US5200624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide-angle radiant energy detector
Assignee: Pittway Corp
•
Filing: 1991-09-09
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Granted: 1993-04-06
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Expires: 2011-09-09
Abstract
Abstract A wide angle passive infrared energy sensor includes an infrared transducer. Energy in the field of view which is essentially normal to the transducer impinges directly on the transducer which can in turn generate an electrical signal in response thereto. Radiant energy at the peripheral regions of the field of view, on the order of 90° with respect to a center line normal to the detector, is parabolically reflected onto the detector.
Inventors
- 👤 John T. Pederson, Jr.
- 👤 Curtis R. Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:36
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: 31
Claim 1
Independent Claim
144 words
A wide-angle device for detecting radiant energy emitted theretoward within a predetermined field of view having a central portion and a laterally displaced peripheral portion, the device comprising: a supporting frame having a first supporting region and a second supporting region displaced laterally from said first region; a radiant energy detector carried on said first region for directly receiving radiant energy from the central portion of the field of view with said second region, at least in part, located laterally of said detector; and at least one reflector supported on said second region and shaped to conform to a portion of a parabola with said detector substantially located at a focal point of said parabola, said reflector being offset from said central portion and located between the peripheral portion and said detector to direct incident radiant energy from the peripheral region onto said detector.
Claim 2
Dependent Claim
144 words
A wide-angle device for detecting radiant energy emitted theretoward within a predetermined field of view having a central portion and a laterally displaced peripheral portion, the device comprising: a supporting frame having a first supporting region and a second supporting region displaced laterally from said first region; a radiant energy detector carried on said first region for directly receiving radiant energy from the central portion of the field of view with said second region, at least in part, located laterally of said detector; and at least one reflector supported on said second region and shaped to conform to a portion of a parabola with said detector substantially located at a focal point of said parabola, said reflector being offset from said central portion and located between the peripheral portion and said detector to direct incident radiant energy from the peripheral region onto said detector.
Claim 3
Dependent Claim
70 words
A device as in claim 1 usable where the field of view has a second peripheral portion laterally displaced from the peripheral portion with the central portion therebetween, the device including a second reflector, having a shape corresponding to that of said first reflector and carried on said second region, displaced laterally from said one reflector with said detector therebetween and located between the second peripheral portion and said detector.
Claim 4
Dependent Claim
75 words
A device as in claim 2 including third and fourth parabolic reflectors, each carried on said second region, with said third reflector displaced from said one and second reflectors but adjacent to said one reflector and with said detector between said second and said third reflectors with said fourth reflector displaced from said one and said second reflectors but adjacent to said second reflector and with said detector between said one and said fourth reflectors.
Claim 5
Dependent Claim
13 words
A device as in claim 1 with said frame having a rectangular cross-section.
Claim 6
Dependent Claim
18 words
A device as in claim 1 with said reflector formed of a plastic body with a reflective coating.
Claim 7
Dependent Claim
13 words
A device as in claim 1 including a cover transmissive of radiant energy.
Claim 8
Dependent Claim
14 words
A device as in claim 6 with said cover including an integrally formed lens.
Claim 9
Dependent Claim
18 words
A device as in claim 1 including means for generating an electrical signal in response to incident radiation.
Claim 10
Dependent Claim
13 words
A device as in claim 8 with said generating means including a comparator.
Claim 11
Independent Claim
129 words
A device for detecting incident radiant energy emitted from a source within a field of vision approaching ninety degrees with respect to a defined vision field center line comprising: a support structure; a radiant energy detector carried on said structure orientable with the center line normal thereto with radiant energy in the field of vision that is substantially parallel to the center line directly incident on said detector; and a parabolic reflector carried by said support structure, offset laterally with respect to the detector for deflecting incident peripheral radiant energy within the field, oriented at an angle that can approach ninety degrees with respect to the center line, onto the detector wherein said reflector is located between said detector and at least some of the incident peripheral radiant energy.
Claim 12
Independent Claim
129 words
A device for detecting incident radiant energy emitted from a source within a field of vision approaching ninety degrees with respect to a defined vision field center line comprising: a support structure; a radiant energy detector carried on said structure orientable with the center line normal thereto with radiant energy in the field of vision that is substantially parallel to the center line directly incident on said detector; and a parabolic reflector carried by said support structure, offset laterally with respect to the detector for deflecting incident peripheral radiant energy within the field, oriented at an angle that can approach ninety degrees with respect to the center line, onto the detector wherein said reflector is located between said detector and at least some of the incident peripheral radiant energy.
Claim 13
Dependent Claim
17 words
A device as in claim 10 with said detector located at a focal point of said reflector.
Claim 14
Dependent Claim
22 words
A device as in claim 10 with a lens between said detector and the source, said lens carried on said support structure.
Claim 15
Dependent Claim
27 words
A device as in claim 12 with said lens including means for focusing radiant energy incident thereon, from a central portion of the field, onto said detector.
Claim 16
Dependent Claim
19 words
A device as in claim 12 with said lens not effective to focus radiant energy incident on said reflector.
Claim 17
Dependent Claim
30 words
A device as in claim 10 including a second reflector, carried on said support structure, displaced laterally with respect to said detector and with said detector disposed between said reflectors.
Claim 18
Dependent Claim
45 words
A device as in claim 15 including third and fourth parabolic reflectors carried on said support structure with said detector generally centrally located between said reflectors such that radiant energy normal to said detector is not blocked from said detector by any of said reflectors.
Claim 19
Dependent Claim
15 words
A device as in claim 16 with said detector sensitive to incident infrared radiant energy.
Claim 20
Dependent Claim
12 words
A device as in claim 10 with said detector an infrared detector.
Claim 21
Dependent Claim
24 words
A device as in claim 10 including electronic circuitry for producing an output electrical signal in response to radiant energy incident on said detector.
Claim 22
Dependent Claim
82 words
A radiant energy detector comprising a plurality of reflectors with each member of said plurality having a curved, parabolic reflecting surface and an energy detector fixedly located between said members of said plurality for directly receiving a portion of incident radiant energy with said members displaced from said detector so as not to block directly receivable incident radiant energy and for receiving reflected radiant energy, from at least one of reflectors with that radiant energy reflected thereby without first crossing said detector.
Claim 23
Dependent Claim
82 words
A radiant energy detector comprising a plurality of reflectors with each member of said plurality having a curved, parabolic reflecting surface and an energy detector fixedly located between said members of said plurality for directly receiving a portion of incident radiant energy with said members displaced from said detector so as not to block directly receivable incident radiant energy and for receiving reflected radiant energy, from at least one of reflectors with that radiant energy reflected thereby without first crossing said detector.
Claim 24
Dependent Claim
28 words
A detector as in claim 20 including a supporting frame with said reflectors carried spaced apart thereon and with said detector carried on said frame centrally located therebetween.
Claim 25
Dependent Claim
16 words
A detector as in claim 21 with said plurality including at least four of said reflectors.
Claim 26
Independent Claim
57 words
A method of sensing incident radiant energy from a viewing field substantially equal to 90 degrees from a predetermined line comprising: directly detecting a portion of the radiant energy oriented parallel to the line and incident on a predetermined region; and deflecting a second portion of incident radiant energy only parabolically onto the region thereby detecting same.
Claim 27
Independent Claim
57 words
A method of sensing incident radiant energy from a viewing field substantially equal to 90 degrees from a predetermined line comprising: directly detecting a portion of the radiant energy oriented parallel to the line and incident on a predetermined region; and deflecting a second portion of incident radiant energy only parabolically onto the region thereby detecting same.
Claim 28
Dependent Claim
37 words
A method as in claim 23 including deflecting a third portion of the incident radiant energy oriented at a selected angle, in a range of zero to sixty degrees with respect to the line, onto the region.
Claim 29
Dependent Claim
34 words
A method as in claim 23 with the deflected second portion of energy oriented at a selected angle, in a range of sixty to ninety degrees with respect to the line, onto the region.
Claim 30
Dependent Claim
20 words
A method as in claim 23 including generating an electrical signal responsive to the radiant energy incident on the region.
Claim 31
Dependent Claim
27 words
A method as in claim 23 including deflecting radiant energy oriented at angles on the order of ±90 degrees, with respect to the line, onto the region.
References Cited (Backward Citations)
US3219642A
Cited
US3239675A
Cited
US3551676A
Cited
US4081680A
Cited
US4268752A
Cited
US4238675A
Cited
US4322124A
Cited
US4375034A
Cited
US4514630A
Cited
US4514631A
Cited
US4644147A
Cited
US4606600A
Cited
JPS60158364A
Cited
US4625115A
Cited
US4717821A
Cited
US4752769A
Cited
US4703171A
Cited
US4778996A
Cited
US4823051A
Cited
US4876445A
Cited
US4930864A
Cited
US5083025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-05 | 1996-10-05 | 1997-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-05 | 2000-10-05 | 2001-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-05 | 2004-10-05 | 2005-04-06 | $7700.00 | Window Closed / Lapsed |