Methods and apparatus for discriminating between the front and b
Methods for automated uniformity assessment and modification...
Microdensitometer system with micrometer resolution for...
Microscopic photometry apparatus
Optical densitometer
Optical densitometer
Photographic film blackening area measuring device
Quantitative analysis of biological materials and photogrtaphic
Radiographic imaging system quality monitor
Spot microdensitometer for spectral density analysis of film
Step tablet
System for measuring the optical density of both the background
System for recording information on photographic image density a