3708231 is referenced by 69 patents and cites 7 patents.

A device for the precision measuring of angular movements. The device incorporates an optical lever utilizing a predetermined number of reflections to increase the displacement of a light beam to be read out by discrete sensors. Ambiguities resulting from the amplification of displacement are resolved by determining displacement at a plurality of points of reflection and by using periodic logic on the sensor outputs.

Precision angle measuring device
Application Number
Publication Number
Application Date
November 10, 1969
Publication Date
January 2, 1973
Walters Glenn A
G01b 11/26
G01D 05/26
G01D 05/30
G01C 09/04
G01C 09/00
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