Photoelectric switch having pulse driver circuitry

Details Photoelectric switch having pulse driver circuitry Photoelectric switch having pulse driver circuitry

1990-01-22

1991-06-25

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

356141, 455618, 455613, G01J 132

Patent

active

050269780

ABSTRACT:
A light projecting circuit of a photoelectric switch includes a light projecting element (2), a driver circuit (1, 3) for driving the light projecting element by use of pulses, and a change-over switch (4) for increasing or for decreasing an amount of light emitted from the light projecting element. With this provision, in an operation to adjust optical axes, the change-over switch can be used to increase the amount of the emitted light. Consequently, the position of the projected light beam can be easily confirmed.

REFERENCES:
patent: 4621376 (1986-11-01), Namamura et al.
patent: 4733398 (1988-03-01), Shibagaki et al.
patent: 4916689 (1990-04-01), Bielinski

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