The Optics of Sound Recording Systems

THIS paper is concerned with the optical systems employed in the recording of sound on motion picture film. Since it would obviously be impossible to give in one short article all the optical information necessary for the design of a completely satisfactory recording or reproducing system, the scope of this paper has been limited to the light-gathering characteristics of the various well-known systems. This phase of the problem does not often receive sufficient consideration. In fact, the photometry of optical systems in general falls somewhere between the field of interest of the lens designer and that of the illuminating engineer. The former is primarily interested in the perfection of the image formed by the optical system and uses geometrical methods almost exclusively. The latter, on the other hand, although more likely to approach the problem from the standpoint of physical optics, is handicapped in these considerations by an unwieldy system of units.

Print ISSN

0096-6460

Published

1928-09

Content type

Original Research

DOI

10.5594/J13134