Film for correcting spatial irregularity in the gain of optical

Details Film for correcting spatial irregularity in the gain of optical Film for correcting spatial irregularity in the gain of optical

1977-10-28

1980-02-05

Henry, Jon W.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250213R, G02B 522, H01J 3150

Patent

active

041870026

ABSTRACT:
The present invention relates to a film for correcting gain irregularities occurring between the different points of optical images.
The film applied to the image is split into elementary areas of constant transparency. Within each of these areas, the transparency is adjusted by opaque parts separated by transparent parts. The product of the gain of the image by the transparency of the film is maintained constant over the whole of the area of the image. In the example, these elementary areas are squares and the opaque parts are strips of fixed width.
Application is to the image intensifier tubes of scintillography circuits.

REFERENCES:
patent: 2777359 (1957-01-01), Debrie
patent: 2886712 (1959-05-01), Schultze et al.
patent: 3149968 (1964-09-01), Stephens
patent: 3313940 (1967-04-01), Goodrich
patent: 3669540 (1972-06-01), Rattman et al.

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