US 2011/0298366 A1 · HIGH INTENSITY DISCHARGE ARC TUBE AND ASSOCIATED LAMP ASSEMBLY

Abstract

The discharge light source includes an arc tube with a discharge chamber having a predetermined location for a metal halide dose or salt pool that minimizes the impact on the light emitted from the light source. The discharge chamber is preferably asymmetric about a second axis that is perpendicular to a longitudinal axis. In one embodiment, the discharge chamber preferably includes first and second generally spheroidal portions of different diameters spaced along the longitudinal axis. The arc tube has different wall thicknesses in yet another arrangement. In a further exemplary embodiment, a portion of a wall that forms the discharge chamber includes a generally concave surface. These features may be used individually or in combination.

Claims23

Dependent claims

A discharge light source comprising:

an arc tube having a longitudinal axis and a discharge chamber formed therein;
first and second electrodes having inner terminal ends spaced from one another along the longitudinal axis and each electrode extending at least partially into the discharge chamber;
and
the discharge chamber being asymmetric about a second axis perpendicular to the longitudinal axis.

1 more element

Dependencies are inferred from the claim text.

High intensity discharge arc tube and associated lamp assembly

Life of this patent

High intensity discharge arc tube and associated lamp assembly

Life of this patent

Abstract

Claims23