Patent US4754139A successfully refreshed from Google Patents.
US4754139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uncooled high resolution infrared imaging plane
Assignee: Aerojet Rocketdyne Inc
•
Filing: 1986-04-10
•
Granted: 1988-06-28
•
Expires: 2006-04-10
Abstract
Abstract A two-dimensional infrared focal plane employing a uniquely configured detector array for reducing the thermal conductance between detectors and between each detector and its environment to enhance signal-to-noise and spacial resolution without requiring cumbersome cooling. An array of radiation concentrators placed between the detector array and the image and spaced from the array, permits widely spaced detectors without incurring any substantial dead space on the detector plane. Detector support configurations provide for connection to nodes of a readout IC substrate while positioning each detector over an air-filled or evacuated chamber to further reduce thermal conductivity.
Inventors
- 👤 Reinhard D. Ennulat
- 👤 Dieter Pommerrenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:34
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/80; H10F39/806; G; G01; G01J; G01J5/00; G01J5/02; G01J5/06; G01J5/08; G01J5/0814; G01J5/0815; G01J5/0846; H04; H04N; H04N23/00; H04N23/20; H04N23/23; H04N23/50; H04N23/54; H10F39/10; H10F39/12; H10F39/15; H10F39/157; H10F39/1575; H10F77/00; H10F77/40; H10F77/407; G01J5/10; G01J5/28; G01J2005/283
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
149 words
A thermal imager comprising: a two-dimensional planar array of thermally sensitive detectors, each such detector being spaced from other detectors in said array to reduce the thermal conductance between detectors, a detector support structure having a plurality of low thermal conductance ribbons, each such ribbon being oriented to support at least one detector and associated electrical leads in a position that is spaced from all adjacent surfaces, means for processing electrical signals generated by said detectors on said electrical leads for producing a video image from said array, and a two-dimensional array of radiation concentrators positioned between said detector array and a source of thermal energy, said concentrators being positioned in spaced relation to said detector array for directing virtually all incident thermal energy onto said detectors while preventing substantially any thermal energy from being incident between said detectors, said concentrators having an optical gain of at least 2.
Claim 2
Dependent Claim
149 words
A thermal imager comprising: a two-dimensional planar array of thermally sensitive detectors, each such detector being spaced from other detectors in said array to reduce the thermal conductance between detectors, a detector support structure having a plurality of low thermal conductance ribbons, each such ribbon being oriented to support at least one detector and associated electrical leads in a position that is spaced from all adjacent surfaces, means for processing electrical signals generated by said detectors on said electrical leads for producing a video image from said array, and a two-dimensional array of radiation concentrators positioned between said detector array and a source of thermal energy, said concentrators being positioned in spaced relation to said detector array for directing virtually all incident thermal energy onto said detectors while preventing substantially any thermal energy from being incident between said detectors, said concentrators having an optical gain of at least 2.
Claim 3
Dependent Claim
24 words
The thermal imager recited in claim 1 wherein said ribbon is folded to increase the length of the thermal conductance path between said detectors.
Claim 4
Dependent Claim
40 words
The thermal imager recited in claim 1 wherein said detector support structure further comprises a matrix of overlapping support members forming a plurality of chambers, each such chamber forming a thermally non-conductive region between a detector and said processing means.
Claim 5
Dependent Claim
14 words
The thermal imager recited in claim 1 wherein said detector comprises a bolometric sensor.
Claim 6
Dependent Claim
14 words
The thermal imager recited in claim 1 wherein said detector comprises a pyroelectric sensor.
Claim 7
Dependent Claim
23 words
The thermal imager recited in claim 1 wherein said processing means comprises an integrated circuit substrate having nodes connected to said electrical leads.
Claim 8
Dependent Claim
15 words
The thermal imager recited in claim 1 wherein said detectors are operated at ambient temperature.
Claim 9
Dependent Claim
24 words
The thermal imager recited in claim 1 wherein said concentrators are made of a material that is at least 90% reflective to infrared radiation.
Claim 10
Dependent Claim
22 words
The thermal imager recited in claim 1 wherein said concentrators transmit at least 90% of the incident thermal energy to said detectors.
Claim 11
Dependent Claim
153 words
An infrared high resolution thermal imaging plane comprising: a two-dimensional planar array of infrared sensitive detectors, each such detector being spaced from other detectors in said array to reduce the thermal conductance between detectors, a detector support structure having a plurality of low thermal conductance ribbons, each such ribbon being oriented to support at least one detector and associated electrical leads in a position that is spaced from all adjacent surfaces, means for processing electrical signals generated by said detectors on said electrical leads for producing a video image from said array, and a two-dimensional array of radiation concentrators positioned between said detector array and a source of infrared energy, said concentrators being positioned in spaced relation to said detector array for directing virtually all incident infrared energy onto said detectors while preventing substantially any infrared energy from being incident between said detectors, said concentrators having an optical gain of at least 2.
Claim 12
Dependent Claim
153 words
An infrared high resolution thermal imaging plane comprising: a two-dimensional planar array of infrared sensitive detectors, each such detector being spaced from other detectors in said array to reduce the thermal conductance between detectors, a detector support structure having a plurality of low thermal conductance ribbons, each such ribbon being oriented to support at least one detector and associated electrical leads in a position that is spaced from all adjacent surfaces, means for processing electrical signals generated by said detectors on said electrical leads for producing a video image from said array, and a two-dimensional array of radiation concentrators positioned between said detector array and a source of infrared energy, said concentrators being positioned in spaced relation to said detector array for directing virtually all incident infrared energy onto said detectors while preventing substantially any infrared energy from being incident between said detectors, said concentrators having an optical gain of at least 2.
Claim 13
Dependent Claim
24 words
The infrared imager recited in claim 10 wherein said ribbon is folded to increase the length of the thermal conductance path between said detectors.
Claim 14
Dependent Claim
40 words
The infrared imager recited in claim 10 wherein said detector support structure further comprises a matrix of overlapping support members forming a plurality of chambers, each such chamber forming a thermally non-conductive region between a detector and said processing means.
Claim 15
Dependent Claim
14 words
The infrared imager recited in claim 10 wherein said detector comprises a bolometric sensor.
Claim 16
Dependent Claim
14 words
The infrared imager recited in claim 10 wherein said detector comprises a pyroelectric sensor.
Claim 17
Dependent Claim
23 words
The infrared imager recited in claim 10 wherein said processing means comprises an integrated circuit substrate having nodes connected to said electrical leads.
Claim 18
Dependent Claim
15 words
The infrared imager recited in claim 10 wherein said detectors are operated at ambient temperature.
Claim 19
Dependent Claim
24 words
The infrared imager recited in claim 10 wherein said concentrators are made of a material that is at least 90% reflective to infrared radiation.
Claim 20
Dependent Claim
22 words
The infrared imager recited in claim 10 wherein said concentrators transmit at least 90% of the incident infrared energy to said detectors.
Claim 21
Dependent Claim
14 words
The infrared imager recited in claim 10 wherein said detector comprises a radiation thermocouple.
References Cited (Backward Citations)
US3746454A
Cited
US3723642A
Cited
US3846820A
Cited
US3845296A
Cited
US4079507A
Cited
US4162402A
Cited
US4379232A
Cited
US4425502A
Cited
US4532424A
Cited
US4558342A
Cited
US4575631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |