Accession Number : ADD013732

Title :   Helmet Mounted Eye Tracker Using a Position Sensing Detector.

Descriptive Note : Patent, Filed 11 May 81, patented 27 Oct 87,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Breglia, Denis R

Report Date : 27 Oct 1987

Pagination or Media Count : 5

Abstract : A helmet mounted eye tracker is disclosed for monitoring the position of the cornea of a human eye which includes an infrared light source for projecting a pulsed infrared light beam along a first optical path, a mirror for redirecting the pulsed infrared light beam along a second optical path, and a beam splitter for redirecting the pulsed infrared light beam onto the cornea of the eye such that within the eye a virtual image is formed which changes position with movement of the cornea of the eye. The virtual image formed within the eye is then redirected along the second optical path by the beam splitter to the mirror which, in turn, redirects the virtual image to a collecting lens positioned along the first optical path. The collecting lens will then focus the virtual image upon the active area of an infrared light detector which will provide at its output square wave signals indicative of the X and Y coordinate positions of the cornea of the eye within the active area of the infrared light detector.

Descriptors :   *INFRARED DETECTORS, *TRACKING, *PATENTS, BEAM SPLITTING, CORNEA, DETECTION, DETECTORS, EYE, HELMETS, HUMANS, INFRARED PULSES, INFRARED RADIATION, LIGHT PULSES, LIGHT SOURCES, MOBILIZATION, OPTICS, OUTPUT, PATHS, POSITION(LOCATION), SIGNALS, SQUARE WAVES

Subject Categories : Target Direction, Range and Position Finding
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE