Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1996-12-04
1999-10-05
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250229, 396144, G01J 132
Patent
active
059628413
ABSTRACT:
A detecting mechanism has a sensor for detecting different levels of transmissivity to provide an output signal representative of the transmissivity level detected. The detecting mechanism is provided with circuitry for changing its sensitivity.
REFERENCES:
patent: 4774494 (1988-09-01), Extance et al.
patent: 4929822 (1990-05-01), Nakamura et al.
patent: 4937441 (1990-06-01), Ishizawa et al.
patent: 5365301 (1994-11-01), Sugita et al.
Maruyama Atsushi
Nagai Michio
Okumura Yoichiro
Terada Hiroshi
Olympus Optical Co,. Ltd.
Pyo Kevin
Weinstein Louis
Westin Edward P.
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