Exposure control method and device

Details Exposure control method and device Exposure control method and device

1980-10-03

1982-12-21

Perkey, William B.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

354 60R, 250214P, G03B 708

Patent

active

043646506

ABSTRACT:
A number of light measuring elements are arranged at various portions of an image of an object focused by an objective. The light measuring elements are grouped for different zones to measure the average brightness of the image within the respective zones. The average brightness of the image is weighed and added together to calculate the brightness of the object based on which the exposure is controlled.

REFERENCES:
patent: 3790275 (1974-02-01), Huboi et al.
patent: 4075640 (1978-02-01), Ueda et al.

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