US3169189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared thermograph
Assignee: Barnes Engineering Co
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Filing: 1963-04-11
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Granted: 1965-02-09
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Expires: 1983-04-11
Abstract
No abstract record available.
Inventors
- 👤 Barnes Robert Bowling
- 👤 Banca Maggio Charles
- 👤 Nelson E Engborg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:18
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/02; G02B26/04; G02B23/00; G02B23/12; G03; G03B; G03B15/00; G03B27/00; G03B27/02; G03B27/14; G03B27/30; G03B27/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
209 words
IN AN INFRARED THERMOGRAPH INCLUDING AN INFRARED DETECTOR, MEANS FOR IMAGING THE DETECTOR ONTO THE PLANE OF THE SCENE TO BE THERMOGRAPHED, SAID IMAGING MEANS INCLUDING FOCUSING OPTICS AND MEANS FOR SCANNING THE IMAGE OF THE DETECTOR ACROSS THE SCENE TO BE THERMOGRAPHED IN THE FORM OF A RASTER, THE IMPROVEMENT WHICH COMPRISES, (A) A DICHROIC MIRROR ON THE OPTICAL AXIS AND INCLINED THERETO BETWEEN THE INFRARED DETECTOR AND THE SCANNING MEANS, SAID MIRROR REFLECTING SHORTER RADIATIONS, INCLUDING RADIATIONS IN THE VISIBLE SPECTRUM, AND PASSING LONGER WAVE INFRARED RADIATIONS, (B) A SOURCE OF VISIBLE LIGHT, MEANS FOR PRODUCING A BEAM STRIKING THE INCLINED DICHROIC MIRROR AT AN ANGLE TO BE REFLECTED ALONG THE OPTICAL AXIS IN THE DIRECTION OF THE SCANNING MEANS OF THE THERMOGRAPH, SAID SOURCE BEING LOCATED THE SAME DISTANCE FROM THE DICHROIC MIRROR AS THE INFRARED DETECTOR AND PRODUCING A BEAM OF LIGHT HAVING A DIVERGENCE EQUAL TO THE CONVERGENCE OF THE INFRARED RADIATION STRIKING THE DETECTOR WHEREBY WHEN THE LIGHT BEAM IS FOCUSED TO A SHARP IMAGE IN THE PLANE OF THE SCENE TO BE THERMOGRAPHED THE INFRARED DETECTOR IS ALSO SHARPLY IMAGED, AND (C) MEANS FOR PERIODICALLY INTERRUPTING THE INFRARED BEAM TO THE DETECTOR AND PRODUCING RADIATION STRIKING THE DETECTOR FROM A REFERENCE SOURCE.
Claim 2
Dependent Claim
209 words
IN AN INFRARED THERMOGRAPH INCLUDING AN INFRARED DETECTOR, MEANS FOR IMAGING THE DETECTOR ONTO THE PLANE OF THE SCENE TO BE THERMOGRAPHED, SAID IMAGING MEANS INCLUDING FOCUSING OPTICS AND MEANS FOR SCANNING THE IMAGE OF THE DETECTOR ACROSS THE SCENE TO BE THERMOGRAPHED IN THE FORM OF A RASTER, THE IMPROVEMENT WHICH COMPRISES, (A) A DICHROIC MIRROR ON THE OPTICAL AXIS AND INCLINED THERETO BETWEEN THE INFRARED DETECTOR AND THE SCANNING MEANS, SAID MIRROR REFLECTING SHORTER RADIATIONS, INCLUDING RADIATIONS IN THE VISIBLE SPECTRUM, AND PASSING LONGER WAVE INFRARED RADIATIONS, (B) A SOURCE OF VISIBLE LIGHT, MEANS FOR PRODUCING A BEAM STRIKING THE INCLINED DICHROIC MIRROR AT AN ANGLE TO BE REFLECTED ALONG THE OPTICAL AXIS IN THE DIRECTION OF THE SCANNING MEANS OF THE THERMOGRAPH, SAID SOURCE BEING LOCATED THE SAME DISTANCE FROM THE DICHROIC MIRROR AS THE INFRARED DETECTOR AND PRODUCING A BEAM OF LIGHT HAVING A DIVERGENCE EQUAL TO THE CONVERGENCE OF THE INFRARED RADIATION STRIKING THE DETECTOR WHEREBY WHEN THE LIGHT BEAM IS FOCUSED TO A SHARP IMAGE IN THE PLANE OF THE SCENE TO BE THERMOGRAPHED THE INFRARED DETECTOR IS ALSO SHARPLY IMAGED, AND (C) MEANS FOR PERIODICALLY INTERRUPTING THE INFRARED BEAM TO THE DETECTOR AND PRODUCING RADIATION STRIKING THE DETECTOR FROM A REFERENCE SOURCE.
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) | 1968-02-09 | 1968-08-10 | 1969-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-09 | 1972-08-10 | 1973-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-09 | 1976-08-10 | 1977-02-09 | $7700.00 | Window Closed / Lapsed |