JPH08261821A - Infrared detector - Google Patents
Infrared detectorInfo
- Publication number
- JPH08261821A JPH08261821A JP7067952A JP6795295A JPH08261821A JP H08261821 A JPH08261821 A JP H08261821A JP 7067952 A JP7067952 A JP 7067952A JP 6795295 A JP6795295 A JP 6795295A JP H08261821 A JPH08261821 A JP H08261821A
- Authority
- JP
- Japan
- Prior art keywords
- inner cylinder
- cold finger
- infrared
- infrared detection
- disc
- 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
- 125000006850 spacer group Chemical group 0.000 claims abstract description 39
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 45
- 238000005192 partition Methods 0.000 claims description 30
- 238000005187 foaming Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000000638 solvent extraction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 229920002799 BoPET Polymers 0.000 description 4
- 239000005041 Mylar™ Substances 0.000 description 4
- 239000013013 elastic material Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000004088 foaming agent Substances 0.000 description 3
- 230000003405 preventing effect Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
- F25D19/006—Thermal coupling structure or interface
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Radiation Pyrometers (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】コールドフィンガの発明は、３０
Ｋ〜１００Ｋに冷却して動作させる赤外線検知素子と、
前記赤外線検知素子を３０Ｋ〜１００Ｋに冷却する冷凍
機を備えた赤外線検知装置に関するものである。BACKGROUND OF THE INVENTION The invention of cold fingers is 30
An infrared detection element which is cooled to K to 100K and is operated;
The present invention relates to an infrared detection device including a refrigerator that cools the infrared detection element to 30K to 100K.
【０００２】[0002]
【従来の技術】図５は、従来装置の構成図である。図に
おいて、１は赤外線検知素子、２は一端を円板３で封止
された管状の内筒４と、前記内筒４を覆う外殻５と前記
赤外線検知素子１に赤外線が入光するように前記外殻５
の先端に設けられた赤外線透過材料例えばゲルマニウム
製のウインドー６で形成され、前記内筒４と前記外殻５
と前記ウインドー６で囲まれた空間を真空にできるデュ
ワで、前記赤外線検知素子１は前記円板３の前記内筒４
と反対側の面に取付けられている。７は前記デュワ２内
部の前記赤外線検知素子１を低温に冷却する冷凍機で、
前記冷凍機としてはスターリングサイクルやギフォード
マクマホンサイクルなどの冷凍サイクルを利用したもの
がよく用いられ、図５ではその一例としてスターリング
サイクルを利用した冷凍機を示した。前記冷凍機７は、
電動圧縮機８と膨張機９と連結管１０で構成され、前記
膨張機９はコールドフィンガ１１とフランジ１２を有
し、前記電動式圧縮機８に電力を供給して駆動させるこ
とにより、前記コールドフィンガ１１先端部にて冷凍を
発生する構造となっている。前記冷凍機７の前記コール
ドフィンガ１１は、前記デュワ２の前記内筒４内側に挿
入され、前記コールドフィンガ１１の先端と前記内筒２
先端の前記円板３が接触するように固定されている。2. Description of the Related Art FIG. 5 is a block diagram of a conventional device. In the figure, 1 is an infrared detecting element, 2 is a tubular inner cylinder 4 having one end sealed with a disc 3, an outer shell 5 covering the inner cylinder 4 and the infrared detecting element 1 so that infrared light enters. To the outer shell 5
The inner cylinder 4 and the outer shell 5 are made of an infrared ray transmitting material provided at the tip of the window, for example, a window 6 made of germanium.
With the dewar that can create a vacuum in the space surrounded by the window 6, the infrared detection element 1 is the inner cylinder 4 of the disk 3.
It is attached to the surface opposite to. 7 is a refrigerator for cooling the infrared detecting element 1 inside the dewar 2 to a low temperature,
As the refrigerator, a refrigerator utilizing a Stirling cycle or a Gifford McMahon cycle is often used, and FIG. 5 shows a refrigerator utilizing the Stirling cycle as an example thereof. The refrigerator 7 is
It is composed of an electric compressor 8, an expander 9 and a connecting pipe 10. The expander 9 has a cold finger 11 and a flange 12, and by supplying electric power to the electric compressor 8 to drive it, the cold The structure is such that freezing is generated at the tips of the fingers 11. The cold finger 11 of the refrigerator 7 is inserted inside the inner cylinder 4 of the dewar 2, and the tip of the cold finger 11 and the inner cylinder 2 are inserted.
The disk 3 at the tip is fixed so as to come into contact.
