A Continuous Optical Reduction Sound Printer

O. Sandvik, J. G. Streiffert

A continuous optical reduction sound printer is described, which prints by optical means from standard 35-mm. film to standard 16-mm. sound-film. Since the longitudinal reduction of the sound-track is greater than the lateral reduction, an anamorphote optical system is required. In the present case this optical system consists of a combination of spherical and cylindrical lens elements. Data are given which show the change in the frequency characteristic of the 16-mm. sound print as a function of the 35-mm. negative shrinkage.

Print ISSN
Published
1935-08
Content type
Original Research
DOI
10.5594/J05384