The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 1989
Filed:
Mar. 18, 1988
John N Driscoll, Wellesley, MA (US);
HNU Systems, Inc., Newton, MA (US);
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.