Accession Number : AD0639370

Title :   A PROJECTION TIMER FOR VISUAL RESEARCH.

Descriptive Note : Memorandum rept.

Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD PSYCHOLOGICAL LAB

Personal Author(s) : Woollen ,C. E. ; Hamburger,F. , Jr

Report Date : 10 NOV 1946

Pagination or Media Count : 12

Abstract : A device is described for providing visual images for research dealing with visual display methods. The apparatus will produce images variable in diameter from three inches to five feet, with exposure times adjustable from 0.15 to 0.8 seconds with build-up and decay time not exceeding four milliseconds. (Author)

Descriptors :   (*TIMING DEVICES, OPTICAL IMAGES), PHOTOGRAPHIC PROJECTORS, VISION, SCREENS(DISPLAYS), DISPLAY SYSTEMS

Subject Categories : Anatomy and Physiology
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE