Optical filter

Details Optical filter Optical filter

1974-05-16

1976-03-09

Drummond, Douglas J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

96 84R, 96111, 156242, 260117, 350314, 427162, B29D 2700, C09H 700

Patent

active

039430197

ABSTRACT:
Optical wedge filter comprising a coloured gelatine layer on a flexible transparent support and a flexible transparent covering foil bonded the gelatine layer wherein the thickness of the coloured gelatine layer increases stepwise or continuously.

REFERENCES:
patent: 2450746 (1948-10-01), Bliss
patent: 2801188 (1957-07-01), Minsk
patent: 2916968 (1959-12-01), Jackson
patent: 3205767 (1965-09-01), Weber et al.
patent: 3236290 (1966-02-01), Lueder
patent: 3237513 (1966-03-01), Dreyfoos et al.
patent: 3354025 (1967-11-01), Aykanian et al.
patent: 3600482 (1971-08-01), Salger et al.
patent: 3746429 (1973-07-01), Spindel et al.
patent: 3819608 (1974-06-01), Yamamoto et al.

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