Photoelectric displacement measuring device for obtaining harmon

Details Photoelectric displacement measuring device for obtaining harmon Photoelectric displacement measuring device for obtaining harmon

1987-05-08

1988-11-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231SE, H01J 314, H01J 516

Patent

active

047822295

ABSTRACT:
A photoelectric measuring system for detecting an oscillation pattern produced by a light measuring apparatus and generating harmonic free electrical output signals up to a predetermined band width. Any number of harmonics may be eliminated by selecting the size, shape, and position of a plurality of photoelements with respect to the oscillation pattern detected.

REFERENCES:
patent: 2886717 (1959-05-01), Williamson et al.
patent: 3951548 (1976-04-01), Westell
patent: 3961318 (1976-06-01), Farrand et al.
patent: 4430566 (1984-02-01), Searle
patent: 4595991 (1986-06-01), Spies
patent: 4602436 (1986-07-01), Ernst

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