Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1991-02-26
1992-12-01
Razavi, Michael
Facsimile and static presentation processing
Facsimile
Recording apparatus
358909, 354286, H04N 5238, H04N 5225
Patent
active
051683652
ABSTRACT:
An interchangeable lens system includes a camera unit and a lens unit detachably attached to the camera unit. The camera unit includes an exposure control signal forming circuit for forming an exposure control signal for control of the state of exposure and a control reference value for the exposure control signal, and a transmitting circuit for transmitting to the lens unit the exposure control signal formed by the exposure control signal forming circuit. The lens unit includes an exposure controlling circuit for controlling the state of exposure, a receiving circuit for receiving the exposure control signal from the camera unit, an information generating circuit for generating an absolute circuit amount for the exposure controlling circuit on the basis of the exposure control signal received by the receiving circuit, and a controlling circuit for controlling the exposure controlling circuit in accordance with the absolute control amount.
REFERENCES:
patent: 4833498 (1989-05-01), Kato et al.
patent: 4855814 (1989-08-01), Shiraishi et al.
patent: 4860113 (1989-08-01), Miyamoto et al.
patent: 4959728 (1990-09-01), Takahashi et al.
patent: 4967281 (1990-10-01), Takada
Canon Kabushiki Kaisha
Greening Wendy R.
Razavi Michael
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