【０００３】次に動作について説明する。コールドフィ
ンガ１１先端部に冷熱を発生させると、赤外線検知素子
１はデュワ２の内筒４先端に取付けられた円板３を介し
て常温から低温例えば７７Ｋまで冷却され、赤外線検知
素子１自身が発する熱雑音が少なくなり動作可能状態と
なる。低温例えば７７Ｋまで冷却された赤外線検知素子
１は、ウインドー６を透過して入光する赤外線を検知す
る。このとき、赤外線検知素子１は内筒４と外殻５の間
の空間内で円板３の内筒４が接合されている面と反対側
の面に取付けられているため、内筒４と外殻５の間の空
間を真空にして周囲から断熱することにより、赤外線検
知素子１へ周囲からの熱侵入が小さくなって、冷凍機７
の負荷が軽減される構成としている。Next, the operation will be described. When cold heat is generated at the tip of the cold finger 11, the infrared detection element 1 is cooled from room temperature to a low temperature, for example, 77K through the disc 3 attached to the tip of the inner cylinder 4 of the dewar 2, and the infrared detection element 1 itself emits it. The thermal noise is reduced and the operation is ready. The infrared detecting element 1 cooled to a low temperature of, for example, 77K detects infrared rays that pass through the window 6 and enter. At this time, since the infrared detecting element 1 is attached to the surface of the disk 3 opposite to the surface where the inner cylinder 4 is joined in the space between the inner cylinder 4 and the outer shell 5, The space between the outer shells 5 is evacuated to insulate it from the surroundings, so that heat from the surroundings into the infrared detection element 1 is reduced, and the refrigerator 7
It is configured to reduce the load of.
【０００４】[0004]
【発明が解決しようとする課題】上記のような従来装置
には、以下に述べるような問題点があった。冷凍機のコ
ールドフィンガを内筒に挿入し、コールドフィンガの先
端部と内筒先端の円板を接触するように固定した状態で
は、コールドフィンガと内筒の間に空気層が存在する。
前記のような状態で、赤外線検知素子を冷却するために
コールドフィンガ先端部に冷熱を発生させると、内筒の
円板付近が低温となる一方、内筒の膨張機のフランジ付
近は常温であるため、コールドフィンガと内筒との間に
ある空気層にも円板付近と膨張機のフランジ付近で温度
が生じ、コールドフィンガと内筒との間の空気層で空気
対流が発生する。前記のように発生する空気対流が膨張
機付近の温かい空気を円板付近に運ぶことにより、円板
を介して赤外線検知素子への熱侵入が増加し、冷凍機の
負荷が増大するため、消費電力が大きくなるという問題
が生じた。The conventional device as described above has the following problems. When the cold finger of the refrigerator is inserted into the inner cylinder and the tip of the cold finger and the disk at the tip of the inner cylinder are fixed so as to contact each other, an air layer exists between the cold finger and the inner cylinder.
When cold heat is generated at the tip of the cold finger in order to cool the infrared detection element in the above-mentioned state, the temperature near the disk of the inner cylinder becomes low, while the temperature near the flange of the expander of the inner cylinder is room temperature. Therefore, a temperature is also generated in the air layer between the cold finger and the inner cylinder near the disk and the flange of the expander, and air convection is generated in the air layer between the cold finger and the inner cylinder. As the air convection generated as described above carries warm air near the expander to the vicinity of the disk, heat intrusion to the infrared detection element increases through the disk, and the load on the refrigerator increases, so consumption There was the problem of increased power.
【０００５】この発明は、かかる問題点を解決するため
になされたもので、コールドフィンガと内筒との間で発
生する空気対流を押さえ内筒先端部への熱侵入を減少さ
せることにより、冷凍機の負荷を軽減して消費電力の低
減をはかることを目的としている。The present invention has been made to solve the above problems, and suppresses air convection generated between the cold finger and the inner cylinder to reduce heat intrusion into the tip of the inner cylinder, thereby refrigerating. The purpose is to reduce the load on the machine to reduce power consumption.
【０００６】[0006]
【課題を解決するための手段】この発明の実施例１によ
る赤外線検知装置は、コールドフィンガと内筒の間にス
ペーサを設けた。In the infrared detector according to the first embodiment of the present invention, a spacer is provided between the cold finger and the inner cylinder.
【０００７】また、この発明の実施例２による赤外線検
知装置は、実施例１のスペーサを低熱伝導な弾性体製と
した。Further, in the infrared detector according to the second embodiment of the present invention, the spacer of the first embodiment is made of an elastic body having a low thermal conductivity.
【０００８】また、この発明の実施例３による赤外線検
知装置は、実施例１のスペーサを発泡フォーミング剤製
とした。Also, in the infrared detector according to the third embodiment of the present invention, the spacer of the first embodiment is made of a foaming forming agent.
【０００９】また、この発明の実施例４による赤外線検
知装置は、実施例１のスペーサを低熱伝導薄肉シートを
コールドフィンガに巻き付けたものとした。The infrared detector according to the fourth embodiment of the present invention has the spacer of the first embodiment in which a low heat conductive thin sheet is wrapped around a cold finger.
【００１０】また、この発明の実施例５による赤外線検
知装置は、コールドフィンガと内筒の間を輪切り状に仕
切る間仕切りを設けた。Further, the infrared detector according to the fifth embodiment of the present invention is provided with a partition for partitioning the cold finger and the inner cylinder into a circular slice.
【００１１】また、この発明の実施例６による赤外線検
知装置は、実施例５の間仕切りを低熱伝導薄肉シート製
とした。Further, in the infrared detector according to the sixth embodiment of the present invention, the partition of the fifth embodiment is made of a low heat conductive thin sheet.
【００１２】また、この発明の実施例７による赤外線検
知装置は、実施例６の低熱伝統薄肉シート製間仕切りを
押さえるストッパを設けた。In addition, the infrared detector according to the seventh embodiment of the present invention is provided with a stopper that holds the low heat traditional thin sheet partition of the sixth embodiment.
【００１３】また、この発明の実施例８による赤外線検
知装置は、実施例７のストッパを低熱伝導な弾性体製と
した。Further, in the infrared detector according to the eighth embodiment of the present invention, the stopper of the seventh embodiment is made of an elastic body having a low heat conductivity.
【００１４】[0014]
【作用】この発明の実施例１によれば、コールドフィン
ガと内筒の間にスペーサを設けることで、コールドフィ
ンガと内筒の間で発生する空気対流を抑制することがで
きるため、フランジ付近の温かい空気が円板付近に運ば
れることがなくなり、円板を介して赤外線検知素子へ侵
入する熱が減少する。よって、冷凍機が低温例えば７７
Ｋに赤外線検知素子を冷却する際の負荷が小さいため、
冷凍機の消費電力が少なくなる。According to the first embodiment of the present invention, since the spacer is provided between the cold finger and the inner cylinder, the air convection generated between the cold finger and the inner cylinder can be suppressed. Warm air is not carried to the vicinity of the disc, and heat entering the infrared detecting element through the disc is reduced. Therefore, the refrigerator has a low temperature, for example, 77
Because the load when cooling the infrared detection element to K is small,
The refrigerator consumes less power.
【００１５】また、この発明の実施例２によれば、実施
例１のスペーサを弾力性を利用してコールドフィンガと
内筒に密着した状態で装着することができ、かつスペー
サ自体の熱伝導により赤外線検知素子に侵入する熱を少
なく押さえることができる。Further, according to the second embodiment of the present invention, the spacer of the first embodiment can be mounted in close contact with the cold finger and the inner cylinder by utilizing elasticity, and the spacer itself conducts heat. The heat that enters the infrared detection element can be reduced.
【００１６】また、この発明の実施例３によれば、実施
例１のスペーサをコールドフィンガと内筒に完全に密着
した状態で装着することができ、かつスペーサ自体の熱
伝導により赤外線検知素子に侵入する熱を少なく押さえ
ることができる。Further, according to the third embodiment of the present invention, the spacer of the first embodiment can be mounted in a state in which the cold finger and the inner cylinder are completely in close contact with each other, and the infrared sensing element is mounted on the infrared sensing element by heat conduction of the spacer itself. The heat that invades can be suppressed.
【００１７】また、この発明の実施例４によれば、実施
例１のスペーサを容易に装着することができ、かつスペ
ーサ自体の熱伝導により赤外線検知素子に侵入する熱を
少なく押さえることができる。Further, according to the fourth embodiment of the present invention, the spacer of the first embodiment can be easily mounted, and heat entering the infrared detecting element due to heat conduction of the spacer itself can be suppressed.
【００１８】また、この発明の実施例５による赤外線検
知素子は、コールドフィンガと内筒の間の空間を輪切り
状に仕切るように間仕切りを設けることにより、コール
ドフィンガと内筒の間の空間で発生する空気対流を抑制
することができるため、フランジ付近の温かい空気が円
板付近に運ばれることがなくなり、円板を介して赤外線
検知素子へ侵入する熱が減少する。よって、冷凍機が低
温例えば７７Ｋに赤外線検知素子を冷却する際の負荷が
小さいため、冷凍機の消費電力が少なくなる。The infrared detecting element according to the fifth embodiment of the present invention is generated in the space between the cold finger and the inner cylinder by providing a partition so as to partition the space between the cold finger and the inner cylinder into a circular slice. Since the air convection that occurs can be suppressed, warm air in the vicinity of the flange is not carried to the vicinity of the disk, and the heat that enters the infrared detection element via the disk is reduced. Therefore, since the load when the refrigerator cools the infrared detection element to a low temperature, for example, 77K, is small, the power consumption of the refrigerator is reduced.
【００１９】また、この発明の実施例６によれば、実施
例５の間仕切り自体の熱伝導により赤外線検知素子に侵
入する熱を少なく押さえることができる。Further, according to the sixth embodiment of the present invention, it is possible to suppress heat entering the infrared detecting element by heat conduction of the partition itself of the fifth embodiment.
【００２０】また、この発明の実施例７によれば、実施
例６の間仕切りをストッパで押さえることにより対流防
止効果を確実に得ることができる。According to the seventh embodiment of the present invention, the convection preventing effect can be surely obtained by pressing the partition of the sixth embodiment with the stopper.
【００２１】また、この発明の実施例８によれば、実施
例７のストッパを弾力性を利用して容易に装着すること
ができ、かつ熱伝導により赤外線検知素子に侵入する熱
を少なく押さえることができる。Further, according to the eighth embodiment of the present invention, the stopper of the seventh embodiment can be easily mounted by utilizing elasticity, and heat entering the infrared detecting element due to heat conduction can be suppressed to a small amount. You can
【００２２】[0022]
実施例１．図１は実施例１を示す構成図である。図１に
おいて赤外線検知素子１、デュワ２、冷凍機７は従来装
置とまったく同様であるため説明は省略する。１３は冷
凍機７のコールドフィンガ１１と内筒４の間の空気層を
埋めるように設けたスペーサである。Example 1. First Embodiment FIG. 1 is a configuration diagram showing a first embodiment. In FIG. 1, the infrared detection element 1, the dewar 2, and the refrigerator 7 are the same as those of the conventional device, and therefore the description thereof is omitted. Reference numeral 13 is a spacer provided so as to fill the air layer between the cold finger 11 of the refrigerator 7 and the inner cylinder 4.
