Accession Number : ADD012273

Title :   Variable Contrast Direct Read-Out Vision Tester.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Task,Harry L ; Genco,Louis V

Report Date : 25 Feb 1986

Pagination or Media Count : 6

Abstract : A novel vision tester and vision testing method is described which comprises a pair of translucent displays, each transilluminated by electroluminescent lighting panels, the images of two patterns being superimposed to provide a combined image characterized by a pattern of variable contrast. Light sensors near each light panel provide a measure of the relative intensities of the two images, which provides a measure of the contrast of each combined image. Contrast may be directly read out by processing the signals from the light sensors. The tester may be battery powered by portability. (Author)

Descriptors :   *PATENTS, *VISUAL PERCEPTION, *PERFORMANCE TESTS, *TEST EQUIPMENT, *CONTRAST, GRAPHICS, PATTERNS, ILLUMINATION, ELECTROLUMINESCENCE, DISPLAY SYSTEMS, OPTICAL DETECTORS, MICROPROCESSORS, PORTABLE EQUIPMENT

Subject Categories : Anatomy and Physiology
      Medical Facilities, Equipment and Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE