1954•Journal of the Society of Motion Picture and Television EngineersRequires access
A Rapid-Scanning Micro-Densitometer
W. R. J. Brown
Open publisher page 3 citations
Abstract
A simple microdensitometer is described. It is a scanning unit which may be used in conjunction with a normal microscope. An enlarged real image of a film sample is moved across a stationary slit. The image motion is provided by a rotating block of glass. An electrical signal (from a phototube behind the slit) is converted to a density signal and is presented on a cathode-ray oscilloscope Some uses of microdensitometric traces are suggested.