Patent ID: 6550934
Filing Date: 2003-04-22
Classification: H01J,H01S

Abstract:
A light emitting device comprising:an elongated lamp defining a central axis and including a first hollow tube concentric with said central axis, containing a gas therein and producing irradiation responsive to electrical input; an elongated, light transmissive, fluorescent or phosphorescent optical element having at least a portion disposed within said lamp and at least one end extending outside said lamp from an end of said lamp, said central axis extending through said optical element over the entire length of said optical element, said optical element emitting fluorescent or phosphorescent light upon being excited by said irradiation and transmitting said light to said one end; and a transparent second hollow tube sealed to, concentric with and extending through said first tube for supporting said optical element therewithin, said sealed first and second tubes together forming an envelope containing said gas.