Accession Number : AD0869494

Title :   Image Definition Device.

Descriptive Note : Final rept. 10 Apr 69-10 Jan 70,

Corporate Author : TECHNICAL OPERATIONS INC BURLINGTON MA

Personal Author(s) : Justh, Bruce

Report Date : APR 1970

Pagination or Media Count : 39

Abstract : An image definition device for the stereo-viewing of photographic transparencies was designed and constructed. This instrument utilizes both light-table and condenser illumination interchangeably. As a result of effects associated with the scattering properties of photographic grains, the use of condenser illumination provides significantly higher viewing contrast. In designing the condenser, the effects of partial coherence, flare, and dark-field illumination were also considered. (Author)

Descriptors :   *STEREOSCOPIC DISPLAY SYSTEMS), (*AERIAL PHOTOGRAPHS, PHOTOINTERPRETATION, AERIAL RECONNAISSANCE, PHOTOGRAPHIC IMAGES, MICROSCOPES, ILLUMINATION, PHOTOGRAPHIC GRAIN.

Subject Categories : Cartography and Aerial Photography

Distribution Statement : APPROVED FOR PUBLIC RELEASE