Format for color diffractive subtractive filters

Details Format for color diffractive subtractive filters Format for color diffractive subtractive filters

1977-04-14

1978-06-13

Stern, Ronald J.

Optics: motion pictures

Removable film strip magazine type

352233, 352238, 352239, 428 29, G02B 518, G03C 176

Patent

active

040945847

ABSTRACT:
Each one of three filters, corresponding to different primary subtractive colors of a color picture, is embossed as a relief pattern on the same side of a plastic film within a separate one of any three of four side-by-side regions into which the film is divided. This permits the film to be thrice-folded to both (1) superimpose the three filters substantially in registration with each other and (2) place the embossed side of the film within the interior of the thrice-folded film where said filters are protected.

REFERENCES:
patent: 3619024 (1971-11-01), Frattarola
patent: 3790245 (1974-02-01), Hannan et al.
patent: 3957354 (1976-05-01), Knop
patent: 4057326 (1977-11-01), Knop

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