Variable color-output strobe for photographic apparatus

Details Variable color-output strobe for photographic apparatus Variable color-output strobe for photographic apparatus

1990-09-21

1992-04-28

Adams, Russell E.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Plural load device systems

354132, 354430, 315358, G03B 1505

Patent

active

051092484

ABSTRACT:
A single flash discharge tube system is provided that is capable of emitting artificial light of a controlled and variable spectral output to compensate for photographic film color variations and/or extremes in scene color temperature. The flash tube contains a mixture of two or more gasses with each gas in the tube having a different ionization potential. When ionized, each gas or combination thereof produces light having a different spectral output. The ionization of each gas is controlled by a trigger voltage applied to the flash tube in accordance with a code on a film container indicative of the color balance of film contained therein and/or sensing apparatus that determines scene color temperature.

REFERENCES:
patent: 2277697 (1942-03-01), Grier
patent: 3468228 (1969-09-01), Rogers
patent: 3942183 (1976-03-01), Whiteside
patent: 4199244 (1980-04-01), Shenk
patent: 4199246 (1980-04-01), Muggli
patent: 4329411 (1982-05-01), Land
patent: 4485336 (1984-11-01), Yoshiyama et al.
patent: 4598229 (1986-07-01), Henning et al.
patent: 4736215 (1988-04-01), Hudspeth et al.
patent: 4853600 (1989-08-01), Zeltner et al.
patent: 4978892 (1990-12-01), Petrakos et al.

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