US5095215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal ir detector electrode configuration
Assignee: BAE Systems Electronics Ltd
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Filing: 1989-11-27
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Granted: 1992-03-10
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Expires: 2009-11-27
Abstract
Abstract A dielectric bolometer thermal detector of infra-red radiation comprises a layer of dielectric bolometer material, a thermally insulating layer therebelow, a pair of electrodes located on one and the same side of said layer of dielectric bolometer material, a source of bias voltage for providing a bias voltage to said electrode so as to provide a bias field in said layer of bolometer material and a pair of read out contacts respectively connected to said electrodes. A signal which appears between said contacts in response to the application of radiation to said layer of dielectric bolometer material constitutes an output of the detector.
Inventors
- 👤 Nicholas M. Shorrocks
- 👤 Robert C. Twiney
- 👤 Roger W. Whatmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:00
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A dielectric bolometer thermal detector of infra-red radiation comprising a layer of dielectric bolometer material of thickness not greater than twice the thermal diffusion length of the lowest operating frequency of the detector, a thermally insulating layer therebelow, a pair of electrodes located on one and the same side of said layer of dielectric bolometer material, a source of bias voltage for providing a bias voltage to said electrodes so as to provide a bias field in said layer of bolometer material and a pair of read out contacts respectively connected to said electrodes, wherein a signal appears between said contacts in response to the application of radiation to said layer of dielectric bolometer material constituting an output of the detector.
Claim 2
Dependent Claim
121 words
A dielectric bolometer thermal detector of infra-red radiation comprising a layer of dielectric bolometer material of thickness not greater than twice the thermal diffusion length of the lowest operating frequency of the detector, a thermally insulating layer therebelow, a pair of electrodes located on one and the same side of said layer of dielectric bolometer material, a source of bias voltage for providing a bias voltage to said electrodes so as to provide a bias field in said layer of bolometer material and a pair of read out contacts respectively connected to said electrodes, wherein a signal appears between said contacts in response to the application of radiation to said layer of dielectric bolometer material constituting an output of the detector.
Claim 3
Dependent Claim
31 words
A detector as claimed in claim 1 wherein the electrodes comprise two areas of metallization, separated by a distance approximately equal to the thickness of said layer of dielectric bolometer material.
Claim 4
Dependent Claim
18 words
A detector as claimed 2 in which the electrodes comprise interdigitated comb-like structure with 3 or more fingers.
Claim 5
Dependent Claim
29 words
A detector as claimed in claim 1, incorporating a floating, that is electrically unconnected, electrode on the other side of said layer of dielectric bolometer material opposite the electrodes.
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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) | 1995-03-10 | 1995-09-09 | 1996-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-10 | 1999-09-09 | 2000-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-10 | 2003-09-09 | 2004-03-10 | $7700.00 | Window Closed / Lapsed |