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Abstract
A simple optical attachment has been used to convert a transmission micradensitometer into a reflexion instrument. The sharpness of images contained in gelatin and in optical contact with a diffusing surface was found to be limited by the effect of multiple internal reflex ions in the gelatin layer. Some of the factors affecting the sharpness of reflected black-and-white and colour images are discussed, and oy correcting for the instrument response functions, the results are related to the sharpness of the corresponding negative films.
Notes
Paper presented at a Symposium on “Quality of Photographic Reproduction”, organized by the Scientific and Technicol Group on 6 December 1962, in Landon.