JPS6132016A - Fiberscope for very low temperature - Google Patents
Fiberscope for very low temperatureInfo
- Publication number
- JPS6132016A JPS6132016A JP15200484A JP15200484A JPS6132016A JP S6132016 A JPS6132016 A JP S6132016A JP 15200484 A JP15200484 A JP 15200484A JP 15200484 A JP15200484 A JP 15200484A JP S6132016 A JPS6132016 A JP S6132016A
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- fiberscope
- low temperature
- casing material
- cryogenic
- 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
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Telescopes (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Lens Barrels (AREA)
Abstract
Description
【発明の詳細な説明】 〔発明の属する技術分野〕 この発明は極低温用ファイバースコープに関する。[Detailed description of the invention] [Technical field to which the invention pertains] This invention relates to a cryogenic fiberscope.
Ｌ、Ｎ（） 、 ＬＰ（） 、 ＬＮ２． ＬＨｅ
などの各種低温液体施設や研究装置などでは極低温にて
使用される材料の極低温でのふるまい、たとえば、材料
のき裂の状態ヲ知ることが極低温材料の機械的信頼性の
而から必要となってきた。そこで極低温中にらる各種材
料の極低温での状態を光フアイバースコープなど使って
、極低温中で目視観察する要求が高まってきた。従来こ
のような目的には常温で使われる光フアイバースコープ
（第３図）を用いてきたが、第４図に示すような問題が
しばしば起った。L, N(), LP(), LN2. LHe
For the mechanical reliability of cryogenic materials, it is necessary to know the behavior of materials used at cryogenic temperatures, such as the state of cracks in the materials, in various cryogenic liquid facilities and research equipment such as It has become. Therefore, there has been a growing demand for visual observation of the state of various materials in cryogenic temperatures using optical fiberscopes and other tools. Conventionally, optical fiberscopes (FIG. 3), which are used at room temperature, have been used for this purpose, but problems such as those shown in FIG. 4 often occur.
第３図では極低温で使われたファイバースコープの対物
レンズの模式図、第４図はそれを常温に戻した状態での
ファイバースコープの対物レンズの従来技術の模式図を
示す。Fig. 3 shows a schematic diagram of the objective lens of a fiberscope used at extremely low temperatures, and Fig. 4 shows a schematic diagram of the conventional technology of the objective lens of a fiberscope after returning it to room temperature.
次に図面に従って説明する。第３図に示すファイバース
コープの対物レンズ（４）側が液体窒素（３）又は液体
ヘリウム（３）に浸漬されてイメージファイバー（１）
を通して目視（２）で被写体（５）を観察して、しばら
くの後に、ケーシング（７）で接着（６）された対物レ
ンズ（４）がはがれて、第４図に示すように、対物レン
ズ（４）が所定の焦点距離に存在せずに、被写体（５）
を観察するのが不可能となった。Next, explanation will be given according to the drawings. The objective lens (4) side of the fiberscope shown in Figure 3 is immersed in liquid nitrogen (3) or liquid helium (3) and the image fiber (1)
After a while, the objective lens (4) glued (6) to the casing (7) is peeled off and the objective lens (5) is observed visually (2) through the lens (2), as shown in FIG. 4) is not at the predetermined focal length and the subject (5)
became impossible to observe.
この発明の目的は上述した従来装置の欠点を改良したも
ので、極低温でファイバースコープの対物レンズの所定
の焦点距離が保持することのできる極低温用ファイバー
スコープの対物レンズ装置を提供することを目的とする
。The object of the present invention is to improve the above-mentioned drawbacks of the conventional apparatus, and to provide an objective lens apparatus for a fiberscope for cryogenic use, which can maintain a predetermined focal length of the objective lens of the fiberscope at cryogenic temperatures. purpose.
対物レンズと材料の間の構成に着目し１、対物レンズと
ケーシングの材料を結びつける構造が液体窒素と常温の
間を繰り返１−でも、はがれない構嘘で６．ｈは解決さ
れる問題でらり、そのような構造にした。Focusing on the structure between the objective lens and the material, 1. The structure that connects the objective lens and the material of the casing does not peel off even after repeated cycles between liquid nitrogen and room temperature.6. Since h is a problem to be solved, I designed it in such a structure.
即ち、凹部を有するケーシング材と凸部を有する対物レ
ンズでハメ合い（焼きバメ）構造とすることである。That is, a casing material having a concave portion and an objective lens having a convex portion are fitted into each other (shrink fit).
半永久的に極低温（ＬＮ、、 、 ＬＨｅ ）での目視
観察が可能となり、極低温中の材料の様子が手にとるよ
うにわかるなど、他への波及効果（要求）が多大なもの
がある。Visual observation at extremely low temperatures (LN, , , LHe) becomes possible semi-permanently, and the state of materials at extremely low temperatures can be seen in person, which has significant ripple effects (demands) on other areas. .
〔発明の実施例〕 第１図と第２図をもって、本発明を説明する。[Embodiments of the invention] The present invention will be explained with reference to FIGS. 1 and 2.
第１図より、凹部溝部を有するケーシング材（８）と凸
部突起状側又は凸部リング状ａ３を有する対物し／ズ（
１υを用意する。そして、凹部ＤＩを有するケーシング
材（８）を暖める。それが凸部ａ２Ｊの有する対物し／
ズαＤとのハメ合いが出来るまで、凹部ＱＯ）を有する
省−シング材（８）を暖めて膨張させる。このハメ合い
が出来たところで第２図となる。この構造により極低温
と常温の間を繰り返しても、対物レンズＱｌ）がはがれ
ることなく、目視観察が出来た。From FIG. 1, we can see that the casing material (8) has a concave groove and the objective lens (8) has a convex protrusion side or a convex ring shape a3.
Prepare 1υ. Then, the casing material (8) having the recess DI is heated. That is the objective of the convex portion a2J/
The saving material (8) having the recess QO) is heated and expanded until it fits with the size αD. When this fit is achieved, Figure 2 is shown. With this structure, visual observation was possible without the objective lens Ql) peeling off even when the temperature was repeatedly changed between extremely low temperatures and room temperature.
第１図は本発明に係る極低温で使われるファイバースコ
ープの概略図、第２図は極低温から常温へ戻し、た状態
でのファイバースコープノ概略図、第３図、第４図は従
業めファイバースコープの概略図である。
１・・・イメージファ゛イバ、２．・・目視観察側、３
・・極低温（液体窒素又は液体ヘリウム）、４・・対物
レンズ、５・・被写体、６・・接着剤、７・・ケーシン
グ材料、８・・凹型ケージング材料、１ｏ・・凹型溝、
工１・・・凸型対物レンズ、１２・・・凸型突起状又は
凸型リング状。
代理人 弁理士 則 近 憲 佑 （ほか１名）第
１ 図
第 ２ 図
第３図
第 ４ 図Fig. 1 is a schematic diagram of a fiberscope used at cryogenic temperatures according to the present invention, Fig. 2 is a schematic diagram of the fiberscope in a state that has been returned to normal temperature from cryogenic temperature, and Figs. 3 and 4 are for use by employees. FIG. 2 is a schematic diagram of a fiberscope. 1... image fiber, 2. ...Visual observation side, 3
... Cryogenic temperature (liquid nitrogen or liquid helium), 4. Objective lens, 5. Subject, 6. Adhesive, 7. Casing material, 8. Concave casing material, 1o. Concave groove,
Step 1: Convex objective lens; 12: Convex protrusion or convex ring shape. Agent Patent Attorney Kensuke Chika (and 1 other person) No.
1 Figure 2 Figure 3 Figure 4
Claims (1)
て、対物レンズは凸型突起状あるいは凸型リング状、ケ
ーシング材料には凹型溝を設けた事を特徴とする極低温
用ファイバースコープ。A fiberscope for cryogenic use, characterized in that the objective lens and casing material of the fiberscope have a convex projection or a convex ring shape, and the casing material has a concave groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15200484A JPS6132016A (en) | 1984-07-24 | 1984-07-24 | Fiberscope for very low temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15200484A JPS6132016A (en) | 1984-07-24 | 1984-07-24 | Fiberscope for very low temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6132016A true JPS6132016A (en) | 1986-02-14 |
Family
ID=15530959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15200484A Pending JPS6132016A (en) | 1984-07-24 | 1984-07-24 | Fiberscope for very low temperature |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6132016A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0316910U (en) * | 1989-06-30 | 1991-02-20 | ||
| US6039732A (en) * | 1995-04-18 | 2000-03-21 | Olympus Optical Co., Ltd. | Electric operation apparatus |
-
1984
- 1984-07-24 JP JP15200484A patent/JPS6132016A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0316910U (en) * | 1989-06-30 | 1991-02-20 | ||
| US6039732A (en) * | 1995-04-18 | 2000-03-21 | Olympus Optical Co., Ltd. | Electric operation apparatus |
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