US3722282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for remotely displaying temperature differences of an object
Assignee: US Philips Corp
•
Filing: 1970-10-22
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Granted: 1973-03-27
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Expires: 1990-10-22
Abstract
Abstract An analyzing device for displaying temperature differences of an object in which a modulator device is inclined at an angle to the principal axis of the analyzing device and alternately transmits the rays which emanate from a point of the scene to be analyzed and a reference beam which indicates the mean temperature of the said scene.
Inventors
- 👤 F Loy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:44
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/02; H04N3/08; H04N3/09; G; G01; G01J; G01J5/00; G01J5/02; G01J5/08; G01J5/0803; G01J5/0805
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
154 words
Analyzing device for an apparatus for remotely displaying temperature optical differences of an object comprising a converging optical system and a centrally apertured oscillating plane mirror which is arranged at an angle to the principal axis of the optical system between said optical system and the focus thereof, said device further comprising a modulator which modulates the thermal radiation emanating from small elements of the object through said optical system, means responsive to a larger field than said optical system to obtain reference radiation representative of the mean temperature, and first and second detectors each responsive to radiation of different wavelengths, said modulator having a central axis which is inclined at an angle to the principal axis of the optical system, said modulator being disposed relative to the object to transmit the radiation emanating from the object to the first detector and said reference radiation to the second detector to indicate the mean temperature.
Claim 2
Dependent Claim
154 words
Analyzing device for an apparatus for remotely displaying temperature optical differences of an object comprising a converging optical system and a centrally apertured oscillating plane mirror which is arranged at an angle to the principal axis of the optical system between said optical system and the focus thereof, said device further comprising a modulator which modulates the thermal radiation emanating from small elements of the object through said optical system, means responsive to a larger field than said optical system to obtain reference radiation representative of the mean temperature, and first and second detectors each responsive to radiation of different wavelengths, said modulator having a central axis which is inclined at an angle to the principal axis of the optical system, said modulator being disposed relative to the object to transmit the radiation emanating from the object to the first detector and said reference radiation to the second detector to indicate the mean temperature.
Claim 3
Dependent Claim
52 words
A device as claimed in Claim 1 characterized in that the modulator includes means for directing the radiation emanating from the object and the reference radiation to the respective detectors comprising an assembly of two adjacent total-reflection prisms, and means to periodically vary the spacing between the opposed faces of the prisms.
References Cited (Backward Citations)
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Cited
US2963910A
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US2848626A
Cited
US3264931A
Cited
US3338656A
Cited
US3611806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |