JPS63201537A - Mechanical scanning type radiometer - Google Patents
Mechanical scanning type radiometerInfo
- Publication number
- JPS63201537A JPS63201537A JP62034299A JP3429987A JPS63201537A JP S63201537 A JPS63201537 A JP S63201537A JP 62034299 A JP62034299 A JP 62034299A JP 3429987 A JP3429987 A JP 3429987A JP S63201537 A JPS63201537 A JP S63201537A
- Authority
- JP
- Japan
- Prior art keywords
- scanning
- tilt
- mirror
- scanning mirror
- radiometer
- 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.)
- Granted
Links
- 238000012937 correction Methods 0.000 claims abstract description 35
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 238000003384 imaging method Methods 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、人工衛星あるいは航空機などの飛行体に搭載
され、走査鏡のチルト機能を有する機械走査式放射計の
改良に関し、特にチルト歪補正光学系を備えた機械走査
式放射計に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an improvement of a mechanical scanning radiometer that is mounted on a flying object such as an artificial satellite or an aircraft and has a scanning mirror tilting function, and particularly relates to the improvement of a mechanical scanning radiometer that is mounted on a flying object such as an artificial satellite or an aircraft and has a tilting function of a scanning mirror. This invention relates to a mechanical scanning radiometer equipped with an optical system.
（従来の技術およびその問題点）
放射計は人工衛星あるいは航空機などに搭載され地表や
海面の観測に用いられる０例えば、海色の観測に用いら
れる場合は、非常に微細な海面の色情報信号を扱うので
、海面における鏡面反射光が入射するのを避けるために
、走査鏡を飛行方向に対して傾斜させるチルト機能を備
えている。このタイプの放射計の例としては、ＮＩＭＢ
ＵＳ−７に搭載されているＣ Ｚ ＣＳ （Ｃｏａｓｔ
ａｌ ２ｏｎｅＣｏｌｕｒ ５ｃａｎｎｅｒ ）がある
。このようなチルト機能付放射計の走査鏡には走査軸の
他にチルト軸が設けられ、走査とチルトとか同時に行わ
れる。従って、走査軌跡と画像の両方に歪が生じる。そ
こで、これを解決するために次のように幾つかの方式が
行われている。方式Ａは、第２図に示すように、走査は
走査鏡３を回転させて行い、チルトは走査鏡３を揺動さ
せて行う方式である。方式Ｂは、第３図に示すように、
走査とチルトの両方を走査鏡３を揺動させて行う方式で
ある。また、方式Ｃは、第４図に示すように、走査とチ
ルトの両方を放射計全体を回転させて行う方式である。(Prior art and its problems) Radiometers are mounted on artificial satellites or aircraft and used to observe the earth's surface or sea surface. In order to avoid specular reflection from the sea surface, the scanner is equipped with a tilt function that tilts the scanning mirror relative to the direction of flight. An example of this type of radiometer is the NIMB
CZ CS (Coast
al2oneColur5canner). The scanning mirror of such a radiometer with a tilt function is provided with a tilt axis in addition to the scanning axis, and scanning and tilting are performed simultaneously. Therefore, distortion occurs in both the scanning trajectory and the image. In order to solve this problem, several methods have been used as described below. In method A, as shown in FIG. 2, scanning is performed by rotating the scanning mirror 3, and tilting is performed by swinging the scanning mirror 3. Method B, as shown in Figure 3,
This method performs both scanning and tilting by swinging the scanning mirror 3. Furthermore, as shown in FIG. 4, method C is a method in which both scanning and tilting are performed by rotating the entire radiometer.
これらいずれの方式でも入射光を電気信号に変換する光
電変換手段が備えである。一般に走査幅を拡げ、画像信
号のＳ／Ｎ比を高め、多バンドを実現する目的で光電変
換手段として複数個の検出器で構成され受光面積の広い
検出器アレイが用いられるが、その場合走査幅が広がっ
ただけチルド歪が著しくなる。方式Ａ、方式Ｂではこれ
を改善することができない、また、放射計を搭載した人
工衛星や航空機上でこの歪を補正しようとすれば、補正
装置を追加した分電量、消費電力ともに増加し、補正を
地上で行えば、例えば漁船のようなユーザの受信処理装
置が大型化するという問題が生じる。また、方式Ｃによ
れば、チルト歪は改善されるが、この方式では放射計全
体を回転させるから駆動機構が大型になること、放射計
を人工衛星に搭載した場合は放射計全体が回転すること
によって人工衛星の姿勢制御系に対する外乱トルクが増
大すること、および赤外線検出器を冷却するための放射
冷却器の視野設計に制約が加わることなどの問題がある
。All of these systems are equipped with photoelectric conversion means for converting incident light into an electrical signal. Generally, in order to widen the scanning width, increase the S/N ratio of the image signal, and realize multiple bands, a detector array consisting of multiple detectors and having a wide light receiving area is used as a photoelectric conversion means. The wider the width, the more significant the chilled distortion becomes. Methods A and B cannot improve this, and if you try to correct this distortion on an artificial satellite or aircraft equipped with a radiometer, the amount of electricity distributed and power consumption will increase due to the addition of the correction device. If the correction is performed on the ground, a problem arises in that the reception processing device of a user such as a fishing boat becomes larger. Also, according to method C, tilt distortion is improved, but in this method, the entire radiometer is rotated, so the drive mechanism becomes large, and when the radiometer is mounted on an artificial satellite, the entire radiometer rotates. This results in problems such as an increase in disturbance torque for the satellite's attitude control system and restrictions on the field-of-view design of the radiation cooler for cooling the infrared detector.
本発明の目的は、放射計の内部でチルト歪の補正を行い
、従って周辺機器や端末機器に上記のような負担を与え
ないｉ械走査式放射計を提供することにある。An object of the present invention is to provide an i-machine scanning radiometer that corrects tilt distortion within the radiometer and therefore does not impose the above-mentioned burden on peripheral equipment and terminal equipment.
（問題点を解決するための手段）
本発明の機械走査式放射計は、走査運動を行いながら被
撮像体からの光線を反射する走査鏡と、この走査鏡を駆
動して前記走査運動をさせる駆動制御装置と、前記走査
鏡にチルト運動をさせるチルト手段と、前記走査鏡の反
射光を入光して電気信号に変換する光電変換手段とを有
する機械走査式放射計において、前記光電変換手段に入
射する前記入射光の光軸上に配置され前記走査鏡からの
反射光を入光し出射するチルト歪補正手段と、このチル
ト歪補正手段を前記走査鏡のチルトと反対方向へチルト
歪を打消す角度だけ傾斜させるチルト歪補正手段駆動制
御装置と、前記チルト歪補正手段からの出射光を入光し
出射する結像ライン補正手段と、この結像ライン補正手
段の位置を変えて出射光を前記光電変換手段へ導く結像
ライン補正手段駆動制御装置とを設けたことを特徴とす
る。(Means for Solving the Problems) The mechanical scanning radiometer of the present invention includes a scanning mirror that reflects light from an object to be imaged while performing a scanning motion, and a scanning mirror that is driven to perform the scanning motion. A mechanical scanning radiometer comprising a drive control device, a tilting means for tilting the scanning mirror, and a photoelectric conversion means for receiving reflected light from the scanning mirror and converting it into an electrical signal, the photoelectric conversion means a tilt distortion correction means disposed on the optical axis of the incident light that enters and outputs the reflected light from the scanning mirror; and a tilt distortion correction means that corrects tilt distortion in a direction opposite to the tilt of the scanning mirror. a tilt distortion correction means drive control device that tilts by an angle to cancel; an imaging line correction means that receives and outputs the light emitted from the tilt distortion correction means; and an imaging line correction means that changes the position of the imaging line correction means to adjust the output light and an imaging line correction means drive control device that guides the image forming line to the photoelectric conversion means.
（実施例）
第１図に本発明の一実施例を示す０本実施例では、光電
変換手段に検出器アレ・イ４を、チルト歪補正手段とし
てチルト軸回り補正ミラー１を、結像ライン補正手段と
して結像ライン補正ミラー２をそれぞれ用いた。ｔた、
走査鏡３とチルト軸回り補正ミラー１との間に走査鏡３
からの反射光を集光してチルト軸回り補正ミラー１へ導
くための反射光学系５を置いた。走査鏡３はその駆動制
御装置（図示していない。）に駆動されて走査軸３ａを
中心に揺動するとともに、チルト手段（図示していない
。）に駆動されてチルト軸３ｂを中心にチルトする。矢
印が示すように、被撮像体からの入射光は走査鏡３で反
射して反射光学系５へ入射し、その光軸上に配置された
チルト軸回り補正ミラー１へ導かれる。チルト軸回り補
正ミラー１はその駆動制御装置（図示していない、）に
よって走査鏡３と逆方向にそのチルト角と同じ角度だけ
回転することにより、走査軌跡と画像のチルト歪を打消
し補正する。このチルト軸回り補正ミラー１が傾斜した
だけ結像ライン（光軸）も傾斜するから、結像ライン補
正手段駆動制御装置（図示していない、）は結像ライン
補正ミラー２の位置と角度を変えてチルト軸回り補正ミ
ラー１からの出射光を検出器アレイ４へ導く。(Embodiment) FIG. 1 shows an embodiment of the present invention. In this embodiment, a detector array 4 is used as a photoelectric conversion means, a tilt axis correction mirror 1 is used as a tilt distortion correction means, and an imaging line An imaging line correction mirror 2 was used as a correction means. It was,
A scanning mirror 3 is installed between the scanning mirror 3 and the tilt axis correction mirror 1.
A reflective optical system 5 is provided to collect the reflected light from the mirror and guide it to the tilt axis correction mirror 1. The scanning mirror 3 is driven by its drive control device (not shown) to swing around the scanning axis 3a, and is also driven by a tilting means (not shown) to tilt around the tilt axis 3b. do. As indicated by the arrow, the incident light from the object to be imaged is reflected by the scanning mirror 3, enters the reflective optical system 5, and is guided to the tilt axis correction mirror 1 arranged on the optical axis. The tilt axis correction mirror 1 is rotated in the opposite direction to the scanning mirror 3 by the same angle as its tilt angle by its drive control device (not shown), thereby canceling out and correcting the tilt distortion of the scanning locus and image. . Since the imaging line (optical axis) also tilts as much as the tilt axis correction mirror 1 tilts, the imaging line correction means drive control device (not shown) adjusts the position and angle of the imaging line correction mirror 2. Then, the light emitted from the tilt axis correction mirror 1 is guided to the detector array 4.
なお、チルト歪補正手段と結像ライン補正手段とを走査
鏡３と反射光学系５の間に配置することもできるが、そ
の場合補正手段の口径が大きくなり従ってそれらの駆動
装置も大きくしなければならないから得策ではない。Note that the tilt distortion correction means and the imaging line correction means can be arranged between the scanning mirror 3 and the reflection optical system 5, but in that case, the aperture of the correction means becomes large and therefore the drive device for them must also be made large. It's not a good idea because it won't work.
（発明の効果）
このように、本発明の゛装置は放射計の内部で光学的に
チルト歪を補正するから、放射計を搭載した飛行体また
は端末ユーザの機器に従来のようにチルト歪を補正する
ための特別な装置を装備する必要がない、チルト歪が特
に大きく表われる検出器アレイを用いた場合、本発明の
効果は顕著である。(Effects of the Invention) As described above, since the device of the present invention optically corrects tilt distortion inside the radiometer, it is possible to correct tilt distortion in an aircraft equipped with a radiometer or in equipment of a terminal user, unlike conventional methods. The effects of the present invention are significant when using a detector array in which tilt distortion is particularly large, and there is no need to equip a special device for correction.
第１図は本発明の一実施例の構成を示す斜視図である。
第２図ないし第４図はそれぞれ従来の機械走査式放射計
の方式Ａ、Ｂ、Ｃを示す図面であり、各図（ａ）は構成
を示す斜視図、各国（ｂ）は走査軌跡を示す概念図、各
図（ｃ）は像の回転を示す概念図である。
１・・・チルト軸回り補正ミラー、２・・・結像ライン
補正ミラー、３・・・走査鏡、３ａ・・・走査軸、３ｂ
・・・チルト軸、４・・・検出器アレイ、５・・・反射
光学系。FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention. Figures 2 to 4 are drawings showing conventional mechanical scanning radiometer methods A, B, and C, respectively, with each figure (a) being a perspective view showing the configuration, and each country (b) showing the scanning locus. Conceptual diagram, each figure (c) is a conceptual diagram showing rotation of an image. DESCRIPTION OF SYMBOLS 1... Tilt axis correction mirror, 2... Imaging line correction mirror, 3... Scanning mirror, 3a... Scanning axis, 3b
...Tilt axis, 4...Detector array, 5...Reflection optical system.
Claims (1)
査鏡と、この走査鏡を駆動して前記走査運動をさせる駆
動制御装置と、前記走査鏡にチルト運動をさせるチルト
手段と、前記走査鏡の反射光を入光して電気信号に変換
する光電変換手段とを有する機械走査式放射計において
、前記光電変換手段に入射する前記入射光の光軸上に配
置され前記走査鏡からの反射光を入光し出射するチルト
歪補正手段と、このチルト歪補正手段を前記走査鏡のチ
ルトと反対方向へチルト歪を打消す角度だけ傾斜させる
チルト歪補正手段駆動制御装置と、前記チルト歪補正手
段からの出射光を入光し出射する結像ライン補正手段と
、この結像ライン補正手段の位置を変えて出射光を前記
光電変換手段へ導く結像ライン補正手段駆動制御装置と
を設けたことを特徴とする機械走査式放射計。a scanning mirror that reflects light from an object to be imaged while performing a scanning motion; a drive control device that drives the scanning mirror to perform the scanning motion; a tilting device that causes the scanning mirror to perform a tilting motion; and a photoelectric conversion means for converting the reflected light from the scanning mirror into an electric signal, the mechanical scanning radiometer is arranged on the optical axis of the incident light that enters the photoelectric conversion means, and the reflected light from the scanning mirror is arranged on the optical axis of the incident light that enters the photoelectric conversion means. a tilt distortion correction means for inputting and outputting light, a tilt distortion correction means drive control device for tilting the tilt distortion correction means in a direction opposite to the tilt of the scanning mirror by an angle that cancels the tilt distortion, and the tilt distortion correction means and an imaging line correction means drive control device that changes the position of the imaging line correction means and guides the output light to the photoelectric conversion means. A mechanical scanning radiometer featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62034299A JPH07119648B2 (en) | 1987-02-17 | 1987-02-17 | Mechanical scanning radiometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62034299A JPH07119648B2 (en) | 1987-02-17 | 1987-02-17 | Mechanical scanning radiometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63201537A true JPS63201537A (en) | 1988-08-19 |
| JPH07119648B2 JPH07119648B2 (en) | 1995-12-20 |
Family
ID=12410279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62034299A Expired - Lifetime JPH07119648B2 (en) | 1987-02-17 | 1987-02-17 | Mechanical scanning radiometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07119648B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2015068395A1 (en) * | 2013-11-08 | 2017-03-09 | 国立大学法人東京工業大学 | Sensing device and sensing method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101068129B1 (en) * | 2009-11-06 | 2011-09-28 | 국방과학연구소 | Tilt mirror mechanism, ir detecting system having the same and control method of tilt mirror mechanism |
-
1987
- 1987-02-17 JP JP62034299A patent/JPH07119648B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2015068395A1 (en) * | 2013-11-08 | 2017-03-09 | 国立大学法人東京工業大学 | Sensing device and sensing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07119648B2 (en) | 1995-12-20 |
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