Accession Number : AD0697511

Title :   FUNDAMENTAL LIMITATIONS IN THE LOW LIGHT-LEVEL PERFORMANCE OF DIRECT-VIEW IMAGE-INTENSIFIER SYSTEMS,

Corporate Author : SIGNALS RESEARCH AND DEVELOPMENT ESTABLISHMENT CHRISTCHURCH (ENGLAND)

Personal Author(s) : Richards,E. A.

Report Date : APR 1969

Pagination or Media Count : 32

Abstract : To assess the improvement in visual perception of low light level events obtainable with a given image-intensifier system, one must take into account not only the prevailing photometric conditions in the field of view but also the non-ideal optical and electron-optical characteristics of the separate elements of the image-inatensifier system, and the eye. The effects of these factors on the overall perception characteristics of direct-view systems are examined, with particular reference to the limitations associated with objective lens parameters, photon-noise, contrast-transfer, image-tube photosensitivity, limiting resolution, luminance-gain and integration-time. (Author)

Descriptors :   (*IMAGE INTENSIFIERS(ELECTRONICS), LOW LIGHT LEVELS), VISUAL PERCEPTION, IMAGE TUBES, PHOTOSENSITIVITY, RESOLUTION, GAIN, TRANSFER FUNCTIONS, GREAT BRITAIN

Subject Categories : Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE