JPH0648361Y2 - Infrared detector - Google Patents
Infrared detectorInfo
- Publication number
- JPH0648361Y2 JPH0648361Y2 JP1471989U JP1471989U JPH0648361Y2 JP H0648361 Y2 JPH0648361 Y2 JP H0648361Y2 JP 1471989 U JP1471989 U JP 1471989U JP 1471989 U JP1471989 U JP 1471989U JP H0648361 Y2 JPH0648361 Y2 JP H0648361Y2
- Authority
- JP
- Japan
- Prior art keywords
- infrared
- nozzle
- jet
- cooler
- pipe
- 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.)
- Expired - Lifetime
Links
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Radiation Pyrometers (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は,赤外線を検知して信号を発生する素子を搭
載する赤外線検出器と,上記素子を冷却するための冷却
器を備えた,赤外線検出装置に関するものである。[Detailed Description of the Invention] [Industrial field of application] This invention is an infrared ray detector equipped with an infrared ray detector equipped with an element for detecting infrared rays and generating a signal, and a cooler for cooling the element. The present invention relates to a detection device.
第2図は従来の赤外線検出装置を示す断面図であり,図
において(1)は赤外線検知素子,(2)は上記赤外線
検知素子(1)を内部に搭載する二重円筒構造をした赤
外線検出器,(3)はジュールトムソン効果を利用して
極低温まで冷却することのできる冷却器を構成するノズ
ル,(4)は上記冷却器を構成する,外側に熱交換用フ
ィンの付いた第1のパイプ,(5)は上記冷却器を構成
する断熱糸,(6)は上記冷却器を構成する円柱体,
(7)は上記冷却器を構成する第2のパイプ,(8)は
上記ノズル(3)から吹き出した噴流である。FIG. 2 is a cross-sectional view showing a conventional infrared detecting device. In the figure, (1) is an infrared detecting element, and (2) is an infrared detecting having a double cylindrical structure in which the infrared detecting element (1) is mounted inside. (3) is a nozzle that constitutes a cooler that can cool to an extremely low temperature by utilizing the Joule-Thomson effect, and (4) is the above-mentioned cooler that has a heat exchange fin on the outside. Pipe, (5) is a heat insulating thread that constitutes the cooler, (6) is a columnar body that constitutes the cooler,
(7) is a second pipe constituting the cooler, and (8) is a jet flow blown from the nozzle (3).
従来の赤外線検出装置は上記のように構成され上記第2
のパイプ(7)に図示されていない高圧気体供給装置か
ら高圧気体を供給し,上記高圧気体は,上記円柱体
(6)の周囲に巻かれた上記第1のパイプ(4)を熱交
換しながら流れ,上記ノズル(3)を通り,このときジ
ュールトムソン効果により上記高圧気体の温度が低下し
ながら,上記噴流(8)となり,上記噴流(8)は時間
とともに上記高圧気体の液化温度まで温度が低下し,上
記赤外線検出装置(2)に搭載された上記赤外線検知素
子(1)を冷却し,赤外線を検知した素子が発生する信
号を図示されていない外部の信号処理回路にに送ること
により,赤外線を検出することができる。上記断熱糸
(5)は上記噴流(8)となった高圧気体が排出される
ときに上記第1のパイプ(4)において効率良く熱交換
がなされる目的で設置したものである。The conventional infrared detecting device is constructed as described above and has the above-mentioned second structure.
The high pressure gas is supplied to the pipe (7) from a high pressure gas supply device (not shown), and the high pressure gas exchanges heat with the first pipe (4) wound around the cylindrical body (6). While flowing through the nozzle (3), the temperature of the high-pressure gas is lowered by the Joule-Thomson effect at this time, and becomes the jet flow (8), and the jet flow (8) is heated to the liquefaction temperature of the high-pressure gas with time. By cooling the infrared detecting element (1) mounted on the infrared detecting device (2) and sending the signal generated by the element detecting infrared rays to an external signal processing circuit (not shown). , Can detect infrared rays. The heat insulating thread (5) is installed for the purpose of efficiently exchanging heat in the first pipe (4) when the high pressure gas that has become the jet stream (8) is discharged.
