Apparatus for determining the angular position of a target illuminated by light pulses
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United States of America Patent
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Jul 26, 1983
Grant Date -
N/A
app pub date -
Feb 20, 1981
filing date -
Feb 20, 1980
priority date (Note) -
Expired
status (Latency Note)
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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.
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