JPS5892979A - Radiation detector - Google Patents
Radiation detectorInfo
- Publication number
- JPS5892979A JPS5892979A JP19216081A JP19216081A JPS5892979A JP S5892979 A JPS5892979 A JP S5892979A JP 19216081 A JP19216081 A JP 19216081A JP 19216081 A JP19216081 A JP 19216081A JP S5892979 A JPS5892979 A JP S5892979A
- Authority
- JP
- Japan
- Prior art keywords
- light
- scintilator
- radiation
- waveguide path
- scintillator
- 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
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/2002—Optical details, e.g. reflecting or diffusing layers
Abstract
Description
【発明の詳細な説明】
発明の技術分野
不発盟はX線撮影装置等に適用して有用な放射線検出器
に関する。DETAILED DESCRIPTION OF THE INVENTION The technical field of the invention relates to a radiation detector useful when applied to an X-ray imaging device or the like.
発明の技術的背景とその問題点
従来、放射線との相互作用で螢光あるいは燐光を発する
Vンテレータを光導波路構造の一部として利用する放射
線検出器が種々提案されているが、これらは一般に$1
図に示す如く構成されている。すなわち、Vンテレータ
lをVフチレータ1よりも屈折率の小さい物質2で被覆
して構成されている。そして屈折率分布による光のとじ
こめ作用を利用し、入射放射#sRによって生じた光を
伝送し光検出器1によって検出するものとなっている。Technical background of the invention and its problems Various radiation detectors have been proposed in the past that utilize Vinterators, which emit fluorescence or phosphorescence upon interaction with radiation, as part of the optical waveguide structure. 1
It is configured as shown in the figure. In other words, the V interator 1 is covered with a substance 2 having a smaller refractive index than the V interator 1. Using the light confinement effect due to the refractive index distribution, the light generated by the incident radiation #sR is transmitted and detected by the photodetector 1.
しかしながら、このような従来の放射線検出器では、屈
折率分布によるとじこめ作用が完全なものではな(、被
覆層からの光の款射損失はさけられない問題である。ま
た、被覆層は放射線が照射されても発光することはない
部分である為に、空間利用度を悪(シ、検出器の効率を
低下させ、空間分解能を下げる等の欠点をもっている。However, in such conventional radiation detectors, the confinement effect due to the refractive index distribution is not perfect (the loss of light transmission from the coating layer is an unavoidable problem). Since it is a part that does not emit light even when irradiated, it has drawbacks such as poor space utilization, lower detector efficiency, and lower spatial resolution.
この為、これらの問題点を改善した新しい放射線検出器
の開発が望まれている。Therefore, it is desired to develop a new radiation detector that improves these problems.
発明の目的
本発明の目的は、上記のような従来技術の欠点を改善し
、効率のより高い放射線検出器を提供することにある。OBJECTS OF THE INVENTION An object of the present invention is to improve the drawbacks of the prior art as described above and to provide a radiation detector with higher efficiency.
発明の概要
本発明は、放射線と相互作用して螢光若しくは燐光を発
するシンチレータと、このシンチレータが発する光を透
過させずに吸収若しくは反射する物質からなり、上記シ
ンチレータを被覆し該シンチレータと共に導波路を形成
する被覆層と、入射放射線と1紀シンチレータとの相互
作用により生じた光を検出する光検出器とを具備したも
のである。・すなわち、ファイバー状の形状のシンチレ
ータの外側にシンチレータの内部からの光を透過せずに
吸収若しくは反射する内部光反射用の物質を禎覆し、シ
ンチレータが発光部として働(たけでなく先導波路とし
ても作用するような構造にすることにより1発光効率を
高め放射線との相互作用から生じた光をより効率よ(光
検出器に伝送させるようにしだものである。Summary of the Invention The present invention comprises a scintillator that interacts with radiation to emit fluorescence or phosphorescence, and a substance that absorbs or reflects the light emitted by the scintillator without transmitting it, and coats the scintillator and forms a waveguide together with the scintillator. and a photodetector that detects light generated by the interaction between the incident radiation and the primary scintillator.・In other words, a material for internal light reflection that absorbs or reflects light from inside the scintillator without transmitting it is removed from the outside of the fiber-shaped scintillator, so that the scintillator functions not only as a light emitting part (but also as a guiding waveguide). By creating a structure that also acts on the radiation, the luminous efficiency is increased and the light generated from the interaction with the radiation is transmitted to the photodetector more efficiently.
〕
発明の効果
本発明によれば、被覆層からの光の放射損失を少な(す
ることができると共に、入射X線に対するシンチレータ
の有効#面積を大きくとれるので、X線の利用効率を高
め得ると共に、被曝X線の低減化をもはかり得る。また
、構造tその製造工程を簡略化し得る等の効果を奏する
。[Effects of the Invention] According to the present invention, it is possible to reduce the radiation loss of light from the coating layer, and to increase the effective area of the scintillator for incident X-rays, thereby increasing the utilization efficiency of X-rays. , it is possible to reduce exposure to X-rays, and the manufacturing process of the structure can be simplified.
