US5079200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detector material for uncooled thermal imaging devices
Assignee: United States Department of the Army
•
Filing: 1990-08-23
•
Granted: 1992-01-07
•
Expires: 2010-08-23
Abstract
Abstract A solid solution, ferroelectric material with a selectable Curie point cosed of lead titanate and a larger amount of strontium titanate is provided for use as a thermal detector material in ferroelectric uncooled infrared imaging systems.
Inventors
- 👤 David A. Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:04
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/47; C04B35/472; H; H01; H01G; H01G7/00; H01G7/04; H01G7/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
48 words
A thermal detector comprising a wafer of ferroelectric material sandwiched between two electrodes, at least one of which is designed to substantially totally absorb said radiation; wherein said material consists of: Pb.sub.(1-x) Sr x TiO 3 where x has a value greater than zero and less than one.
Claim 2
Dependent Claim
48 words
A thermal detector comprising a wafer of ferroelectric material sandwiched between two electrodes, at least one of which is designed to substantially totally absorb said radiation; wherein said material consists of: Pb.sub.(1-x) Sr x TiO 3 where x has a value greater than zero and less than one.
Claim 3
Dependent Claim
15 words
A detector according to claim 1, wherein: x has a value between 0.01 and 0.99.
Claim 4
Dependent Claim
15 words
A detector according to claim 1, wherein: x has a value between 0.64 and 0.68.
Claim 5
Dependent Claim
16 words
A detector according to claim 1, wherein: said detector is a sensor for a thermal imager.
Claim 6
Dependent Claim
16 words
A detector according to claim 3, wherein: said detector is a sensor for a thermal imager.
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) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |