High Resolution CPA Study.

Abstract

Abstract : Concurrent Photon Amplification (CPA) was originally developed as a technique for increasing the effective film speed of materials for use under low light conditions. It has now been successfully adapted for use in high resolution photography. By applying CPA techniques to slow-speed high-resolution film materials, these may be used to replace conventional films so as to provide photographic collection systems with at least twice as much resolution while working in the exposure index range from 32 to 1600. Experiments conducted show that Kodak PAN-X film, with a speed of 32 and a resolution capability of approximately 80 line pairs per millimeter, can be replaced by KODAK 5069 in combination with Concurrent Photon Amplification and special processing to yield a photographic system resolution over 200 line pairs per millimeter and an effective film speed of 100 or more. In a similar fashion, Kodak TRI-X film with a speed of 400 and resolution capability of about 40 line pairs per millimeter can be replaced by a high resolution system based on Kodak 2496 film, CPA and special processing. This system provides resolution over 100 line pairs per millimeter and effective film speeds in the 800 to 1000 range. The CPA high resolution photographic system offers an additional advantage of increasing the resolution latitude, so that a given level of resolution is attained over a wider range of exposures; thereby increasing the probability of mission success. (Author)