US3886360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared intrusion detection apparatus
Assignee: Gulf and Western Manufacturing Co
•
Filing: 1973-09-04
•
Granted: 1975-05-27
•
Expires: 1993-09-04
Abstract
Abstract The infrared system employs a multiple mirror optical system for focusing and collecting radiation from a moving object such as an intruder and directing the energy to a sensing element. In a preferred arrangement the optical system comprises a convex mirror, a planar array of plane mirrors and a concave or parabolic collector having the sensing element disposed at the focal point thereof. The sensing element couples to a detection circuit which includes modulating means, an impedance matching circuit, amplifier circuit, filtering circuit and trigger circuit. In an alternate embodiment the optical system includes a series of plane mirrors disposed along an arcuate locus, and a concave or parabolic reflector for collecting parallel rays from the plane mirrors. In still another embodiment, a series of spaced spherical mirror segments are used having varying focal lengths.
Inventors
- 👤 Martin H Reiss
- 👤 Elias E Solomon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:49
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/18; G08B13/189; G08B13/19; G08B13/193; Y; Y10; Y10S; Y10S250/00; Y10S250/01
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
105 words
Optical apparatus for an infrared intrusion detection system comprising; a sensing element for providing an electrical signal corresponding to the level of infrared radiation impinging on the element, a convex reflective surface for receiving the radiation from objects in the field of view and reflecting at least some of the radiation in rays parallel to the principle axis of the convex reflective surface, an array of spaced reflective surfaces disposed to receive the rays from said convex surface, and a collector reflector for receiving radiation reflected from at least one of said reflective surfaces of said array and directing said radiation to said sensing element.
Claim 2
Dependent Claim
105 words
Optical apparatus for an infrared intrusion detection system comprising; a sensing element for providing an electrical signal corresponding to the level of infrared radiation impinging on the element, a convex reflective surface for receiving the radiation from objects in the field of view and reflecting at least some of the radiation in rays parallel to the principle axis of the convex reflective surface, an array of spaced reflective surfaces disposed to receive the rays from said convex surface, and a collector reflector for receiving radiation reflected from at least one of said reflective surfaces of said array and directing said radiation to said sensing element.
Claim 3
Dependent Claim
32 words
The apparatus of claim 1 wherein said convex reflective surface has a principle axis and said array of reflective surface are disposed in a plane, said axis being non-orthogonal to said plane.
Claim 4
Dependent Claim
16 words
The apparatus of claim 2 wherein said array includes means commonly mounting said spaced reflective surfaces.
Claim 5
Dependent Claim
33 words
The apparatus of claim 3 wherein said spaced reflective surfaces are disposed in a plurality of sets spaced to permit radiation from the field of view to pass to the convex reflective surface.
Claim 6
Dependent Claim
18 words
The apparatus of claim 4 wherein the reflective surfaces of each set are separated by a non-reflective member.
Claim 7
Dependent Claim
19 words
The apparatus of claim 1 wherein each said reflective surface of said array is of square or rectangular shape.
Claim 8
Dependent Claim
17 words
The apparatus of claim 1 wherein each said reflective surface of said array is of triangular shape.
Claim 9
Dependent Claim
23 words
The apparatus of claim 1 wherein said collector reflector is a concave reflector having the sensing element disposed at the focal point thereof.
Claim 10
Dependent Claim
134 words
Optical apparatus for an infrared intrusion detection system to detect the motion of objects or persons in a field of view that is to be secured comprising; a sensing element for providing an electrical signal corresponding to the level of infrared radiation impinging on the element, a series of stationary adjacent plane mirrors disposed along an arcuate locus to form a concave reflective surface having a window space between each adjacent mirror, each said mirror angled only slightly from its adjacent mirror, each said mirror for receiving radiation from objects in the field of view and reflecting at least some of the radiation in rays in parallel, a collector reflector for receiving the parallel rays reflected from at least one of said mirrors and directing primarily only the parallel rays to said sensing element.
