Mercury-free ultraviolet discharge source

Details Mercury-free ultraviolet discharge source Mercury-free ultraviolet discharge source

1997-11-06

1999-02-02

Font, Frank G.

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

313485, 313487, 313572, 313577, H01J 6116

Patent

active

058669841

ABSTRACT:
A mercury-free ultraviolet (UV) discharge source includes an elongated envelope having a diameter in a preferred range from approximately 2 to 3 cm, containing a rare gas fill (xenon or krypton, including mixtures of these with other rare gases) at a pressure in a range from approximately 10 millitorr to approximately 200 millitorr and a power supply for ionizing the rare gas fill and generating a discharge current in a range from approximately 100 to approximately 500 milliamperes (mA). The UV discharge source has an efficiency and output comparable to existing mercury-based low-pressure discharge sources and is intended for use with a suitable phosphor capable of converting the UV radiation to visible light in a fluorescent lamp.

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