Electric incandescent lamp and method of manufacturing this lamp.

摘要

The electric incandescent lamp has a lamp (1) of high-silica glass having an addition of a colouring agent throughout the lamp vessel. Thus the emission of unwanted radiation is minimized. The lamp can be made by using a glass body of glass containing a precursor of the colouring agent as an additive, as the glass body from which the lamp vessel is formed. After completing the lamp structurally, the precursor is converted into the colouring agent by a heat treatment.