Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1995-02-02
1997-06-03
Mullen, Thomas
Communications: electrical
Condition responsive indicating system
Specific condition
250221, 340556, 340557, 348152, 351210, 364516, G08B 1318
Patent
active
056359055
ABSTRACT:
A system is disclosed for detecting the presence of a human who may be observing an artifact which is within his or her line of sight or field of view. The system includes a laser with a lens at the output thereof and which is triggered rapidly in order to produce a pulsed beam having divergent rays of visible or invisible infrared light which irradiates an area to be examined for the presence of an observer. The light reflected from individuals and objects in the area is reflected into a pair of vision devices or pair of vision device assemblies the outputs of which are fed into a computer. The computer has software programs which utilize vision device output data relating to the intensity and location of the light pixels in the image thereof to detect the presence and orientation of the eyes of an individual in the area based on the light pixel intensity and location data.
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patent: 3986030 (1976-10-01), Teltscher
patent: 4397531 (1983-08-01), Lees
patent: 4684929 (1987-08-01), Edwards et al.
patent: 5194847 (1993-03-01), Taylor et al.
patent: 5305390 (1994-04-01), Frey et al.
Blackburn Ronald E.
Warmkessel Barry M.
Mullen Thomas
papageorge Chris
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