Filter device with adjustable superimposed filters

Details Filter device with adjustable superimposed filters Filter device with adjustable superimposed filters

1975-08-08

1977-08-23

Corbin, John K.

350316, 350318, G02B 522

Patent

active

040436454

ABSTRACT:
A device adapted to be associated with a color picture projector for either still or motion pictures for correcting color deficiencies in the projected light beam in which the beam is noticably dominant in a color such as red as in a transparency that has "gone red", the device comprising a plurality of light transparent filters each of a color complementary to the dominant color and means for mounting these filters in superimposed relationship for arcuate movement from and to light intercepting position with varying degrees of overlap to provide varying amounts of the filtering depending upon the intensity of the color that is being corrected.

REFERENCES:
patent: 562642 (1896-06-01), McDonough
patent: 2009145 (1935-07-01), Nathan
patent: 2059361 (1936-11-01), Kenworthy
patent: 2991692 (1961-07-01), Korf
patent: 3028483 (1962-04-01), Simmon
patent: 3077140 (1963-02-01), Simmon et al.
patent: 3883243 (1975-05-01), Weisglass et al.

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