Photographic spot measuring apparatus

Details Photographic spot measuring apparatus Photographic spot measuring apparatus

1980-11-21

1983-08-09

Arnold, Bruce Y.

Optics: measuring and testing

Photometers

Photoelectric

354 23R, G01J 144

Patent

active

043975534

ABSTRACT:
A photographic spot measuring device for determining a film exposure for an object relative to a film latitude and which is capable of reproducing various parts of the object with possible respective densities between a pair of density limits is disclosed. The device operates by selectively measuring the luminance of a desired part of the object within a limited acceptance angle and producing a light measuring signal in response thereto and generating a limit exposure signal to effect an exposure of the film in which the measured part of the object is reproduced on the film within the density limits.

REFERENCES:
patent: 4176955 (1979-12-01), Yamada et al.
patent: 4182573 (1980-01-01), Yamada et al.

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