Apparatus for performing exposure control pertaining to the lumi

Details Apparatus for performing exposure control pertaining to the lumi Apparatus for performing exposure control pertaining to the lumi

1995-05-16

1996-09-24

Garber, Wendy

Television

Camera, system and detail

Optics

348229, 348363, H04N 5238

Patent

active

055595553

ABSTRACT:
An exposing apparatus comprises: a lens group to fetch a light from an object; an iris to adjust a light amount from the lens group; an image pickup device to convert the light which passed through the iris into the electric signal; a detecting circuit to detect a luminance signal level from an output signal from the image pickup device; a reference level signal setting circuit to set an exposure control reference value to control the iris; an exposure control reference value modulating circuit to modulate the exposure control reference value when the iris is controlled; and a control circuit to set the exposure control reference value in correspondence to the luminance signal level when an output level of the detecting circuit is larger than a set value.

REFERENCES:
patent: 5258848 (1993-11-01), Kondo et al.
patent: 5386231 (1995-01-01), Shimizu et al.

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