Patent US4752958A successfully refreshed from Google Patents.
Patent US4238675A successfully refreshed from Google Patents.
US4238675A
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US
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Optics for infrared intrusion detector
Assignee: Disys Corp
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Filing: 1979-06-14
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Granted: 1980-12-09
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Expires: 1999-06-14
Abstract
Abstract An infrared intrusion detector has an optical system for gathering infrared radiation from discrete sensitive regions and focusing such received radiation onto an infrared radiation sensor. The detector includes a monitoring device to sound an alarm when radiation sensed reaches a predetermined level. The optical system comprises an optical collector for gathering radiation from a field which includes the sensitive regions and for converging such radiation onto a plurality of reflectors. Each reflector determines one of the discrete sensitive regions and, in turn, is oriented to reflect converging radiation gathered from a sensitive region on the detector. The invention provides a simple, efficient optic system for a broad field of gathering infrared radiation, concentrating and focusing it in a manner to provide sufficient levels of received radiation for purposes of detection.
Inventors
- 👤 Zbigniew W. Turlej
- 👤 Donald F. Hawken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:38
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/14; G08; G08B; G08B13/00; G08B13/18; G08B13/189; G08B13/19; G08B13/193; Y; Y10; Y10S; Y10S250/00; Y10S250/01
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
91 words
In an infrared intrusion detector, an optical device to direct gathered infrared radiation from several discrete, spaced-apart sensitive regions onto an infrared radiation sensor, said device comprising an optical collector for gathering infrared radiation from a space including such sensitive regions and for converging such radiation from a space onto a plurality of reflectors corresponding in number to the number of sensitive regions where each reflector determines a discrete sensitive region and, in turn, is oriented to reflect converging radiation from a corresponding discrete sensitive region onto said infrared radiation sensor
Claim 2
Dependent Claim
91 words
In an infrared intrusion detector, an optical device to direct gathered infrared radiation from several discrete, spaced-apart sensitive regions onto an infrared radiation sensor, said device comprising an optical collector for gathering infrared radiation from a space including such sensitive regions and for converging such radiation from a space onto a plurality of reflectors corresponding in number to the number of sensitive regions where each reflector determines a discrete sensitive region and, in turn, is oriented to reflect converging radiation from a corresponding discrete sensitive region onto said infrared radiation sensor
Claim 3
Dependent Claim
15 words
In an infrared intrusion detector of claim 1, said optical collector being a concave mirror.
Claim 4
Dependent Claim
15 words
In an infrared intrusion detector of claim 1, said optical collector being a convex lens.
Claim 5
Dependent Claim
28 words
In an infrared intrusion detector of claim 1, each reflector being a planar mirror oriented differently from adjacent planar mirrors to thereby determine said discrete, spaced-apart sensitive regions.
Claim 6
Dependent Claim
32 words
In an infrared intrusion detector of claim 4, said optical collector in combination with said plurality of reflectors corverging radiation to a point located between them, where a radiation sensor is positionable.
Claim 7
Dependent Claim
38 words
In an infrared intrusion detector of claim 1, said optical collector having a focal point for reflected converging radiation between said optical collector and said plurality of reflectors, an infrared radiation sensor being positionable proximate said focal point.
Claim 8
Dependent Claim
30 words
In an infrared intrusion detector of claim 6 or 5, said reflectors being oriented to permit locating said sensor in a position which is non-interfering with converging beams of radiation.
Claim 9
Dependent Claim
61 words
In an infrared intrusion detector of claim 1, a spaced-apart pair of said optical collectors, each to a side of an infrared radiation detector, sets of plurality of reflectors, each set associated with an optical collector to reflect converging radiation from corresponding discrete sensitive regions corresponding in number to the number of reflectors in each set onto said infrared radiation detector.
Claim 10
Dependent Claim
15 words
In an infrared intrusion detector of claim 8, each optical collector being a concave mirror.
Claim 11
Dependent Claim
15 words
In an infrared intrusion detector of claim 9, said concave mirror being a spherical mirror.
Claim 12
Dependent Claim
38 words
In an infrared intrusion detector of claim 1, said optical collector being a ring having an annular reflective concave surface, said plurality of reflectors being positioned in quadrants to define discrete sensitive regions in each of four areas.
Claim 13
Dependent Claim
19 words
In an infrared intrusion detector of claim 11, a planar mirror positioned in each quadrant for the reflector arrangement.
Claim 14
Dependent Claim
24 words
In an infrared intrusion detector of claim 11, said reflectors being arranged to define sensitive regions in upper and lower areas and side-by-side areas.
Claim 15
Dependent Claim
126 words
System of mirrors for use with an infrared intrusion detector having an infrared radiation sensor, said mirror system receiving an infrared radiation from several discrete, spaced-apart detection regions and focusing such received radiation into an infrared sensor, said mirror system comprising a concavely curved mirror for receiving infrared radiation from an area which includes such regions of detection, and converging such received radiation from such area onto an array of planar mirrors, each planar mirror providing a predetermined discrete detection region as radiation is converged towards the array of mirrors, said planar mirror being positioned to reflect radiation received from a corresponding detection region onto an infrared radiation sensor, said concavely curved mirror having a focal point proximate the receiving portion of an infrared radiation sensor.
Claim 16
Dependent Claim
126 words
System of mirrors for use with an infrared intrusion detector having an infrared radiation sensor, said mirror system receiving an infrared radiation from several discrete, spaced-apart detection regions and focusing such received radiation into an infrared sensor, said mirror system comprising a concavely curved mirror for receiving infrared radiation from an area which includes such regions of detection, and converging such received radiation from such area onto an array of planar mirrors, each planar mirror providing a predetermined discrete detection region as radiation is converged towards the array of mirrors, said planar mirror being positioned to reflect radiation received from a corresponding detection region onto an infrared radiation sensor, said concavely curved mirror having a focal point proximate the receiving portion of an infrared radiation sensor.
Claim 17
Dependent Claim
37 words
A system of claim 14, wherein said concavely curved mirror is a spherical mirror having a radius of curvature equal to double the distance the radiation travels in reflection from spherical mirror to planar mirror to sensor.
Claim 18
Dependent Claim
24 words
A system of claim 14, wherein each planar mirror is oriented differently from adjacent planar mirrors to thereby define such discrete, spaced-apart detection regions.
Claim 19
Dependent Claim
58 words
A system of claim 14, wherein there is a pair of spaced-apart concavely curved mirrors, each being offset relative to an infrared radiation detector, sets of a plurality of planar mirrors in the array, each set associated with a corresponding curved mirror to reflect focused radiation received from a corresponding discrete detection region onto an infrared radiation detector.
Claim 20
Dependent Claim
13 words
A system of claim 17, wherein each concave mirror is a spherical mirror.
Claim 21
Dependent Claim
38 words
A system of claim 14, wherein said concavely curved mirror is a ring having an annular reflective concave surface, said array of planar mirrors being positioned in quadrants to define discrete detection regions in each of four areas.
Claim 22
Dependent Claim
17 words
A system of claim 19, wherein a planar mirror is positioned in each quadrant of the array.
Claim 23
Dependent Claim
35 words
A system of claim 19, wherein said array of planar mirrors is arranged to define sensitive regions in upper and lower areas and side-by-side areas of the space in which instrusion is to be detected.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |