Method of and apparatus for altering sensitivity of photometer t

Details Method of and apparatus for altering sensitivity of photometer t Method of and apparatus for altering sensitivity of photometer t

1983-04-04

1984-12-04

Gellner, Michael L.

354481, G03B 708

Patent

active

044860870

ABSTRACT:
There are disclosed method of and apparatus for evaluating radiation in the scene. The evaluating apparatus includes a photoresponsive arrangement having a given angular directional response and a plurality of lenses respectively mounted for movement between a first position in optically operative alignment with the photosensitive arrangement for altering the given angular directional response thereof, and a second position out of the operative alignment.

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"What Do Through-Lens Meters Really Measure??", pp. 78-82, by H. Kimata and K. Werner (unable to locate magazine title or date published).

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