Patent
1988-11-30
1990-08-21
Adams, Russell E.
354443, G03B 708
Patent
active
049510827
ABSTRACT:
A three-dimensional multi-pattern photo-metering apparatus for photo-metering a plurality of areas into which a field is divided, comprises a photo-metering device for photo-metering the plurality of areas into which the field is divided and for producing a plurality of photometric outputs corresponding to brightness of the respective divided areas, an output device for outputting field information regarding at least one of an object distance, a focal length of a camera lens, a pupil position of the camera lens and a photographic time, a device for providing a plurality of discrete methods for producing reference information representative of the brightness of the areas in the field, and a device for selecting one of the plurality of methods on the basis of first and second discrete parameters regarding the photometric outputs and a third parameter regarding the field information and for producing the reference information in accordance with the selected method on the basis of the photometric outputs.
REFERENCES:
patent: 4412730 (1983-11-01), Saegusa et al.
patent: 4754299 (1988-06-01), Saegusa
patent: 4767668 (1988-09-01), Ishikawa et al.
patent: 4821074 (1987-04-01), Nakai et al.
Adams Russell E.
Nikon Corporation
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