Discharge lamp
AssigneeUshio Denki Kabushiki Kaisha
InventorsYuichi Sasaki, Takumi Yamane
Life of this patent
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Abstract
A discharge lamp includes a discharge vessel. A xenon gas is sealed within the discharge vessel so as to serve as a light emitting gas, the discharge vessel is made from quartz glass, a pair of electrodes are arranged so as to face each other in the discharge vessel, and the discharge vessel has a chip portion. The chip portion is made from a glass member that has a composition different from that of the discharge vessel, and the glass member has a transmittance of 50% or more over a wavelength range from 170 nm to 300 nm.
Claims6
A discharge lamp for use with a projector or a general illumination device, the discharge lamp comprising a discharge vessel such that a xenon gas is sealed within the discharge vessel so as to serve as a light emitting gas, the discharge vessel being made from quartz glass, a pair of electrodes being arranged so as to face each other in the discharge vessel, and the discharge vessel having a chip portion and a light emitting part,
- the chip portion being disposed on an outer peripheral surface of the light emitting part of the discharge vessel, and made from a glass member that has a composition different from the discharge vessel, and the glass member of the chip portion having a transmittance of 50% or more over an entire wavelength range from 170 nm to 300 nm.
Dependencies are inferred from the claim text.