Carbon Arc Characteristics that Determine Motion Picture Screen Light

In a carbon are motion picture projector, definite relations exist between screen light on the one hand, and the are current, current density, carbon size and the speed and collection angle of the projector optical system on the other. Measurements on more than 100 standard and experimental carbon arcs, with carbons ranging in size from 9 mm to 16 mm, have provided data to establish these relationships. Conditions are defined which are of importance in the matching of an optical system to a given are, or vice versa, and for obtaining optimum performance in any situation involving screen distribution, amount of light and preferred current.

Print ISSN

0898-042X

Published

1951-03

Content type

Original Research

DOI

10.5594/J05075