発明の実施例 以下、本発明の詳細を図示の実施例によって説明する。Examples of the invention Hereinafter, details of the present invention will be explained with reference to illustrated embodiments.
第2図は本発明に係わる放射線検出器を示す概略構成図
で、第3図は上記検出器を2次元X線撮影装置に適用し
た実施例を示す概略構成図である。第2図に示すよう(
;、ファイバー状に整形したグラスチックレンチレータ
4の同面により内部光反射用薄膜(被覆層)5を蒸着形
成して、プラスチックシンチレータ4が光導波路となる
ような構造となっている。このような構造をもつV’/
fレータファイバーが第3図に示すように2次元に配列
され筺体6::収納される。なお、1.、、シンチレー
タ4を伝送した光は光検出器1(二て検出され、その検
出信号は図示しないr−夕処理部に供給されるものとな
っている。FIG. 2 is a schematic configuration diagram showing a radiation detector according to the present invention, and FIG. 3 is a schematic configuration diagram showing an embodiment in which the above-mentioned detector is applied to a two-dimensional X-ray imaging apparatus. As shown in Figure 2 (
A thin film (coating layer) 5 for internal light reflection is formed by vapor deposition on the same surface of the plastic scintillator 4 shaped into a fiber, so that the plastic scintillator 4 becomes an optical waveguide. V'/ with such a structure
The f-ray fibers are arranged two-dimensionally and housed in the housing 6 as shown in FIG. In addition, 1. ,, The light transmitted through the scintillator 4 is detected by a photodetector 1 (2), and the detection signal is supplied to an r-wave processing section (not shown).
このような構造であれば、内部光反射用薄膜iの内部光
反射により光のクロスシークがなくなり、しかもシンチ
レータ4自身な光導波路とすることにより、入射X線(
第2図中Xで示す)に対するシンチレータの有効断面積
が大きくとれるようになる。このためX線の利用効率を
大幅に高めることができる。さらに、従来あったシンチ
レータと先導波路との結合部における光の損失をなくす
ことができた。これにより被曝X線の低減化をはかるこ
とができ、空間分解能を高めることもできた。また、第
2図に示した構造から製作工程を簡単にすることができ
た。With such a structure, cross-seek of light is eliminated due to internal light reflection of the internal light reflection thin film i, and by using the scintillator 4 itself as an optical waveguide, incident X-rays (
The effective cross-sectional area of the scintillator relative to the area (indicated by X in FIG. 2) can be increased. Therefore, the utilization efficiency of X-rays can be greatly increased. Furthermore, it was possible to eliminate light loss at the coupling portion between the scintillator and the leading waveguide, which existed in the past. This made it possible to reduce exposure to X-rays and improve spatial resolution. Furthermore, the manufacturing process could be simplified using the structure shown in FIG.
なお1本発明は上述した実施例に限定されるものではな
い0例えば、第4図に示す如くレンチレータ・ファイバ
ー4に光ファイ/考−1を組み合わせるようにしてもよ
い。また、第5図に示す如くシンチレータ・ファイバー
4の先端(:外部光1蔽用兼内部光反射用膜1を付加す
るようにしてもよい。さらに、@6図に示す如(内部光
反射用膜5の外側にX線の散乱防止用膜−を付加するこ
とにより、X線の散乱によるクロストークをなくすこと
も可能である。また、内部光反射用膜(被覆層)は内部
光を透過させず吸収若しくは反射してしまう物質であれ
ば任意の物質を用いることができる。さらに、内部光反
射用膜のシンチレータへの被覆には%蒸着、スノ臂ツタ
、その他各種の方法を適用することができる。要するに
本発明は、その1!旨を逸脱しない範囲で1種々変形し
て実施することができる。Note that the present invention is not limited to the above-described embodiments. For example, as shown in FIG. 4, an optical fiber 4 may be combined with an optical fiber 4. Furthermore, as shown in Fig. 5, a film 1 for shielding external light and reflecting internal light may be added to the tip of the scintillator fiber 4 (for shielding external light and for reflecting internal light 1). It is also possible to eliminate crosstalk due to X-ray scattering by adding an X-ray scattering prevention film to the outside of the film 5.In addition, the internal light reflection film (coating layer) allows internal light to pass through. Any substance can be used as long as it absorbs or reflects the internal light without absorbing or reflecting it.Furthermore, % evaporation, snow ivy, and various other methods can be used to coat the scintillator with the internal light reflection film. In short, the present invention can be implemented with various modifications without departing from the scope of the invention.
第1図は従来の放射線検出器を示す概略構成図、第2図
は本発明に係わる放射線検出器を示す概略構成図、第3
図は第2図に示した放射線検出器を2次元X線撮影装置
七−歳用した実施例を示す概略構成図、第4図乃至第6
図はそれぞれ本発明の変形例を示す概略構成図である。
1・・・シンチレータ、2・・・被覆物質、J・・・光
検出器、4・・・グラスチックレンチレータ、5・・・
内部光反射用薄膜(被覆層)、σ・・・筐体、r・・・
光ファイバー、8・・・外部光遮蔽量兼内部光反射用膜
、#・−X線散乱防止用属。
出願人代理人 弁理士 鈴 江 武 彦矛盈図
矛2図
矛3図
$4 図
矛5図
矛6[!!1FIG. 1 is a schematic configuration diagram showing a conventional radiation detector, FIG. 2 is a schematic configuration diagram showing a radiation detector according to the present invention, and FIG.
The figure is a schematic configuration diagram showing an embodiment in which the radiation detector shown in Fig. 2 is used in a two-dimensional X-ray imaging device, and Figs.
Each figure is a schematic configuration diagram showing a modification of the present invention. DESCRIPTION OF SYMBOLS 1...Scintillator, 2...Coating substance, J...Photodetector, 4...Glasstic lentilator, 5...
Thin film for internal light reflection (coating layer), σ... Housing, r...
Optical fiber, 8... Film for shielding external light and reflecting internal light, #--Metal for preventing X-ray scattering. Applicant's agent Patent attorney Takehiko Suzue 2 Zuyoko 2 Zuyoko 3 $4 Zuyoko 5 Zuyoko 6 [! ! 1
Claims (1)
レータと、このVンチレータが発する光を透過させずに
吸収若しくは反射する物質からなり、上記シンテレ−“
夕を被覆し該vyfレータと共に導波路を形成する被覆
層と、入射放射線と嗣紀Vンデレータとの相互作用こよ
り生じた光″を検出する光検出器とを具備してなること
を特徴とする放射線検出器。It consists of a V-antillator that interacts with radiation to emit fluorescence or phosphorescence, and a substance that absorbs or reflects the light emitted by the V-antillator without transmitting it.
A radiation source characterized by comprising: a coating layer that covers the rays and forms a waveguide together with the vyf element; and a photodetector that detects the light produced by the interaction between the incident radiation and the vyf element. Detector.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19216081A JPS5892979A (en) | 1981-11-30 | 1981-11-30 | Radiation detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19216081A JPS5892979A (en) | 1981-11-30 | 1981-11-30 | Radiation detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5892979A true JPS5892979A (en) | 1983-06-02 |
Family
ID=16286684
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19216081A Pending JPS5892979A (en) | 1981-11-30 | 1981-11-30 | Radiation detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5892979A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0589691A2 (en) * | 1992-09-23 | 1994-03-30 | Wallac Oy | Preventing optical crosstalk between liquid scintillation samples in translucent sample plates |
US5308986A (en) * | 1992-12-17 | 1994-05-03 | Nanoptics Incorporated | High efficiency, high resolution, real-time radiographic imaging system |
US5420959A (en) * | 1992-12-17 | 1995-05-30 | Nanoptics Incorporated | High efficiency, high resolution, real-time radiographic imaging system |
US5905263A (en) * | 1996-11-26 | 1999-05-18 | Mitsubishi Denki Kabushiki Kaisha | Depth dose measuring device |
CN109358360A (en) * | 2018-11-13 | 2019-02-19 | 中核四0四有限公司 | A kind of annular plastics scintillator and fiber-optic coupling method |
-
1981
- 1981-11-30 JP JP19216081A patent/JPS5892979A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0589691A2 (en) * | 1992-09-23 | 1994-03-30 | Wallac Oy | Preventing optical crosstalk between liquid scintillation samples in translucent sample plates |
EP0589691A3 (en) * | 1992-09-23 | 1995-12-06 | Wallac Oy | Preventing optical crosstalk between liquid scintillation samples in translucent sample plates |
US5308986A (en) * | 1992-12-17 | 1994-05-03 | Nanoptics Incorporated | High efficiency, high resolution, real-time radiographic imaging system |
US5420959A (en) * | 1992-12-17 | 1995-05-30 | Nanoptics Incorporated | High efficiency, high resolution, real-time radiographic imaging system |
US5905263A (en) * | 1996-11-26 | 1999-05-18 | Mitsubishi Denki Kabushiki Kaisha | Depth dose measuring device |
CN109358360A (en) * | 2018-11-13 | 2019-02-19 | 中核四0四有限公司 | A kind of annular plastics scintillator and fiber-optic coupling method |
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