay
patent: 4128759 (1978-12-01), Hunt et al.

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