Photoflash filter

Details Photoflash filter Photoflash filter

1974-07-26

1976-09-07

Braun, Fred L.

Buckles, buttons, clasps, etc.

350 1, G03B 1502

Patent

active

039795837

ABSTRACT:
Illumination from a photoflash lamp is limited to radiation useful for photographic exposure by providing the photoflash lamp with an infrared absorbing filter possessing photographically desirable transmission properties in the visible region of the spectrum.

REFERENCES:
patent: 2747076 (1956-05-01), Eloranta
patent: 2979601 (1961-04-01), Mc Clees
patent: 3127111 (1964-03-01), Baring
patent: 3177354 (1965-04-01), Appleton
patent: 3255342 (1966-06-01), Seitz et al.
patent: 3588216 (1971-06-01), Bloom
patent: 3725692 (1973-04-01), Miller et al.
patent: 3806462 (1974-04-01), Bloom

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