Photodetector for generating position signals

Details Photodetector for generating position signals Photodetector for generating position signals

1983-11-02

1986-07-22

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250235, 358293, H04N 110

Patent

active

046021540

ABSTRACT:
A photodetector arrangement has an elongate, transparent light conducting member for causing light incident on a side periphery thereof to propagate axially therethrough toward an end thereof. A photosensitive device is located in the vicinity of the end of the light conducting member to produce an electric signal in response to light streamed through the end of the light conductor. A light interceptor is provided for limiting a quantity of light which is incident on a part of the light conductor adjacent to the photosensitive device to be detected by the device. Alternative to the light interceptor, the photosensitive device may include a solid state image sensor having an array of photosensitive cells disposed to receive light streamed out of a portion of the end of the light conducting member, which portion is near to the side periphery of the light conducting member on which the light is incident.

REFERENCES:
patent: 4019186 (1977-04-01), Dressen et al.

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