上記のような従来の赤外線検出装置においては次のよう
な解決すべき課題があった。すなわち従来の赤外線検出
装置では,冷却器のノズル(3)から吹き出す気体の液
化温度まで冷却された噴流(8)が,赤外線検出器
(2)の赤外線検知素子(1)が設置された近傍部分に
直接衝突し,噴流が気液混相流であることなどの原因か
ら噴流(8)が衝突した部分で温度変動が生じ,その温
度変動が,赤外線検知素子(1)まで伝達され,感度の
変化を引き起こし雑音となるため,その雑音を低減させ
なければならないという課題があった。The conventional infrared detecting device as described above has the following problems to be solved. That is, in the conventional infrared detection device, the jet stream (8) cooled to the liquefaction temperature of the gas blown out from the nozzle (3) of the cooler is located near the infrared detection element (1) of the infrared detector (2). Temperature change occurs at the part where the jet (8) collides due to the fact that the jet directly collides with the jet and the jet is a gas-liquid multiphase flow. The temperature change is transmitted to the infrared detection element (1) and the sensitivity changes. However, there is a problem that it is necessary to reduce the noise.
この考案は,このような課題を解決するためになされた
もので,赤外線検出素子をジュールトムソン効果を利用
した冷却器で冷却する,雑音の低い赤外線検出装置を得
ることを目的とする。The present invention has been made in order to solve such a problem, and an object thereof is to obtain an infrared detecting device with low noise in which an infrared detecting element is cooled by a cooler utilizing the Joule-Thomson effect.
この考案に係る赤外線検出装置は,冷却器のノズルの向
きを斜めにして,ノズルを2ケ所もうけノズルから吹き
出す噴流の方向を拡散するようにしたものである。In the infrared detector according to the present invention, the direction of the nozzle of the cooler is slanted so that two nozzles are provided and the direction of the jet flow blown out from the nozzle is diffused.
この考案においては冷却器のノズルの向きを斜めにし,
ノズルを2ケ所もうけ,噴流を拡散させ赤外線検知素子
が設置された近傍部分に直接噴流が衝突しなくなるため
噴流衝突により生じる温度変動が赤外線検知素子に伝達
しにくくなり,その結果感度変化が起こりにくくなり,
雑音が低減できる。In this device, the direction of the cooler nozzle is slanted,
Since there are two nozzles and the jet is diffused and the jet does not directly collide with the vicinity where the infrared detector is installed, temperature fluctuations caused by jet collision are less likely to be transmitted to the infrared detector, resulting in less sensitivity change. Becomes
Noise can be reduced.
第1図はこの考案の一実施例を示す断面図であり,図に
おいて(1)は赤外線検知素子,(2)は赤外線検出
器,(4)は第1のパイプ,(5)は断熱糸,(6)は
円柱体,(7)は第2のパイプ,(8)は噴流であり
(3)は斜めに2ケ所設置されたノズルである。FIG. 1 is a sectional view showing an embodiment of the present invention, in which (1) is an infrared detecting element, (2) is an infrared detector, (4) is a first pipe, and (5) is a heat insulating thread. , (6) is a cylindrical body, (7) is a second pipe, (8) is a jet flow, and (3) is a nozzle installed at two diagonal positions.
上記のように構成された赤外線検出装置において,上記
第2のパイプ(7)に図示されていない高圧気体供給装
置から高圧気体を供給し,上記高圧気体は,上記円柱体
(6)の周囲に巻かれた上記第1のパイプ(4)を熱交
換しながら流れ,上記ノズル(3)を通り,このときジ
ュールトムソン効果により上記高圧気体の温度が低下し
ながら,上記噴流(8)となり,上記噴流(8)は時間
とともに上記高圧気体の液化温度まで温度が低下し,上
記赤外線検出装置(2)に搭載された上記赤外線検知素
子(1)を冷却し,赤外線を検知した素子が発生する信
号を図示されていない外部の信号処理回路に送ることに
より,赤外線を検出できることは従来の装置と全く同じ
である。上記断熱糸(5)は,上記噴流(8)となつた
高圧気体が排出されるときに,上記第1のパイプ(4)
において効率良く熱交換がなされる目的で設置したこと
は従来の装置と全く同じである。In the infrared detecting device configured as described above, high pressure gas is supplied to the second pipe (7) from a high pressure gas supply device (not shown), and the high pressure gas is distributed around the columnar body (6). It flows through the wound first pipe (4) while exchanging heat, and passes through the nozzle (3). At this time, the temperature of the high-pressure gas is lowered by the Joule-Thomson effect, and becomes the jet flow (8). The temperature of the jet stream (8) decreases to the liquefaction temperature of the high-pressure gas with time, cools the infrared detection element (1) mounted on the infrared detection device (2), and a signal generated by the element detecting infrared rays is generated. Is sent to an external signal processing circuit (not shown), and infrared rays can be detected, which is exactly the same as the conventional device. The heat insulating thread (5) is provided with the first pipe (4) when the high pressure gas connected to the jet flow (8) is discharged.
It was installed in the same way as the conventional device for the purpose of efficient heat exchange.
しかしこの考案による赤外線検出装置では,上記ノズル
(3)の向きを斜めにし,2ケ所もうけ,上記噴流(8)
の方向を拡散させることができる。そのため上記ノズル
(3)から吹き出す上記噴流(8)が上記赤外線検知素
子(1)が設置された近傍部分に直接衝突しなくなるた
め,噴流衝突により生じる温度変動が上記赤外線検知素
子(1)に伝達しにくくなり,その結果感度変化が起こ
りにくくなり雑音が低減できる。However, in the infrared detection device according to the present invention, the nozzle (3) is inclined at two positions, and the jet (8) is provided.
The direction of can be diffused. Therefore, the jet flow (8) blown out from the nozzle (3) does not directly collide with the vicinity where the infrared detection element (1) is installed, and the temperature fluctuation caused by the jet collision is transmitted to the infrared detection element (1). As a result, sensitivity changes are less likely to occur and noise can be reduced.
この考案により以上説明したとおり冷却器のノズルの向
きを斜めにし2ケ所設置し,噴流の方向を拡散させ,噴
流衝突により生じる温度変動が原因である赤外線素子の
雑音を低減することができるという効果がある。As described above, according to this invention, the nozzle of the cooler is installed in two positions with the nozzle inclined, the direction of the jet flow is diffused, and the noise of the infrared element caused by the temperature fluctuation caused by the jet collision can be reduced. There is.
第1図はこの考案の一実施例を示す赤外線検出装置の断
面図,第2図は赤外線検出装置を示す断面図である。 図において(1)は赤外線検知素子,(2)は赤外線検
出器,(3)はノズル,(4)は第1のパイプ,(5)
は断熱糸,(6)は円柱体,(7)は第2のパイプ,
(8)は噴流である。 なお,図中同一符号は同一または相当部分を示す。FIG. 1 is a sectional view of an infrared detecting device showing an embodiment of the present invention, and FIG. 2 is a sectional view showing the infrared detecting device. In the figure, (1) is an infrared detecting element, (2) is an infrared detector, (3) is a nozzle, (4) is a first pipe, (5).
Is a heat insulating thread, (6) is a cylinder, (7) is a second pipe,
(8) is a jet flow. The same reference numerals in the drawings indicate the same or corresponding parts.
Claims (1)
造をした赤外線検出器と、上記赤外線検出素子を極低温
に冷却するためのジュールトムソン効果を利用した冷却
器を備えた赤外線検出装置において、上記冷却器の先端
部にある噴流を吹き出すノズルの向きを斜めにして2ケ
所設置し、上記ノズルから吹き出す噴流の方向を拡散さ
せる構造を持つことを特徴とする赤外線検出装置。1. An infrared detector having an infrared detector having a double cylinder structure in which an infrared detection element is mounted, and a cooler utilizing the Joule-Thomson effect for cooling the infrared detection element to an extremely low temperature. In the infrared detecting apparatus, the nozzle for ejecting the jet at the tip of the cooler is installed in two places with the direction of the nozzle inclined, and the direction of the jet ejected from the nozzle is diffused.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1471989U JPH0648361Y2 (en) | 1989-02-10 | 1989-02-10 | Infrared detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1471989U JPH0648361Y2 (en) | 1989-02-10 | 1989-02-10 | Infrared detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02107040U JPH02107040U (en) | 1990-08-24 |
JPH0648361Y2 true JPH0648361Y2 (en) | 1994-12-12 |
Family
ID=31226174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1471989U Expired - Lifetime JPH0648361Y2 (en) | 1989-02-10 | 1989-02-10 | Infrared detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0648361Y2 (en) |
-
1989
- 1989-02-10 JP JP1471989U patent/JPH0648361Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH02107040U (en) | 1990-08-24 |
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