Photometry device that detects and compensates for an inversion

Details Photometry device that detects and compensates for an inversion Photometry device that detects and compensates for an inversion

1997-02-18

1999-10-05

Garber, Wendy

Television

Camera, system and detail

Solid-state image sensor

396234, H04N 314, H04N 5335, G03B 708

Patent

active

059632526

ABSTRACT:
A photometric circuit performs photometry on an object field using an accumulating photometric element, such as, for example, a CCD. An accumulation controller controls the photometric circuit. An abnormality sensor determines whether an abnormality, such as, for example, the inversion effect of the photometric output of the photometric circuit has occurred. The accumulation controller sets the accumulation time of the photometric element for the next round of photometry to a minimum value, for example, when it has been determined by the abnormality sensor that an abnormality has occurred. This allows the photometric circuit to return to normal operation as quickly as possible.

REFERENCES:
patent: 4479062 (1984-10-01), Kawasaki et al.
patent: 4544848 (1985-10-01), Kawasaki et al.
patent: 4791446 (1988-12-01), Ishida et al.
patent: 5450163 (1995-09-01), Iwasaki

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