Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1992-09-11
1994-07-19
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25023114, G01D 534
Patent
active
053311540
ABSTRACT:
In an image sensing apparatus having a solid-state image sensor provided with an antiblooming gate and an electronic flash device, a clock signal generating circuit is arranged to apply to the gate a clock signal at a given frequency during the flashing period of the flash device and at a lower frequency than the given frequency during a period immediately before the flashing period and a period after completion of flashing by the flash device. The device includes a rotary encloder with light transmitting, blocking and semi-transmitting sections. The position of the encoder is used in an exposure means for controlling an exposure condition of a photoconverting member.
REFERENCES:
patent: 2901170 (1959-08-01), Poole
patent: 4866268 (1989-09-01), Tang et al.
patent: 4866269 (1989-09-01), Wlodarczyk et al.
patent: 4972078 (1990-11-01), Hasebe et al.
patent: 5021735 (1991-06-01), Maass et al.
Kondo Kenichi
Kudo Toshihiko
Matsunaga Kazuhiro
Sakaegi Yuji
Takayama Tsutomu
Canon Kabushiki Kaisha
Nelms David C.
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