Characteristics and Applications of Concentrated-Arc Lamps

The concentrated-arc lamp is an arc lamp provided with permanent electrodes which are sealed into an argon-filled glass envelope. The light source is a sharply defined luminous disk on the end of a specially prepared zirconium oxide cathode. The radiation has a gray body distribution with the superimposed atomic spectra of zirconium and argon. In the various sizes of lamps new made the light-emitting spot ranges from 40 to 100 candles per sq mm in brightness and from 0.003 to 0.06 in. in diameter. — Small-sized lamps furnish a close approach to a point source and have application in optical testing and demonstrating. Medium-sized lamps make increased detail rendition and depth of focus possible in microscopy and the photographic enlarger. Large-sized lamps are a pplicable in the field of projection.

Print ISSN

0097-5834

Published

1946-11

Content type

Original Research

DOI

10.5594/J12764