Optical transducer with a transparent shutter disk

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system

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250237G, G01D 534

Patent

active

045366500

ABSTRACT:
An optical transducer for detecting the angular position of a rotary member with respect to a fixed structure, which comprises a shutter disc of transparent material, having two faces which are parallel to each other. The disc is provided with a plurality of radial shutter elements, spaced by elements which transmit the light. The shutter elements are formed by V-shaped elements provided on one face of the disc and capable of totally deflecting the light incident thereon.

REFERENCES:
patent: 3714491 (1973-01-01), McIntyre et al.
patent: 4221963 (1980-09-01), Fushimi
patent: 4436398 (1984-03-01), Endo et al.

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