Discharge lamp device

Details Discharge lamp device Discharge lamp device

2005-05-17

2005-05-17

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

With envelope

Having base and connector

C313S318100

Reexamination Certificate

active

06894429

ABSTRACT:
In a discharge lamp device, the arc tube body is configured by welding and integrating shroud glass with an arc tube so as to enclose a discharging portion, and a rearward elongating portion of the arc tube that elongates in the rear of the shroud glass is inserted and held into an opening of an insulating plug which is made of synthetic resin. A UV blocking film is formed on the outer surface of the rearward elongating portion of the arc tube. UV components of leakage light from the rearward elongating portion are cut off, and the amount of ultraviolet rays to which the resin layer in the opening is exposed is reduced. The UV blocking film is in the opening, and hence cannot be seen through a front lens.

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