US4041314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detector device responsive to infrared radiation
Assignee: Bodenseewerk Geratetechnik GmbH
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Filing: 1976-05-03
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Granted: 1977-08-09
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Expires: 1996-05-03
Abstract
Abstract A concave mirror and a rotating plane mirror image an object to be detected on a reticle and screen, which reticle modulates the image. A field lens and a light piping cone projects the modulated and filtered image on an infrared detector cell. Except for the two mirrors, all of the aforesaid system is cooled by a cryostat.
Inventors
- 👤 Hans Oppelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:41
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/02; G01J5/06; G01J5/061; G01J1/00; G01J1/02; G01J1/0252; G01J1/04; G01J1/0407; G01J1/0411; G01J1/0422; G01J5/08; G01J5/0806; G01J5/0808; G01J5/0815; G01J5/084; H; H10; H10F; H10F77/00; H10F77/40; H10F77/407; H10F77/413; G01J2005/0077
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
160 words
In a detector device responsive to infrared radiation and including a double-walled vessel having an inner wall which forms a cooling means container and an outer wall, the two walls defining a vacuum chamber; a detector element to be exposed to the infrared radiation located within said vacuum chamber in heat-conducting connection with the cooling means container, said detector element being exposed to the infrared radiation in an imaging path of rays through the end of the outer wall; an opaque screen located in the vacuum chamber, said screen enclosing the detector element and defining a radiation entrance aperture and being also in heat-conducting connection with the cooling means container; optical imaging means arranged in the radiation entrance aperture of the opaque screen; and a radiation modulating reticle located in the image plane and being partly transparent and partly opaque, the improvement comprising: the reticle being located in the vacuum chamber and in heat-conducting connection with the cooling means container.
Claim 2
Dependent Claim
160 words
In a detector device responsive to infrared radiation and including a double-walled vessel having an inner wall which forms a cooling means container and an outer wall, the two walls defining a vacuum chamber; a detector element to be exposed to the infrared radiation located within said vacuum chamber in heat-conducting connection with the cooling means container, said detector element being exposed to the infrared radiation in an imaging path of rays through the end of the outer wall; an opaque screen located in the vacuum chamber, said screen enclosing the detector element and defining a radiation entrance aperture and being also in heat-conducting connection with the cooling means container; optical imaging means arranged in the radiation entrance aperture of the opaque screen; and a radiation modulating reticle located in the image plane and being partly transparent and partly opaque, the improvement comprising: the reticle being located in the vacuum chamber and in heat-conducting connection with the cooling means container.
Claim 3
Dependent Claim
29 words
In a detector device as set forth in claim 1, wherein the reticle is located in said radiation entrance aperture of said screen and in contact with the screen.
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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |