Patent ID: 8749138
Filing Date: 2014-06-10
Classification: H01J

Abstract:
1. In a metal halide lamp for producing mainly light of ultraviolet rays, said metal halide lamp comprising a lamp into which a rare gas and at least mercury and an iron are sealed to produce light with a high spectrum in ultraviolet rays, particularly, light with a wavelength of 350 to 380 [nm], in which said sealed iron is offered by iron iodide (FeI when a quantity of the sealed iron is expressed such that A represents a quantity of metal iron (Fe) sealed into the lamp, B represents a quantity of iron iodide (FeI the quantity A of said metal iron (Fe) falls within the range of 0.5 (B+C)≦A≦10.0 (B+C) [mol/cm the quantity (B+C) of said iron halide (FeX a ratio {C/(B+C)} of said iron bromide (FeBr