JPH02130436A - Calibration for infrared radiation meter - Google Patents
Calibration for infrared radiation meterInfo
- Publication number
- JPH02130436A JPH02130436A JP63285019A JP28501988A JPH02130436A JP H02130436 A JPH02130436 A JP H02130436A JP 63285019 A JP63285019 A JP 63285019A JP 28501988 A JP28501988 A JP 28501988A JP H02130436 A JPH02130436 A JP H02130436A
- Authority
- JP
- Japan
- Prior art keywords
- infrared
- calibration
- different
- reference radiation
- emissivities
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000003384 imaging method Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Radiation Pyrometers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、被撮像物の赤外放射量を測定する赤外放射計
、特にその基準放射源による校正方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an infrared radiometer for measuring the amount of infrared radiation of an object to be imaged, and particularly to a calibration method thereof using a reference radiation source.
従来、この種の赤外放射計、特に人工衛星や飛行機等に
搭載される放射計では、放射計内部から放射による背景
雑音成分を除くために、基準黒体を用いた校正を行なっ
ており、感度の校正を行なうために、温度の異なる二つ
以上の基準黒体を用いている。Conventionally, this type of infrared radiometer, especially those mounted on artificial satellites and airplanes, have been calibrated using a reference blackbody in order to remove background noise components due to radiation from inside the radiometer. In order to calibrate the sensitivity, two or more reference blackbodies with different temperatures are used.
上述した従来の温度の異なる基準黒体を用いる校正方式
では、感度補正の精度を上げるために、常温の基準黒体
の他に、常温と数十底の温度差を持つ基準黒体を必要と
した。これは、特に人工衛星に搭載した場合には、多大
の電力を必要とし、また周囲環境に影響を及ぼし１周囲
の温度を変化させる。In the conventional calibration method described above that uses reference black bodies with different temperatures, in order to improve the accuracy of sensitivity correction, in addition to the reference black body at room temperature, a reference black body with a temperature difference of several tens of bases from room temperature is required. did. This requires a large amount of electric power, especially when mounted on an artificial satellite, and also affects the surrounding environment and changes the surrounding temperature.
本発明によれば、「赤外波長域の光を集光し電気信号に
変換することにより被測定物体からの赤外放射量を測定
する赤外放射計において、赤外放射率の異なる複数個の
基準放射源を用いることを特徴とする赤外放射計の校正
方式」が得られる。According to the present invention, in an infrared radiometer that measures the amount of infrared radiation from an object to be measured by condensing light in the infrared wavelength range and converting it into an electrical signal, A method for calibrating an infrared radiometer characterized by using a reference radiation source is obtained.
次に、本発明の一実施例を示した図面を参照して、本発
明をより詳細に説明する。Next, the present invention will be described in more detail with reference to the drawings showing one embodiment of the present invention.
第１図を参照すると、本発明の一実施例は、本発明をチ
ルト機能を持った機械走査式放射計に適用したものであ
る０本実施例は、赤外放射率の異なる二つの基準放射源
１ａおよび１ｂを有している。Referring to FIG. 1, one embodiment of the present invention is an application of the present invention to a mechanical scanning radiometer with a tilt function. It has sources 1a and 1b.
第１図は放射計の撮像時の構成を示しており、図面下方
からの撮像信号は、走査ミラー２により反射され、光学
系３により集光され、光電変換部４により電気信号に変
換される。光電変換部４は、冷却部５により冷却されて
いる。撮像は、走査ミラー２を走査駆動部６の回転によ
り行なう。FIG. 1 shows the configuration of the radiometer at the time of imaging. An imaging signal from the bottom of the drawing is reflected by a scanning mirror 2, focused by an optical system 3, and converted into an electrical signal by a photoelectric conversion unit 4. . The photoelectric conversion unit 4 is cooled by a cooling unit 5. Imaging is performed by rotating the scanning mirror 2 by a scanning drive unit 6.
撮像方向を変更するためのチルト機能を実現するために
チルト駆動部７を有している。A tilt drive unit 7 is provided to realize a tilt function for changing the imaging direction.
第２図を参照して、校正方式について説明する０校正時
には、チルト駆動部７により、走査ミラー２を基準放射
源１ａまたは１ｂの方向に向けることにより、校正光を
光学系３に導く。Referring to FIG. 2, during zero calibration, the calibration method will be described.The tilt drive section 7 directs the scanning mirror 2 toward the reference radiation source 1a or 1b, thereby guiding the calibration light to the optical system 3.
ここに示した実施例では、赤外放射率の異なる二つの基
準放射源により、背景雑音および感度の補正を行なう。In the embodiment shown here, background noise and sensitivity correction is performed using two reference radiation sources with different infrared emissivities.
また、本実施例の他に、回転走査鏡を用いた機械走査式
放射計にも適用できる。In addition to this embodiment, the present invention can also be applied to a mechanical scanning radiometer using a rotating scanning mirror.
以上説明したように、本発明によれば、赤外放射率の異
なる複数個の基準放射源を用いることにより、温度の異
なる黒体を用いる校正方式に比べ、低消費電力化するこ
とができる。また、基準放射源の温度を高温とする必要
がないので、周囲環境に対する温度上昇等の影響を少な
くできる。As described above, according to the present invention, by using a plurality of reference radiation sources with different infrared emissivities, power consumption can be reduced compared to a calibration method using black bodies with different temperatures. Furthermore, since it is not necessary to raise the temperature of the reference radiation source to a high temperature, the influence of temperature rise on the surrounding environment can be reduced.
第１図および第２図は本発明の一実施例による赤外放射
計のそれぞれ撮像時および校正時の構成を示す図である
。
ｌａ、ｌｂ・・・基準放射源、２・・・走査ミラー３・
・・光学系、４・・・光学変換部、５・・・冷却部、６
・・・走査駆動部、７・・・チルト駆動部。
代理人 弁理士 内 原 晋
第 １
図
第 ２ 口FIGS. 1 and 2 are diagrams showing the configuration of an infrared radiometer according to an embodiment of the present invention at the time of imaging and during calibration, respectively. la, lb...Reference radiation source, 2...Scanning mirror 3.
...Optical system, 4... Optical conversion section, 5... Cooling section, 6
... Scanning drive section, 7... Tilt drive section. Agent Patent Attorney Susumu Uchihara 1 Figure 2
Claims (1)
被測定物体からの赤外放射量を測定する赤外放射計にお
いて、赤外放射率の異なる複数個の基準放射源を用いる
ことを特徴とする赤外放射計の校正方式。In an infrared radiometer that measures the amount of infrared radiation from an object to be measured by condensing light in the infrared wavelength range and converting it into an electrical signal, multiple reference radiation sources with different infrared emissivities are used. A calibration method for infrared radiometers featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63285019A JPH02130436A (en) | 1988-11-10 | 1988-11-10 | Calibration for infrared radiation meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63285019A JPH02130436A (en) | 1988-11-10 | 1988-11-10 | Calibration for infrared radiation meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02130436A true JPH02130436A (en) | 1990-05-18 |
Family
ID=17686105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63285019A Pending JPH02130436A (en) | 1988-11-10 | 1988-11-10 | Calibration for infrared radiation meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02130436A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11132859A (en) * | 1997-10-31 | 1999-05-21 | Mitsubishi Electric Corp | Infrared video apparatus |
| CN102768107A (en) * | 2012-07-10 | 2012-11-07 | 武汉高德红外股份有限公司 | Nonuniformity correcting device and method by aiming at detector pixel response rate |
| WO2024121983A1 (en) * | 2022-12-07 | 2024-06-13 | 三菱電機株式会社 | Data processing device, data processing method, and data processing program |
-
1988
- 1988-11-10 JP JP63285019A patent/JPH02130436A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11132859A (en) * | 1997-10-31 | 1999-05-21 | Mitsubishi Electric Corp | Infrared video apparatus |
| CN102768107A (en) * | 2012-07-10 | 2012-11-07 | 武汉高德红外股份有限公司 | Nonuniformity correcting device and method by aiming at detector pixel response rate |
| WO2024121983A1 (en) * | 2022-12-07 | 2024-06-13 | 三菱電機株式会社 | Data processing device, data processing method, and data processing program |
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