Posted 2 years ago
Heres something cool and interesting....not sure how to use it but sure is interesting. Found it at a hoarders house, that was full of photography and projection equipment. Found this detail about it on a website
"This photoelectric colorimeter was designed by W. H. Summerson of Cornell University and introduced around 1939. The instrument includes an internal galvanometer and potentiometer; this specific model is designed for general colorimetric determinations.
Colorimeters are used to match and measure colors. They rely on psychophysical characteristics like hue or tint, color saturation or purity, and brightness. Photoelectric colorimeters use photocells, color filters, and amplifiers in order to provide precise determinations of color."