Electric lamp and discharge devices – With optical device or special ray transmissive envelope – Polarizer or special ray transmission
Patent
1988-03-18
1989-01-31
DeMeo, Palmer C.
Electric lamp and discharge devices
With optical device or special ray transmissive envelope
Polarizer or special ray transmission
313574, 313576, 313611, 313619, H01J 61067, H01J 6110, H01J 6140
Patent
active
048018414
ABSTRACT:
A gas discharge lamp for emitting vacuum UV radiation, comprising a lamp body filled at low pressure with a gas capable of emitting radiation in the vacuum UV range (e.g., argon), electrodes within the lamp body for passing an electric field across the gas, a crystalline window (e.g., lithium fluoride) in the body for transmitting the vacuum UV radiation emitted by the gas, wherein the crystalline window is constructed of a material that, when exposed to the vacuum UV radiation emitted by the gas, forms color centers that block transmission of the radiation through the window, and a bleaching element located within the lamp body for emitting color-center bleaching radiation in response to the electric field degrading emission of the vacuum UV radiation, the bleaching radiation being in a frequency band (e.g., 5-6 eV) lower than the vacuum UV radiation.
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patent: 3374383 (1968-03-01), Bergen et al.
patent: 4199703 (1980-04-01), Samson
Warneck, Peter, "LiF Color-Center Formation and uv Transmission Losses from Argon and Hydrogen Discharges", Journal of the Optical Society of America, Aug. 1965, vol. 55, No. 8, pp. 921-925.
Kittel, Charles, "Introduction to Solid State Physics", Wiley, 2 ed., pp. 491-497.
Samson, J. A. R., "Crystalline Materials", Tech. Vac. U.V. Spectroscopy, pp. 183-184, chapter 6, (Filter and Window Materials), Wiley, New York, 1967.
Warneck, Peter, "A Microwave-Powered Hydrogen Lamp for Vacuum Ultraviolet Photochemical Research", Applied Optics, Nov. 1962, vol. 1, No. 6, pp. 721-726.
Laufer, A. H. and McNesby, J. R., "Photolysis of Ethane at the Argon Resonance Lines 1067 and 1048A", J. Chem. Phys., p. 3329.
Lane, Arthur L. and Kuppermann, Aron, "Argon Resonance Line Lamp for Vacuum Ultraviolet Photochemistry", pp. 126-127.
McNesby, J. et al., 1971, pp. 548-551, "Vacuum Ultraviolet Techniques in Photochemistry".
Schneider, E. G., "The Effect of Irradiation on the Transmission of Lithium Fluoride", J. Optical Soc. America, vol. 27, pp. 72-74, (1937).
DeMeo Palmer C.
HNU Systems Inc.
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