Scanning Losses in Reproduction

In the photographic reproduction of sound there are unavoidable losses related to the speed with which the film is moved. For high quality reproduction, these losses must be reduced to within tolerable limits. In the first place, it is not possible to lay down on the sound track a line of light which is infinitely narrow. Furthermore, it is difficult to adjust the line of light so that it is normal to the direction of travel of the film. The first of these losses results from what may be called the image width effect and the second the azimuth effect. The following discussion chiefly concerns the variable density method. It also applies to the variable area method so far as the image width effect is concerned, but does not apply strictly as regards the azimuth effect.

Print ISSN

0097-5834

Published

1930-11

Content type

Original Research

DOI

10.5594/J05604