【００２３】次に動作について説明する。冷凍機７のコ
ールドフィンガ１１先端部に冷熱を発生させて、前記コ
ールドフィンガ１１先端部に接触している円板３を介し
て赤外線検知素子１を冷却している状態において、コー
ルドフィンガ１１と内筒４の間の空気層をスペーサ１３
で埋めているため、コールドフィンガ１１と内筒４の間
の空気層で円板３付近とフランジ１２付近の空気の温度
差により発生する空気対流が抑制される。そのため、フ
ランジ１２付近の温かい空気が円板３付近に運ばれるこ
とがなくなり、円板３を介して赤外線検知素子１へ侵入
する熱が減少する。よって、冷凍機７が低温例えば７７
Ｋまで赤外線検知素子１を冷却する際の負荷が小さいた
め、冷凍機７の消費電力を低減することができる。Next, the operation will be described. In the state in which cold heat is generated at the tip of the cold finger 11 of the refrigerator 7 and the infrared detection element 1 is being cooled through the disk 3 which is in contact with the tip of the cold finger 11, the cold finger 11 and the inside of the cold finger 11 are cooled. Spacer 13 between the air layers between the cylinders 4
Since it is filled with, the air convection caused by the temperature difference between the air near the disk 3 and the air near the flange 12 in the air layer between the cold finger 11 and the inner cylinder 4 is suppressed. Therefore, warm air in the vicinity of the flange 12 is not carried to the vicinity of the disk 3, and the heat entering the infrared detection element 1 via the disk 3 is reduced. Therefore, the refrigerator 7 has a low temperature, for example, 77.
Since the load when cooling the infrared detection element 1 to K is small, the power consumption of the refrigerator 7 can be reduced.
【００２４】実施例２．図１で説明した実施例１のスペ
ーサ１３は、スペーサ１３自体の熱伝導により赤外線検
知素子１に侵入する熱を極力少なくする必要がある。そ
こで、実施例２ではスペーサ１３を低熱伝導な弾性材料
例えば樹脂スポンジで形成することにより、弾力性を利
用して容易にコールドフィンガ１１と内筒４の両者に密
着した状態で装着することができ、かつスペーサ１３自
体の熱伝導により、赤外線検知素子１に侵入する熱を少
なく押さえながら実施例１と同様の効果を期待できる。Embodiment 2 FIG. In the spacer 13 of the first embodiment described with reference to FIG. 1, it is necessary to minimize the heat that enters the infrared detection element 1 due to the heat conduction of the spacer 13 itself. Therefore, in the second embodiment, the spacer 13 is made of an elastic material having a low thermal conductivity, for example, a resin sponge, so that the spacer 13 can be easily attached to both the cold finger 11 and the inner cylinder 4 in close contact with each other by utilizing elasticity. Moreover, the same effect as that of the first embodiment can be expected while suppressing the heat entering the infrared detection element 1 by the heat conduction of the spacer 13 itself.
【００２５】実施例３．図１で説明した実施例１のスペ
ーサ１３は、対流防止スペーサ１３自体の熱伝導により
赤外線検知素子１に侵入する熱を極力少なくする必要が
ある。そこで、実施例３では、発泡フォーミング剤をコ
ールドフィンガ１１と内筒４の間の空気層に充填して成
型することにより、コールドフィンガ１１と内筒４両者
に完全に密着した状態にすることができるため、容易に
空気層をなくして対流を防止でき、かつ発泡フォーミン
グ剤で形成された部材は熱伝導性が悪いので、スペーサ
１３自体の熱伝導により、赤外線検知素子１に侵入する
熱を少なく押さえながら実施例１と同様の効果を期待で
きる。Example 3. In the spacer 13 of the first embodiment described with reference to FIG. 1, it is necessary to minimize the heat that enters the infrared detection element 1 due to the heat conduction of the convection prevention spacer 13 itself. Therefore, in the third embodiment, the foaming agent is filled in the air layer between the cold finger 11 and the inner cylinder 4 to be molded, so that the cold finger 11 and the inner cylinder 4 can be brought into a completely adhered state. Therefore, the air layer can be easily removed to prevent convection, and the member formed of the foaming foaming agent has poor thermal conductivity. Therefore, heat entering the infrared detecting element 1 can be reduced by the heat conduction of the spacer 13 itself. While holding down, the same effect as that of the first embodiment can be expected.
