Displacement detecting device with integral optics

Details Displacement detecting device with integral optics Displacement detecting device with integral optics

1992-12-17

1994-02-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25023116, H01J 314

Patent

active

052834344

ABSTRACT:
Disclosed is a displacement detecting device for measuring displacement or velocity of an object. The device is provided with a casing having an optical window, a light-emitting element and a light-receiving element incorporated in the casing, a transparent plate member provided in the vicinity of the window, a first optical function element provided on the transparent plate member for splitting the light generated by the light-emitting element into plural light beams emitted therefrom, and a second optical function element provided on the transparent plate member for guiding the lights to the light-receiving element, the lights being modulated when the emitted light beams are irradiated onto a relatively displacing object.

REFERENCES:
patent: 4176276 (1979-11-01), Kaul et al.
patent: 4766310 (1988-08-01), Michel
patent: 4998798 (1991-03-01), Ishizuka et al.

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