A Scattered Light Imaging System

K. Murray

doi:10.1117/12.959274

23 December 1980 A Scattered Light Imaging System

K. Murray

Proceedings Volume 0242, Long Focal Length, High Altitude Standoff Reconnaissance; (1980) https://doi.org/10.1117/12.959274
Event: 24th Annual Technical Symposium, 1980, San Diego, United States

Abstract

The hours during which useful photo-reconnaissance can be carried out are limited by the speed of the film on which the images are recorded. The capability of recovering information from photographic negatives which have been severely underexposed would significantly extend that limitation. This paper describes a system for imaging information contained in an ultra thin (i.e., severely underexposed) negative by means of light that is scattered by the individual particles comprising that information. Density vs. exposure curves displaying the behavior of the system are presented. Examples are given showing that the use of this scattered light system together with common metal toning enabled the recovery of information from photographic film underexposed as much as six "f" stops.

Citation Download Citation

K. Murray "A Scattered Light Imaging System", Proc. SPIE 0242, Long Focal Length, High Altitude Standoff Reconnaissance, (23 December 1980); https://doi.org/10.1117/12.959274

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