【００２６】実施例４．図２は実施例４を示す図で、実
施例４は実施例１のスペーサ１３をコールドフィンガ１
１に低熱伝導薄肉シート例えば薄肉マイラシートを巻き
付けて形成しているため、容易に空気層をなくして対流
を防止でき、また、フランジ１２付近の熱が円板３付近
に伝わりにくいので、スペーサ１３自体の熱伝導によ
り、赤外線検知素子１に侵入する熱を少なく押さえなが
ら実施例１と同様の効果を期待できる。Example 4. FIG. 2 is a diagram showing a fourth embodiment. In the fourth embodiment, the spacer 13 of the first embodiment is replaced with the cold finger 1.
1 is formed by winding a low-heat-conducting thin sheet, for example, a thin Mylar sheet, so that an air layer can be easily eliminated to prevent convection, and the heat in the vicinity of the flange 12 is hard to be transmitted to the vicinity of the disk 3, so that the spacer 13 Due to the heat conduction of itself, the same effect as that of the first embodiment can be expected while suppressing the heat entering the infrared detection element 1 to be small.
【００２７】実施例５．図３は実施例５を示す構成図で
ある。図１において赤外線検知素子１、デュワ２、冷凍
機７は従来の装置とまったく同様であるため説明は省略
する。１４は冷凍機７のコールドフィンガ１１と内筒４
の間の空気層を輪切り状に仕切るように設けた間仕切り
である。Example 5. FIG. 3 is a configuration diagram showing a fifth embodiment. In FIG. 1, the infrared detecting element 1, the dewar 2, and the refrigerator 7 are the same as those of the conventional device, and therefore the description thereof will be omitted. Reference numeral 14 denotes a cold finger 11 of the refrigerator 7 and an inner cylinder 4
It is a partition provided so as to partition the air layer between them into a circular slice.
【００２８】次に動作について説明する。冷凍機７のコ
ールドフィンガ１１先端部に冷熱を発生させて、前記コ
ールドフィンガ１１の先端部に接触している円板３を介
して赤外線検知素子１を冷却している状態において、コ
ールドフィンガ１１と内筒４の間の空気層を輪切り状に
間仕切１４で仕切っているため、コールドフィンガ１１
と内筒４の間の空気層で円板３付近とフランジ１２付近
の空気の温度差により発生する空気対流が抑制される。
そのため、フランジ１２付近の温かい空気が円板３付近
に運ばれることがなくなり、円板３を介して赤外線検知
素子１へ侵入する熱が減少する。よって、冷凍機７が低
温例えば７７Ｋまで赤外線検知素子１を冷却する際の負
荷が小さいため、冷凍機７の消費電力を低減することが
できる。Next, the operation will be described. When cold heat is generated at the tip of the cold finger 11 of the refrigerator 7 and the infrared detection element 1 is cooled via the disk 3 that is in contact with the tip of the cold finger 11, Since the air layer between the inner cylinders 4 is partitioned by the partition 14 in a circular slice shape, the cold finger 11
In the air layer between the inner cylinder 4 and the inner cylinder 4, air convection caused by the temperature difference between the air near the disk 3 and the air near the flange 12 is suppressed.
Therefore, warm air in the vicinity of the flange 12 is not carried to the vicinity of the disk 3, and the heat entering the infrared detection element 1 via the disk 3 is reduced. Therefore, since the load when the refrigerator 7 cools the infrared detection element 1 to a low temperature, for example, 77K, is small, the power consumption of the refrigerator 7 can be reduced.
【００２９】実施例６．上記実施例５では、間仕切り１
４自体の熱伝導により内筒４からコールドフィンガ１１
を経由して赤外線検知素子１侵入する熱を極力少なくす
る必要がある。そこで、低熱伝導薄肉シート例えば薄肉
マイラシートで間仕切り１４を成形することにより、間
仕切り１４自体の熱伝導で赤外線検知素子１に侵入する
熱を少なく押さえながら実施例５と同様の効果を期待で
きる。Example 6. In the above-mentioned Example 5, the partition 1
Due to the heat conduction of the 4 itself, the cold finger 11 from the inner cylinder 4
It is necessary to minimize the heat that enters the infrared detecting element 1 via the. Therefore, by forming the partition 14 with a low-heat-conducting thin sheet, for example, a thin mylar sheet, the same effect as that of the fifth embodiment can be expected while suppressing the heat entering the infrared detection element 1 by the heat conduction of the partition 14 itself.
【００３０】実施例７．上記実施例６において低熱伝導
薄肉シート製の間仕切りは柔らかいために、変形して対
流を防ぎきれない場合がある。そこで、図４の実施例７
では間仕切り１４の内周と外周をはさみこむように押さ
えるようなストッパ１５を設けて間仕切りの変形を防止
することにより、対流防止効果を確実に得ることができ
る。Example 7. In the above-mentioned Example 6, since the partition wall made of a low heat conductive thin sheet is soft, it may be deformed to prevent convection. Therefore, the seventh embodiment of FIG.
Then, by providing the stopper 15 that presses the inner circumference and the outer circumference of the partition 14 so as to sandwich the partition 14 to prevent the partition from being deformed, the convection prevention effect can be reliably obtained.
