The Microdensitometer as a Laboratory Measuring Tool

W. R. Goehner

The microdensitometer is extensively used in studying a variety of problems of sound-film recording and reproducing: in studying the operating characteristics of light-modulating devices; in plotting variations of light transmission of sound-tracks in respect to the harmonic content of film records; in establishing correct operating technic in film processing; in studying the photographic characteristics of film as regards its ability to record high frequencies; and many other aspects of sound recording and reproducing. — The commercially available microdensitometers are not well suited to making such studies unless proper means are taken to assure correct comparisons with data obtained with a calibrated reproducer. The present paper describes the modifications of a Moll microdensitometer that have converted it into a satisfactory instrument for sound-picture investigations.

Print ISSN
Published
1934-12
Content type
Original Research
DOI
10.5594/J08750