US3562529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared thermograph producing color images by selective insertion of color filters between a scanning light source and a light sensitive surface
Assignee: Barnes Engineering Co
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Filing: 1968-07-03
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Granted: 1971-02-09
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Expires: 1988-07-03
Abstract
Abstract An infrared thermograph is provided which synchronously scans an infrared detector over a field of view and a constant brightness light over a light sensitive surface. The constant brightness light source is modulated by a filter means in accordance with signals developed by the infrared detector to produce a thermal image of the field of view of the thermograph on the light sensitive surface. A number of different visual displays, including color, are provided depending on the type of filters used.
Inventors
- 👤 Nelson E Engborg
- 👤 Robert Bowling Barnes
- 👤 Maggio Charles Banca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:16
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/48; A; A61; A61B; A61B5/00; A61B5/01; G01J5/02; G01J5/025; G01J5/026; G01J5/04; G01J5/047; G01J5/07; G01J5/08; G01J5/0801; G01J5/0802; G01J5/0803; G01J5/0805; G01J5/0806; G01J5/0813
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
223 words
An infrared thermograph for producing visual presentations in accordance with infrared radiation received from the field of view of the thermograph comprising in combination: a. an infrared detector responsive ''''to the intensity of incident radiation'''' b. optical means including a scanning means for scanning, collecting and focusing infrared radiation from a predetermined field of view onto said infrared detector which produces signals in accordance with the infrared radiation received from said field of view; c. a continuously illuminated constant brightness light source; d. a small aperture positioned above said light source for producing a constant, defined beam of light therefrom; e. a light sensitive surface; f. means for moving said beam of light from said light source in synchronism with said scanning means whereby said beam of light is scanned across said light sensitive surface synchronously with the scanning of the field of view of the thermograph; g. filter means having a plurality of different filter components in a predetermined arrangement positioned to Intercept said beam of light, before said beam strikes said surface; and h. transducer means for adjusting said filter means in accordance with signals from said infrared detector whereby said beam of light is modulated by said filter means as it moves across said light sensitive surface to produce a thermal image of the field of view of said thermograph.
Claim 2
Dependent Claim
223 words
An infrared thermograph for producing visual presentations in accordance with infrared radiation received from the field of view of the thermograph comprising in combination: a. an infrared detector responsive ''''to the intensity of incident radiation'''' b. optical means including a scanning means for scanning, collecting and focusing infrared radiation from a predetermined field of view onto said infrared detector which produces signals in accordance with the infrared radiation received from said field of view; c. a continuously illuminated constant brightness light source; d. a small aperture positioned above said light source for producing a constant, defined beam of light therefrom; e. a light sensitive surface; f. means for moving said beam of light from said light source in synchronism with said scanning means whereby said beam of light is scanned across said light sensitive surface synchronously with the scanning of the field of view of the thermograph; g. filter means having a plurality of different filter components in a predetermined arrangement positioned to Intercept said beam of light, before said beam strikes said surface; and h. transducer means for adjusting said filter means in accordance with signals from said infrared detector whereby said beam of light is modulated by said filter means as it moves across said light sensitive surface to produce a thermal image of the field of view of said thermograph.
Claim 3
Dependent Claim
23 words
The infrared thermograph set forth in claim 1 wherein the plurality of filter components of said filter means comprise a continuous spectrum filter.
Claim 4
Dependent Claim
44 words
The infrared thermograph set forth in claim 1 wherein said filter means includes an opaque section on one extremity thereof, said opaque section being positioned over said aperture when said transducer is actuated by said scanning means during retrace intervals of a scan cycle.
Claim 5
Dependent Claim
44 words
The infrared thermograph set forth in claim 1 wherein said filter means includes a transparent section positioned next to a filter component which represents the coldest color of the plurality of different filter components for providing a hot background on said light sensitive surface.
Claim 6
Dependent Claim
21 words
The infrared thermograph set forth in claim 1 wherein the plurality of filter components of said filter means comprise discrete bands.
Claim 7
Dependent Claim
21 words
The infrared thermograph set forth in claim 5 wherein at least two of said discrete bands are separated by transparent sections.
Claim 8
Dependent Claim
21 words
The infrared thermograph set forth in claim 5 wherein at least two of said discrete bands are separated by opaque sections.
Claim 9
Dependent Claim
163 words
An infrared thermograph for producing visual presentations in accordance with infrared radiation received from the field of view of the thermograph comprising in combination: a. an infrared detector; b. means including said infrared detector for scanning a predetermined field of view to produce signals in accordance with the intensity of infrared radiation received from said field of view; c. a continuously illuminated constant brightness light source; d. filter means having a plurality of different filter elements in a predetermined arrangement including an opaque section on one extremity thereof positioned to intercept said light source; e. means for scanning said light source over a light sensitive surface in synchronism with the scanning of the field of view of the thermograph; f. means including said filter means for modulating said constant brightness light source in accordance with signals from said infrared detector in which said opaque section is positioned to block said light source during retrace intervals in the scanning of said field of view.
Claim 10
Dependent Claim
163 words
An infrared thermograph for producing visual presentations in accordance with infrared radiation received from the field of view of the thermograph comprising in combination: a. an infrared detector; b. means including said infrared detector for scanning a predetermined field of view to produce signals in accordance with the intensity of infrared radiation received from said field of view; c. a continuously illuminated constant brightness light source; d. filter means having a plurality of different filter elements in a predetermined arrangement including an opaque section on one extremity thereof positioned to intercept said light source; e. means for scanning said light source over a light sensitive surface in synchronism with the scanning of the field of view of the thermograph; f. means including said filter means for modulating said constant brightness light source in accordance with signals from said infrared detector in which said opaque section is positioned to block said light source during retrace intervals in the scanning of said field of view.
Claim 11
Dependent Claim
44 words
The infrared thermograph set forth in claim 8 wherein said filter means includes a transparent section positioned next to a filter component which represents the coldest presentation of the plurality of different filter components for providing a hot background on said light sensitive surface.
Claim 12
Dependent Claim
28 words
The infrared thermograph set forth in claim 8 wherein said filter means includes a plurality of discrete bands at least two of which are separated by transparent sections.
References Cited (Backward Citations)
US2895049A
Cited
US3303508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |