IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0700586
(1996-08-08)
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발명자
/ 주소 |
- Wood Roland Andrew (Bloomington MN) Kubisiak David (Chanhassen MN) Rezachek Thomas Michael (Cottage Grove MN)
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| 출원인 / 주소 |
- Honeywell Inc. (Minneapolis MN 02)
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| 인용정보 |
피인용 횟수 :
39 인용 특허 :
9 |
초록
▼
A low-cost portable handheld still-frame thermal camera for capture of calibrated digital thermographic infrared images having a lens assembly, a slideable linear array of uncooled 8-12 um thermal IR sensors, a slider actuation mechanism, and associated digital processing capability for calibrating,
A low-cost portable handheld still-frame thermal camera for capture of calibrated digital thermographic infrared images having a lens assembly, a slideable linear array of uncooled 8-12 um thermal IR sensors, a slider actuation mechanism, and associated digital processing capability for calibrating, displaying, and storing images captured by the camera. The sensors are preferably thermoelectric sensors. The lens passes infrared radiation, the array is contained in an evacuated chamber, and operates at room temperature. The thermographic images may be displayed immediately or remotely or may be printed by conventional techniques.
대표청구항
▼
A infrared camera including a camera housing for enclosing and supporting components for capturing a two dimensional infrared image of a scene which emits thermal radiation, the infrared camera comprising: a focusing lens rigidly attached to a camera housing for transmitting infrared radiation there
A infrared camera including a camera housing for enclosing and supporting components for capturing a two dimensional infrared image of a scene which emits thermal radiation, the infrared camera comprising: a focusing lens rigidly attached to a camera housing for transmitting infrared radiation therethrough and focusing a two dimensional infrared image of said scene at an image focal plane perpendicular to an optical axis of said focusing lens; thermoelectric sensor array assembly means including a plurality of linearly arranged thermoelectric sensors, Sm, aligned with a sensor reference axis passing through said plurality of sensors, each of said plurality of thermoelectric sensors being capable of providing raw infrared sensor information, Rm, in response to sensed infrared radiation impinging thereon, and where M is the number of said plurality of linearly arranged thermoelectric sensors and where “m”designates the mth position along said sensor reference axis; support means for rigidly supporting said linear thermoelectric sensor array assembly means; linear scanning means, responsive to a command signal, for controllably moving said support means to discrete scan positions, Pn, along a reference scan axis perpendicular to said optical axis, said support means coupled to and arranged relative to said scanning means such that said sensor reference axis is substantially perpendicular to said reference scan axis and said optical axis, where “n”represents nth position along said reference scan axis, and where said linear scanning means is capable of moving said plurality of thermoelectric sensors in alignment with said focal plane so as to be responsive to said infrared image; storage means for storing unique thermoelectric sensor calibration information, Cmn, for each one of said sensors, Sm, and corresponding discrete scan positions, Pn, where said unique sensor calibration information is related to unique raw infrared sensor information of each of said plurality of said thermoelectric sensors at said discrete scan positions in response to known infrared radiation passing through said focusing lens and impinging thereon; and signal processing means for, providing said command signal such that said scanning means controllably moves said support means to successive ones of said discrete scan positions, Pn, for a selected measurement time, such that at least some of said plurality of sensors, Sm, pass through the field of view of said infrared image in the direction of said scan axis, and provide said raw infrared sensor information for each discrete scan position, Rmn, in response to any infrared radiation impinging thereon, where Rmn represents said raw infrared sensor information for the mth thermoelectric sensor at the nth discrete scan position, and deriving corrected infrared sensor information, Qmn, for each of said plurality of thermoelectric sensors, Sm, at each of said discrete scan positions, Pn, as a function of corresponding ones of said raw infrared sensor information, Rmn, and said thermoelectric sensor calibration information, Cmn, and said corrected infrared sensor information, Qmn, represents corrected raw infrared information associated with the mth thermoelectric sensor at the nth discrete scan position.
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