Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1995-01-26
1996-11-05
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250349, 250DIG1, G01J 508
Patent
active
055720331
ABSTRACT:
A passive infra-red detection apparatus is described, which comprises an infrared sensor array (16) mounted in a housing (10), and a focusing reflector system (20, 22) and focusing refractor (14) which focus infra-red radiation from different distance ranges onto the sensor array (16). The sensor array (16) comprises at least three sensing elements or groups of elements (16A, 16B, 16C) spaced apart transversely with respect to the lens axis of the focusing refractor (14). Thus in combination with a multiple reflector (20, 22) having at least three reflector surfaces and/or a multiple focusing refractor (14), the sensor array receives several different views spaced apart transversely thereby providing a wider viewing angle than the prior art construction. Thus, the present detector is more suited to use with a closed-circuit television (CCTV) surveillance system.
REFERENCES:
patent: 3958118 (1976-05-01), Schwarz
patent: 4704533 (1987-11-01), Rose et al.
patent: 4752769 (1988-06-01), Knaup et al.
patent: 4841284 (1989-06-01), Biersforff
patent: 5101194 (1992-03-01), Sheffer
patent: 5107120 (1992-04-01), Tom
patent: 5134292 (1992-07-01), Segawa et al.
patent: 5227632 (1993-07-01), Armstrong et al.
patent: 5446285 (1995-08-01), Choi
Fields Carolyn E.
Security Enclosures Limited
LandOfFree
Wide-angle infra-red detection apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wide-angle infra-red detection apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide-angle infra-red detection apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2016499