【００３１】実施例８．図４の実施例８では、上記実施
例７のストッパ１５を低熱伝導な弾性材料例えば樹脂ス
ポンジで成型しているため、弾力性を利用して間仕切り
１４とともに容易にコールドフィンガ１１と内筒４の間
に装着することが可能で、ストッパ１５が内筒４および
コールドフィンガ１１と密着して熱伝導が大きくなるた
めに増加する赤外線検知素子１への熱侵入を小さく抑え
ながら、実施例７と同様の効果が期待できる。Example 8. In Embodiment 8 of FIG. 4, since the stopper 15 of Embodiment 7 is formed of an elastic material having low heat conductivity such as a resin sponge, elasticity of the cold finger 11 and the inner cylinder 4 can be easily formed together with the partition 14. It can be mounted in the same manner as in the case of the seventh embodiment while suppressing the heat intrusion to the infrared detection element 1 which is increased because the stopper 15 is in close contact with the inner cylinder 4 and the cold finger 11 to increase heat conduction. The effect of can be expected.
【００３２】[0032]
【発明の効果】この発明は、以上説明したように構成さ
れているので、以下に記載されるような効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００３３】この発明の実施例１によれば、内筒とコー
ルドフィンガ接合部の空気層にスペーサを挿入する構成
によって、内筒とコールドフィンガの間の空気層で、円
板付近とフランジ付近の空気の温度差により発生する空
気対流を抑制することができるため、フランジ付近の温
かい空気が円板付近に運ばれることがなくなり、円板を
介して赤外線検知素子へ侵入する熱が減少する。よっ
て、冷凍機が低温例えば７７Ｋに赤外線検知素子を冷却
する際の負荷が小さいため、冷凍機の消費電力を低減す
ることができる。According to the first embodiment of the present invention, the spacer is inserted into the air layer between the inner cylinder and the cold finger, so that the air layer between the inner cylinder and the cold finger is located near the disk and near the flange. Since the air convection caused by the temperature difference of the air can be suppressed, the warm air near the flange is not carried to the vicinity of the disc, and the heat entering the infrared detecting element via the disc is reduced. Therefore, since the load when the refrigerator cools the infrared detection element to a low temperature, for example, 77K is small, the power consumption of the refrigerator can be reduced.
【００３４】また、この発明の実施例２によれば、実施
例１のスペーサを低熱伝導な弾性材料例えば樹脂スポン
ジで成型する構成によって、弾力性を利用して容易にコ
ールドフィンガと内筒両者に密着するようにスペーサを
装着でき、スペーサ自体の熱伝導による赤外線検知素子
への熱侵入を小さく抑えながら円板付近とフランジ付近
の空気の温度差により発生する空気対流を抑制して、冷
凍機の消費電力を低減することができる。Further, according to the second embodiment of the present invention, the spacer of the first embodiment is molded with an elastic material having a low thermal conductivity, such as a resin sponge, so that it is possible to easily use both the cold finger and the inner cylinder by utilizing elasticity. Spacers can be attached in close contact with each other, and while suppressing heat intrusion to the infrared detection element due to heat conduction of the spacer itself, air convection caused by the temperature difference between the air near the disc and the flange is suppressed, Power consumption can be reduced.
【００３５】また、この発明の実施例３によれば、実施
例１のスペーサを低熱伝導な発泡フォーミング剤の充填
で成形する構成によって、コールドフィンガと内筒両者
に完全に密着するようにスペーサを装着でき、発泡フォ
ーミング剤は低熱伝導なためスペーサ自体の熱伝導によ
る赤外線検知素子への熱侵入を小さく抑えながら円板付
近とフランジ付近の空気の温度差により発生する空気対
流を抑制して、冷凍機の消費電力を低減することができ
る。Further, according to the third embodiment of the present invention, the spacer of the first embodiment is molded by filling the foam forming agent having a low thermal conductivity, so that the spacer is completely adhered to both the cold finger and the inner cylinder. Since it can be mounted and the foaming agent has low thermal conductivity, it suppresses air convection caused by the temperature difference between the air near the disk and the flange while suppressing heat intrusion to the infrared detection element due to the heat conduction of the spacer itself, and refrigeration. The power consumption of the machine can be reduced.
【００３６】また、この発明の実施例４によれば、実施
例１のスペーサを薄肉低熱伝導シート例えば薄肉マイラ
シートをコールドフィンガに巻き付けるようにして成形
する構成によって、容易に対流防止スペーサを設けるこ
とができ、スペーサ自体の熱伝導による赤外線検知素子
への熱侵入を小さく抑えながら円板付近とフランジ付近
の空気の温度差により発生する空気対流を抑制すること
により、冷凍機の消費電力を低減することができる。Further, according to the fourth embodiment of the present invention, the convection preventing spacer can be easily provided by forming the spacer of the first embodiment by winding a thin low thermal conductive sheet, for example, a thin Mylar sheet around a cold finger. It is possible to reduce the power consumption of the refrigerator by suppressing the air convection that occurs due to the temperature difference between the air near the disk and the air near the flange while suppressing the heat intrusion to the infrared detection element due to the heat conduction of the spacer itself. be able to.
【００３７】また、この発明の実施例５によれば、コー
ルドフィンガとデュワ内筒の間の輪切り状に仕切るよう
に間仕切を設ける構成によっても、内筒とコールドフィ
ンガの間の空気で、円板付近とフランジ付近の空気の温
度差により発生する空気対流を抑制して、冷凍機の消費
電力を低減することができる。Further, according to the fifth embodiment of the present invention, even if the partition is provided so as to partition the cold finger and the Dewar inner cylinder into a circular slice shape, the disc between the inner cylinder and the cold finger is formed by the air. It is possible to suppress air convection caused by the temperature difference between the air in the vicinity and the temperature in the vicinity of the flange, and reduce the power consumption of the refrigerator.
【００３８】また、この発明の実施例６によれば、実施
例５の間仕切りを薄肉低熱伝導シート例えば薄肉マイラ
シートで成形する構成によって、間仕切り自体の熱伝導
により、赤外線検知素子に侵入する熱を少なく押さえな
がら円板付近とフランジ付近の空気の温度差により発生
する空気対流を抑制して、冷凍機の消費電力を低減する
ことができる。Further, according to the sixth embodiment of the present invention, the partition wall of the partition wall of the fifth embodiment is formed of a thin low thermal conductive sheet such as a thin Mylar sheet, so that heat entering the infrared detecting element can be prevented by heat conduction of the partition itself. It is possible to suppress the air convection that occurs due to the temperature difference between the air near the disk and the air near the flange while keeping it low, and reduce the power consumption of the refrigerator.
【００３９】またこの発明の実施例７によれば、実施例
６の薄肉低熱伝導シート製間仕切りの内周および外周を
はさみこむように押さえるストッパを設ける構成によ
り、薄肉低熱伝導シート製間仕切りの変形を防止して、
対流防止効果を確実に得ることができる。According to the seventh embodiment of the present invention, the thin low thermal conductive sheet partition of the sixth embodiment is provided with a stopper that holds the inner and outer circumferences of the partition so as to prevent deformation of the thin low thermal conductive sheet partition. do it,
The effect of preventing convection can be surely obtained.
【００４０】また、この発明の実施例８によれば、実施
例７のストッパを低熱伝導な弾性材料例えば樹脂スポン
ジで成型する構成によって、弾力性を利用して薄肉低熱
伝導シート製間仕切りとともに容易にコールドフィンガ
と内筒４の間に装着することが可能で、ストッパの熱伝
導による赤外線検知素子への熱侵入を小さく抑えながら
対流防止効果を確実に得ることができる。Further, according to the eighth embodiment of the present invention, the stopper of the seventh embodiment is molded with an elastic material having a low thermal conductivity, for example, a resin sponge. Since it can be mounted between the cold finger and the inner cylinder 4, it is possible to reliably obtain the convection prevention effect while suppressing the heat intrusion to the infrared detection element due to the heat conduction of the stopper.
【図１】 この発明の実施例１、実施例２、実施例３を
示す赤外線検知装置の構成図である。FIG. 1 is a configuration diagram of an infrared detection device showing a first embodiment, a second embodiment, and a third embodiment of the present invention.
【図２】 この発明の実施例４を示す赤外線検知装置の
構成図である。FIG. 2 is a configuration diagram of an infrared detection device showing a fourth embodiment of the present invention.
【図３】 この発明の実施例５を示す赤外線検知装置の
構成図である。FIG. 3 is a configuration diagram of an infrared detection device showing a fifth embodiment of the present invention.
【図４】 この発明の実施例７、実施例８を示す赤外線
検知装置の構成図である。FIG. 4 is a configuration diagram of an infrared detection device showing Embodiments 7 and 8 of the present invention.
【図５】 従来の装置を示す構成図である。FIG. 5 is a configuration diagram showing a conventional device.
１ 赤外線検知素子、２ デュワ、３ 円板、４ デュ
ワ内筒、５ 外殻、６ウインドウ、７ 冷凍機、１１
コールドフィンガ、１２ フランジ、１３スペーサ、１
４ 間仕切り、１５ ストッパ。1 Infrared Detector 2, 2 Dewar, 3 Disc, 4 Dewar Inner Tube, 5 Outer Shell, 6 Window, 7 Refrigerator, 11
Cold fingers, 12 flanges, 13 spacers, 1
4 partitions, 15 stoppers.
Claims (8)
前記内筒を覆う外殻と、赤外線を透過させるために前記
外殻の前記円板と対向する一端に設けられ、前記外殻の
一部をなすウインドーによって構成されたデュワと、前
記円板の前記ウインドーと対向する面に取付けられ、低
温に冷却して使用する赤外線検知素子と、その先端部で
冷熱を発生する円柱状のコールドフィンガを有する冷凍
機とを備え、前記内筒に前記コールドフィンガの先端を
挿入して、前記円板を介して前記赤外線検知素子を冷却
するような構成した赤外線検知装置において、前記コー
ルドフィンガと前記内筒の間に、スペーサを備えたこと
を特徴とする赤外線検知装置。1. A tubular inner cylinder having one end sealed with a disc,
An outer shell that covers the inner cylinder, a dewar that is provided at one end of the outer shell that faces the disc to transmit infrared rays, and a dewar that is formed by a window that forms a part of the outer shell, and the disc. An infrared detection element, which is attached to the surface facing the window and is used by cooling to a low temperature, and a refrigerator having a cylindrical cold finger that generates cold heat at its tip end are provided, and the cold finger is provided in the inner cylinder. In the infrared detecting device configured to cool the infrared detecting element through the circular plate by inserting the tip of the infrared ray, a spacer is provided between the cold finger and the inner cylinder. Detection device.
形成したことを特徴とする請求項１記載の赤外線検知装
置。2. The infrared detector according to claim 1, wherein the spacer is formed of an elastic body having a low thermal conductivity.
り形成したことを特徴とする請求項１記載の赤外線検知
装置。3. The infrared detection device according to claim 1, wherein the spacer is formed of a foaming forming agent.
伝導薄肉シートを巻き付けて形成したことを特徴とする
請求項１記載の赤外線検知装置。4. The infrared detection device according to claim 1, wherein the spacer is formed by winding a low heat conductive thin sheet around a cold finger.
前記内筒を覆う外殻と、赤外線を透過させるために前記
外殻の前記円板と対向する一端に設けられ、前記外殻の
一部をなすウインドーで構成されたデュワと、前記円板
の前記ウインドーと対向する面に取付けられ、低温に冷
却して使用する赤外線検知素子と、その先端部で冷熱を
発生する円柱状のコールドフィンガを有する冷凍機とで
構成され、前記内筒に前記コールドフィンガの先端を挿
入して、前記円板を介して前記赤外線検知素子を冷却す
るような構成の赤外線検知装置において、前記コールド
フィンガと前記内筒の間を輪切り状に仕切る間仕切りを
備えたことを特徴とする赤外線検知装置。5. A tubular inner cylinder having one end sealed with a disc,
An outer shell that covers the inner cylinder, a dewar that is provided at one end of the outer shell that faces the disk to transmit infrared rays, and a dewar that is formed of a window that forms a part of the outer shell, and It is composed of an infrared detection element mounted on the surface facing the window and used by cooling to a low temperature, and a refrigerator having a cylindrical cold finger that generates cold heat at its tip, and the cold is provided in the inner cylinder. In the infrared detection device having a structure in which the tips of the fingers are inserted and the infrared detection element is cooled through the disc, a partition for partitioning the cold finger and the inner cylinder into a ring shape is provided. Infrared detector featuring.
成したことを特徴とする請求項５記載の赤外線検知装
置。6. The infrared detection device according to claim 5, wherein the partition is formed of a thin sheet of low thermal conductivity.
よび内周をはさみこむように固定するストッパを備えた
ことを特徴とする請求項６記載の赤外線検知装置。7. The infrared detection device according to claim 6, further comprising a stopper for fixing the partition wall made of a low heat conductive thin sheet so as to sandwich the outer circumference and the inner circumference.
成したことを特徴とする請求項７記載の赤外線検知装
置。8. The infrared detection device according to claim 7, wherein the stopper is formed of an elastic body having a low thermal conductivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7067952A JPH08261821A (en) | 1995-03-27 | 1995-03-27 | Infrared detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7067952A JPH08261821A (en) | 1995-03-27 | 1995-03-27 | Infrared detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08261821A true JPH08261821A (en) | 1996-10-11 |
Family
ID=13359805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7067952A Pending JPH08261821A (en) | 1995-03-27 | 1995-03-27 | Infrared detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08261821A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7415830B2 (en) | 2005-08-31 | 2008-08-26 | Raytheon Company | Method and system for cryogenic cooling |
| CN102184610A (en) * | 2011-04-29 | 2011-09-14 | 深圳市豪恩安全科技有限公司 | Passive infrared detector, security system and mounting method for passive infrared detector |
| GB2484376A (en) * | 2010-10-05 | 2012-04-11 | Gen Electric | System and method for self-sealing a coldhead sleeve of a magnetic resonance imaging system |
| CN103456757A (en) * | 2013-07-22 | 2013-12-18 | 中国科学院光电技术研究所 | All-metal sealed EMCCD camera refrigeration dewar |
| CN105466569A (en) * | 2016-01-06 | 2016-04-06 | 潘祖国 | Refrigerator temperature detection system based on swinging-type infrared temperature measurement device |
| CN105527022A (en) * | 2016-01-06 | 2016-04-27 | 陈昊哲 | Swing-type infrared temperature measurement device |
| CN106092329A (en) * | 2016-04-15 | 2016-11-09 | 中国科学院上海技术物理研究所 | A kind of integrated miniature Dewar inner tube and implementation method |
-
1995
- 1995-03-27 JP JP7067952A patent/JPH08261821A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7415830B2 (en) | 2005-08-31 | 2008-08-26 | Raytheon Company | Method and system for cryogenic cooling |
| WO2007027822A3 (en) * | 2005-08-31 | 2009-10-08 | Raytheon Company | Method and system for cryogenic cooling |
| GB2484376A (en) * | 2010-10-05 | 2012-04-11 | Gen Electric | System and method for self-sealing a coldhead sleeve of a magnetic resonance imaging system |
| US8570043B2 (en) | 2010-10-05 | 2013-10-29 | General Electric Company | System and method for self-sealing a coldhead sleeve of a magnetic resonance imaging system |
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