Mechanical vibrator for light beam chopper

Details Mechanical vibrator for light beam chopper Mechanical vibrator for light beam chopper

1981-02-24

1983-11-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

350269, G01D 536

Patent

active

044131798

ABSTRACT:
A tuning fork type vibrator for an optical chopper in a photosensor, which vibrator oscillates at a single frequency. The vibrator comprises vibrating plates so disposed as to face each other with a predetermined spacing therebetween, and a stem portion obtained by bonding together bent portions located at one end of each of said vibrating plates.

REFERENCES:
patent: 3110824 (1969-11-01), Flanagan
patent: 3632192 (1972-01-01), Grib
patent: 3805190 (1974-04-01), Berlin et al.

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