Electric lamp and discharge devices: systems – Discharge device load – Plural gases or vapors in the discharge device
Patent
1988-12-27
1990-12-18
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Discharge device load
Plural gases or vapors in the discharge device
313637, 313643, H01J 6116
Patent
active
049788922
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 has 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.
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Gaewsky John P.
Petrakos Stephanie
Kelleher John J.
LaRoche Eugene R.
Polaroid Corporation
Yoo Do Hyun
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