Image pickup apparatus

Details Image pickup apparatus Image pickup apparatus

1996-09-24

1998-04-14

Garber, Wendy

Television

Camera, system and detail

Optics

348363, H04N 5232

Patent

active

057398542

ABSTRACT:
A video camera apparatus to which a lens unit is detachably mounted includes a camera unit having an exposure control circuit for producing an exposure control signal from an image pickup signal and transmitting it to an utilization device, a lens unit used as the utilization device and having an iris control circuit for producing an iris control signal based on the exposure control signal provided by the exposure control circuit and a signal indicative of diaphragm condition of an iris, and a data communication channel for communicating a plurality of signals including the exposure control signal in a given cycle between the camera unit and the lens unit. The iris control circuit is so arranged as to control the iris by use of the iris control signal obtained by dividing the exposure control signal transmitted from the camera unit into a given number of times within a one communication duration.

REFERENCES:
patent: 4037254 (1977-07-01), Monahan
patent: 4190864 (1980-02-01), Dischert
patent: 4959728 (1990-09-01), Takahashi et al.
patent: 5168365 (1992-12-01), Kawahara
patent: 5325149 (1994-06-01), Kawahara

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