Mercury lamp of the short arc type

摘要

To devise a mercury lamp of the short arc type with high power in which an arc tube can be kept unfouled over a long time and the demand for an increase in the amount of radiation can be met, in a quartz arc tube, a cathode and an anode are disposed opposite one another and the arc tube is filled with mercury and a rare gas. At least argon (Ar) and/or krypton (Kr) in an amount from 1.0 to 8 atm at room temperature is added as the rare gas. The amount depends on the value of ((Wd)+E,fra 1/2+EE /R) where R is half the maximum diameter of the bulb in cm, d is the thickness of the bulb in cm, and W the input power supplied to the lamp in kW.