Passive optical rangefinder

Details Passive optical rangefinder Passive optical rangefinder

1975-02-12

1977-03-01

Hubler, Malcolm F.

Optics: measuring and testing

Range or remote distance finding

With photodetection

178DIG36, 356 4, 356146, G01C 300

Patent

active

040099601

ABSTRACT:
The present invention provides within a ship, a passive electro-optic dev for providing a measurement of the range, together with a positively identifiable image of an approaching ship or object day or night on a CRT, with the range displayed digitally on the CRT. The rangefinder capability provides a substitute or supplement to radar or active-gated laser beam rangefinders for collision avoidance and station-keeping.

REFERENCES:
patent: 3227033 (1966-01-01), Whyte
patent: 3781467 (1973-12-01), Soames
patent: 3895870 (1975-07-01), Cullen et al.

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