Optical encoder apparatus

Details Optical encoder apparatus Optical encoder apparatus

1978-06-26

1980-02-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250239, G01D 534

Patent

active

041907671

ABSTRACT:
Disclosed is an encoder assembly employing a single radiant energy source mounted oppositely disposed from two sensors. A shutter having two distinct leading edges is mounted for movement between the source and the sensors. One edge is aligned to interrupt the optical path between the source and one sensor and the other edge is aligned to interrupt the path between the source and the other sensor. The housing for mounting the sensors includes narrow optical apertures to provide sharp signal cut-off and widened slots below the apertures to prevent wicking of potting material into the optical apertures.

REFERENCES:
patent: 3234394 (1966-02-01), Worden
patent: 3702070 (1972-11-01), Gartner

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