Nondestructive measurement of oxygen level in a tungsten-halogen incandescent bulb.

摘要

A previously unlit tungsten filament incandescent bulb (10) containing a fill gas is flashed for about one second to form a dispersion (19) of tungsten oxide particles therein. In a preferred embodiment, a laser beam (22) is passed through the dispersion (19) and the scattered light is detected to provide a measure of the oxygen content of the bulb (10).