Illumination in Projection Printing of Motion Pictures

In projection printing of motion pictures, it is essential that the illumination in the printing plane he uniform and of high intensity. It is also desirable that the light in the negative plane be more or less diffused in order to minimize the effect of scratches and reduce contrast. Since the introduction of diffusion into an optical system is accompanied by a loss of intensity and possibly also of printing plane uniformity, experiments have been made to determine what conditions are most favorable from the points of view of uniformity and diffuseness.

Print ISSN

0097-5834

Published

1932-07

Content type

Original Research

DOI

10.5594/J05499