Claim 11
Dependent Claim
134 words
Optical apparatus for an infrared intrusion detection system to detect the motion of objects or persons in a field of view that is to be secured comprising; a sensing element for providing an electrical signal corresponding to the level of infrared radiation impinging on the element, a series of stationary adjacent plane mirrors disposed along an arcuate locus to form a concave reflective surface having a window space between each adjacent mirror, each said mirror angled only slightly from its adjacent mirror, each said mirror for receiving radiation from objects in the field of view and reflecting at least some of the radiation in rays in parallel, a collector reflector for receiving the parallel rays reflected from at least one of said mirrors and directing primarily only the parallel rays to said sensing element.
Claim 12
Dependent Claim
98 words
Optical apparatus for an infrared intrusion detection system comprising; a sensing element for providing an electrical signal corresponding to the level of infrared radiation impinging on the element, and a plurality of spaced apart reflective surfaces for gathering infrared radiation from a plurality of discrete fields of view and focusing said radiation on said sensing element, said sensing element being disposed closer to one of said reflective surfaces to more sharply focus radiation received from distant objects, the other of said reflective surfaces for receiving radiation from objects located closer to said reflective surfaces than said distant objects.
Claim 13
Dependent Claim
98 words
Optical apparatus for an infrared intrusion detection system comprising; a sensing element for providing an electrical signal corresponding to the level of infrared radiation impinging on the element, and a plurality of spaced apart reflective surfaces for gathering infrared radiation from a plurality of discrete fields of view and focusing said radiation on said sensing element, said sensing element being disposed closer to one of said reflective surfaces to more sharply focus radiation received from distant objects, the other of said reflective surfaces for receiving radiation from objects located closer to said reflective surfaces than said distant objects.
Claim 14
Dependent Claim
20 words
The optical apparatus of claim 10 wherein said spaced apart reflective surfaces are concave and arranged along an arcuate locus.
Claim 15
Dependent Claim
82 words
Optical apparatus for an infrared intrusion detection system comprising; a sensing element for providing an electrical signal corresponding to the level of infrared radiation impinging on the element, and a plurality of spaced apart reflective surfaces for gathering infrared radiation from a plurality of discrete fields of view and focusing said radiation on said sensing element, at least some of said reflective surfaces having different focal lengths, adjacent reflective surfaces being of different focal length and disposed along different locii of curvature.
Claim 16
Dependent Claim
82 words
Optical apparatus for an infrared intrusion detection system comprising; a sensing element for providing an electrical signal corresponding to the level of infrared radiation impinging on the element, and a plurality of spaced apart reflective surfaces for gathering infrared radiation from a plurality of discrete fields of view and focusing said radiation on said sensing element, at least some of said reflective surfaces having different focal lengths, adjacent reflective surfaces being of different focal length and disposed along different locii of curvature.
Claim 17
Dependent Claim
26 words
The optical apparatus of claim 12 wherein the reflective surfaces include a center surface of first focal length and adjacent surfaces of progressively larger focal length.
Claim 18
Dependent Claim
108 words
Optical apparatus for an infrared intrusion detection system comprising a sensing element for providing an electrical signal corresponding to the level of infrared radiation impinging on the element, and a plurality of spaced apart concave reflective surfaces arranged along an arcuate locus and for gathering radiation from a plurality of spaced apart reflective surfaces for gathering infrared radiation from a plurality of discrete fields of view and focusing said radiation on said sensing element, said sensing element being disposed at the focal point of only one of said reflective surfaces thereby being generally closer to said one reflective surface to more sharply focus radiation received from distant objects.
Claim 19
Dependent Claim
108 words
Optical apparatus for an infrared intrusion detection system comprising a sensing element for providing an electrical signal corresponding to the level of infrared radiation impinging on the element, and a plurality of spaced apart concave reflective surfaces arranged along an arcuate locus and for gathering radiation from a plurality of spaced apart reflective surfaces for gathering infrared radiation from a plurality of discrete fields of view and focusing said radiation on said sensing element, said sensing element being disposed at the focal point of only one of said reflective surfaces thereby being generally closer to said one reflective surface to more sharply focus radiation received from distant objects.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |