Focus detecting device for use with cameras
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United States of America Patent
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Aug 28, 1990
Issued Date -
N/A
app pub date -
Apr 11, 1988
filing date -
Jan 10, 1983
priority date (Note) -
Expired
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Abstract
An image sensing device capable of being utilized in an automatic focus detecting system includes a pair of sets of light sensing elements that are spaced from each other. These light sensing elements can have a variable accumulation time of storing electric charges depending upon the intensity of the light level incident thereon. Since the automatic focus detection system must be managed within the parameters of photography, a first and second light measuring element is uniquely positioned adjacent each of the sets of light sensing elements. The outputs of these light measuring elements can control the charge accumulation period.
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