Patent US3168998A successfully refreshed from Google Patents.
Patent US4306150A successfully refreshed from Google Patents.
US4306150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal image forming device comprising pneumatic infrared detectors
Assignee: US Philips Corp
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Filing: 1979-10-05
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Granted: 1981-12-15
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Expires: 1999-10-05
Abstract
Abstract A device for optically displaying thermal image scenes, comprising pneumatic infrared sensors, for example, temperature-sensitive gas cells. A mosaic of thermal IR sensors, which is arranged on an infrared-transparent plate and which picks up the thermal image scene, is arranged in front of a reference plate whose inclination can be adjusted and which is irradiated by optical light. The interference patterns produced are picked up by an optical system. Thermal drift is suppressed by providing the IR sensors in a hermetically sealed chamber.
Inventors
- 👤 Wolfgang Dietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:17
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/38; G01J5/42; G02; G02B; G02B23/00; G02B23/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
75 words
A device for optically displaying thermal image scenes comprising: an infrared-transparent plate; a reference plate which, in operation, is irradiated with visible light; and a mosaic of infrared sensors arranged on said infrared-transparent plate between said infrared-transparent plate and the reference plate; characterized in that the device further comprises a hermetically sealed chamber containing a gas, the infrared sensors comprise pneumatic infrared sensors, and the mosaic of sensors is accommodated in the hermetically sealed chamber.
Claim 2
Independent Claim
75 words
A device for optically displaying thermal image scenes comprising: an infrared-transparent plate; a reference plate which, in operation, is irradiated with visible light; and a mosaic of infrared sensors arranged on said infrared-transparent plate between said infrared-transparent plate and the reference plate; characterized in that the device further comprises a hermetically sealed chamber containing a gas, the infrared sensors comprise pneumatic infrared sensors, and the mosaic of sensors is accommodated in the hermetically sealed chamber.
Claim 3
Dependent Claim
42 words
A device for optically displaying thermal image scenes as claimed in claim 1, characterized in that the device further comprises an etalon, the infrared-transparent plate and the reference plate being separated by and hermetically sealed to the etalon to form the chamber.
Claim 4
Independent Claim
57 words
A device for optically displaying thermal image scenes comprising: an infrared-transparent plate; a reference plate which, in operation, is irradiated with visible light; and a mosaic of infrared sensors arranged on said infrared-transparent plate between said infrared-transparent plate and the refernce plate; characterized in that the mosaic of infrared sensors comprises a mosaic of pneumatic infrared sensors.
Claim 5
Independent Claim
57 words
A device for optically displaying thermal image scenes comprising: an infrared-transparent plate; a reference plate which, in operation, is irradiated with visible light; and a mosaic of infrared sensors arranged on said infrared-transparent plate between said infrared-transparent plate and the refernce plate; characterized in that the mosaic of infrared sensors comprises a mosaic of pneumatic infrared sensors.
Claim 6
Dependent Claim
24 words
A device for optically displaying thermal image scenes, as claimed in claim 3, characterized in that the pneumatic infrared sensors comprise gas-filled glass capillaries.
Claim 7
Dependent Claim
25 words
A device for optically displaying thermal image scenes, as claimed in claim 4, characterized in that the diameter of each sensor is approximately 0.1 mm.
Claim 8
Dependent Claim
20 words
A device for optically displaying thermal image scenes, as claimed in claim 5, characterized in that the gas comprises ethylene.
Claim 9
Dependent Claim
26 words
A device for optically displaying thermal image scenes, as claimed in claim 6, characterized in that the sensors comprise a layer of a heat absorbing material.
Claim 10
Dependent Claim
22 words
A device for optically displaying thermal image scenes, as claimed in claim 7, characterized in that the heat absorbing material is soot.
Claim 11
Dependent Claim
39 words
A device for optically displaying thermal image scenes, as claimed in claim 4, characterized in that the device further comprises a hermetically sealed chamber containing a gas, and the mosaic of sensors is accommodated in the hermetically sealed chamber.
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) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |