JPH0619014A - Latent image reader - Google Patents
Latent image readerInfo
- Publication number
- JPH0619014A JPH0619014A JP4199008A JP19900892A JPH0619014A JP H0619014 A JPH0619014 A JP H0619014A JP 4199008 A JP4199008 A JP 4199008A JP 19900892 A JP19900892 A JP 19900892A JP H0619014 A JPH0619014 A JP H0619014A
- Authority
- JP
- Japan
- Prior art keywords
- fluorescence
- mirror
- stimulable phosphor
- center line
- laser light
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B42/00—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means
- G03B42/08—Visualisation of records by optical means
-
- 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
- G01T1/2012—Measuring radiation intensity with scintillation detectors using stimulable phosphors, e.g. stimulable phosphor sheets
- G01T1/2014—Reading out of stimulable sheets, e.g. latent image
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/06—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface
- H04N1/0607—Scanning a concave surface, e.g. with internal drum type scanners
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/06—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface
- H04N1/0607—Scanning a concave surface, e.g. with internal drum type scanners
- H04N1/0621—Scanning a concave surface, e.g. with internal drum type scanners using a picture-bearing surface stationary in the main-scanning direction
- H04N1/0635—Scanning a concave surface, e.g. with internal drum type scanners using a picture-bearing surface stationary in the main-scanning direction using oscillating or rotating mirrors
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、Ｘ線などの放射線の強
度分布を測定するために使用する蓄積性蛍光体から、潜
像を読み取る装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for reading a latent image from a stimulable phosphor used for measuring the intensity distribution of radiation such as X-rays.
【０００２】[0002]
【従来の技術】蓄積性蛍光体に記録された潜像を読み取
るには、レーザ光などの励起光線を蓄積性蛍光体に照射
して、そこから発生する蛍光の強度を検出する。その
際、レーザ光を蓄積性蛍光体上で走査することにより、
蓄積性蛍光体の全面から潜像を読み取ることができる。2. Description of the Related Art In order to read a latent image recorded on a stimulable phosphor, an excitation beam such as a laser beam is applied to the stimulable phosphor to detect the intensity of fluorescence emitted from it. At that time, by scanning the laser light on the stimulable phosphor,
The latent image can be read from the entire surface of the stimulable phosphor.
【０００３】レーザ光を走査する方法には各種の方法が
知られており、できるだけ短時間で効率良く潜像を読み
取れるように工夫がなされている。ところで、レーザ光
の走査運動としては、基本的には、並進往復運動と回転
運動とが考えられるが、その運動駆動系を考えると回転
運動の方が構造が簡単で、運動の安定性も優れている。
このような回転運動によってレーザ光を走査する技術
は、例えば、特開昭６４−６９１８号公報、特開昭６４
−３２７６１号公報に開示されている。Various methods are known for scanning laser light, and devised so that a latent image can be efficiently read in as short a time as possible. By the way, basically, as the scanning motion of the laser beam, translational reciprocating motion and rotary motion can be considered, but considering the motion drive system, the rotary motion has a simpler structure and excellent stability of motion. ing.
A technique for scanning a laser beam by such a rotational movement is disclosed in, for example, Japanese Patent Laid-Open Nos. Sho 64-6918 and Sho 64.
No. 32761.
【０００４】上述した二つの公開公報に開示されたレー
ザ光走査方法では、いずれも、蓄積性蛍光体を円筒面に
沿った形状としている。そして、その円筒面の中心線に
沿って進行するレーザ光を、蓄積性蛍光体に垂直になる
ように向きを変えてから、蓄積性蛍光体に照射してい
る。蓄積性蛍光体で発生した蛍光は、円筒面の中心線に
平行となるように向きを変えている。この場合、蛍光
は、レーザ光の進行方向とは逆方向に戻って来るので、
レーザ光源に衝突しないように、蛍光の向きをもう一度
直角に曲げてから（すなわち、上述の中心線に対して垂
直な方向に再び向きを変えてから）蛍光検出装置で検出
している。In both of the laser light scanning methods disclosed in the above-mentioned two publications, the stimulable phosphor is shaped along a cylindrical surface. Then, the laser light traveling along the center line of the cylindrical surface is changed in direction so as to be perpendicular to the stimulable phosphor, and then the stimulable phosphor is irradiated. The fluorescence generated by the stimulable phosphor is turned so as to be parallel to the center line of the cylindrical surface. In this case, the fluorescence returns in the direction opposite to the traveling direction of the laser light,
The fluorescence is bent again at a right angle so as not to collide with the laser light source (that is, redirected again to the direction perpendicular to the center line), and then detected by the fluorescence detection device.
【０００５】[0005]
【発明が解決しようとする課題】上述の従来技術では、
蓄積性蛍光体で発生した蛍光を、少なくとも２回直角に
曲げてから検出している。すなわち、蓄積性蛍光体で発
生した蛍光をまず蓄積性蛍光体の円筒面の中心線に沿う
方向に曲げて、レーザ光が進行してきた方向と逆方向に
蛍光を戻すようにする。さらに、レーザ光と蛍光とを分
離するために、蛍光を上記中心線に対して再び直角にな
るように曲げている。ところで、蛍光の経路をこのよう
に２回も曲げると、ミラーなどで反射するたびに蛍光強
度が減衰するという問題がある。また、２回曲げること
によって必然的に検出器までの距離が長くなって、やは
り蛍光強度が減衰したり、蛍光が発散したりするという
問題もある。In the above-mentioned prior art,
The fluorescence generated by the stimulable phosphor is bent at least twice at a right angle and then detected. That is, the fluorescence generated by the stimulable phosphor is first bent in the direction along the center line of the cylindrical surface of the stimulable phosphor so that the fluorescence is returned in the direction opposite to the direction in which the laser light has traveled. Further, in order to separate the laser light and the fluorescent light, the fluorescent light is bent again at right angles to the center line. By the way, if the fluorescence path is bent twice in this way, there is a problem that the fluorescence intensity is attenuated each time it is reflected by a mirror or the like. In addition, bending twice causes the distance to the detector to be inevitably increased, which also causes a problem that the fluorescence intensity is attenuated or fluorescence is diverged.
【０００６】本発明の目的は、蛍光の発生場所からでき
るだけ近い位置で蛍光を検出できるようにし、かつ、蓄
積性蛍光体から蛍光検出器までの経路の途中で蛍光を１
回反射させるだけで済むようにした潜像読み取り装置を
提供することにある。An object of the present invention is to allow fluorescence to be detected at a position as close as possible to the place where the fluorescence is generated, and to prevent the fluorescence from being detected in the middle of the path from the accumulative phosphor to the fluorescence detector.
It is an object of the present invention to provide a latent image reading device in which the reflection is performed only once.
【０００７】[0007]
【課題を解決するための手段】本発明は、潜像の記録さ
れた蓄積性蛍光体に励起光線を照射して、そこから発生
する蛍光を検出する潜像読み取り装置において、次の特
徴を備えるものである。 （イ）前記蓄積性蛍光体の記録面を円筒面の内面に沿う
形状とする。 （ロ）前記円筒面の中心線に沿って進行する励起光線
を、ミラー系を用いて、前記記録面に垂直な方向に向け
る。 （ハ）前記ミラー系を経由した励起光線を、選択ミラー
を通過させてから前記蓄積性蛍光体に照射する。 （ニ）前記蓄積性蛍光体で発生した蛍光を、前記選択ミ
ラーを用いて、前記中心線に平行な方向に向ける。 （ホ）前記励起光線が前記ミラー系に入射するときの進
行方向と、前記蛍光が前記選択ミラーで反射した後に進
行する方向とが一致するように、前記選択ミラーを配置
する。 （ヘ）前記選択ミラーで反射した蛍光を蛍光検出装置で
検出する。 （ト）前記ミラー系と前記選択ミラーとを前記中心線の
回りで回転可能にする。 （チ）前記ミラー系と前記選択ミラーと前記蛍光検出装
置とを、前記蓄積性蛍光体に対して、前記中心線に平行
な方向に相対的に移動可能にする。SUMMARY OF THE INVENTION The present invention provides a latent image reading apparatus for irradiating a stimulable light beam on a stimulable phosphor having a latent image recorded thereon and detecting fluorescence emitted from the stimulable light beam, which has the following features. It is a thing. (A) The recording surface of the stimulable phosphor is formed along the inner surface of the cylindrical surface. (B) An excitation light ray traveling along the center line of the cylindrical surface is directed in a direction perpendicular to the recording surface by using a mirror system. (C) The excitation light beam that has passed through the mirror system is passed through a selective mirror and then applied to the stimulable phosphor. (D) The fluorescence generated by the stimulable phosphor is directed in a direction parallel to the center line using the selection mirror. (E) The selection mirror is arranged so that the traveling direction when the excitation light beam is incident on the mirror system and the traveling direction after the fluorescence is reflected by the selection mirror coincide with each other. (F) The fluorescence reflected by the selection mirror is detected by the fluorescence detection device. (G) The mirror system and the selection mirror can be rotated around the center line. (H) The mirror system, the selection mirror, and the fluorescence detection device are made movable relative to the storage phosphor in a direction parallel to the center line.
【０００８】[0008]
【作用】本発明の読み取り装置によれば、円筒面の内面
に沿った形状の蓄積性蛍光体を、レーザ光を回転走査す
ることによって読み取ることができる。円筒面の中心線
に沿って進行してくるレーザ光は、ミラー系で反射する
ことによって、蓄積性蛍光体の記録面に垂直に進行する
ように向きを変えられる。レーザ光の照射によって蓄積
性蛍光体で発生した蛍光は、選択ミラーで反射すること
によって、円筒面の中心線に平行な方向に向きを変えら
れる。これにより、蛍光は、選択ミラーで１回反射する
だけですぐに蛍光検出装置で読み取られる。According to the reader of the present invention, the stimulable phosphor having a shape along the inner surface of the cylindrical surface can be read by rotationally scanning the laser light. The laser light traveling along the center line of the cylindrical surface can be redirected by being reflected by the mirror system so as to travel perpendicularly to the recording surface of the stimulable phosphor. The fluorescence generated by the stimulable phosphor by the irradiation of the laser light is reflected by the selective mirror, so that the fluorescence can be redirected in a direction parallel to the center line of the cylindrical surface. As a result, the fluorescence is read by the fluorescence detection device immediately after being reflected once by the selection mirror.
【０００９】[0009]
【実施例】図１は本発明の一実施例の斜視図であり、図
２はその平面図である。蓄積性蛍光体１０の記録面１２
は、中心線１４を中心とする円筒面の内面に沿った形状
をしている。この読み取り装置は、蓄積性蛍光体１０の
内面１２をレーザ光によって回転走査し、かつ、中心線
１４に平行な方向に読み取り光学系を移動させることに
よって、蓄積性蛍光体１０の全面を読み取るようにした
ものである。1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a plan view thereof. Recording surface 12 of stimulable phosphor 10
Has a shape along the inner surface of a cylindrical surface centered on the center line 14. This reader reads the entire surface of the stimulable phosphor 10 by rotating the inner surface 12 of the stimulable phosphor 10 with laser light and moving the reading optical system in a direction parallel to the center line 14. It is the one.
【００１０】読み取り装置は、大別して、レーザ光源１
６と、回転体１８の内部に収納された読み取り光学系
と、蛍光検出装置２０とからなる。レーザ光源１６と蛍
光検出装置２０は、蓄積性蛍光体１０の中心線１４と同
軸に配置されていて、移動台に搭載されている。この移
動台は中心線１４に平行な方向１５に直線往復運動でき
るものである。この移動台には、回転体１８が回転可能
に取り付けられている。この回転体１８は中心線１４の
回りを一方向に回転できる。The reading device is roughly classified into a laser light source 1
6, a reading optical system housed inside the rotating body 18, and a fluorescence detection device 20. The laser light source 16 and the fluorescence detection device 20 are arranged coaxially with the center line 14 of the stimulable phosphor 10 and are mounted on a movable table. The movable table is capable of linear reciprocating movement in a direction 15 parallel to the center line 14. The rotating body 18 is rotatably attached to the moving table. The rotating body 18 can rotate around the center line 14 in one direction.
【００１１】回転体１８の内部には、２枚のミラー２
２、２４からなるミラー系と、選択ミラー２６と、集光
レンズ２８とが配置され、これら内部構成は回転体１８
に固定されていて、回転体１８とともに回転する。ミラ
ー２２は中心線１４上に配置されていて、中心線１４に
沿って進行してくるレーザ光３０を、中心線１４から離
れた位置に配置されたミラー２４の方向に向ける働きを
する。ミラー２４は、レーザ光を蓄積性蛍光体１０の記
録面１２に垂直な方向（中心線１４に垂直な方向）に向
ける働きをする。選択ミラー２６は、ダイクロイックミ
ラーであり、レーザ光は透過させるが蛍光は反射する性
質を持つ。この選択ミラー２６は中心線１４上に配置さ
れていて、中心線１４に対して４５度だけ傾斜してい
る。集光レンズ２８は回転体１８の外周面の近傍に配置
されていて、蓄積性蛍光体１０の記録面１２で発生した
蛍光を集めてこれをほぼ平行な光線にする。蛍光検出装
置２０の手前にはフィルター３４があり、このフィルタ
ー３４は、赤色光をカットするためのブルーフィルター
である。蛍光検出装置２０は光電子増倍管からなり、こ
れによって蛍光の強度が検出される。Inside the rotating body 18, two mirrors 2 are provided.
A mirror system composed of 2, 24, a selection mirror 26, and a condenser lens 28 are arranged.
It is fixed to and rotates with the rotating body 18. The mirror 22 is arranged on the center line 14, and serves to direct the laser light 30 traveling along the center line 14 toward the mirror 24 arranged at a position away from the center line 14. The mirror 24 serves to direct the laser light in a direction perpendicular to the recording surface 12 of the stimulable phosphor 10 (direction perpendicular to the center line 14). The selection mirror 26 is a dichroic mirror and has a property of transmitting laser light but reflecting fluorescence. The selection mirror 26 is disposed on the center line 14 and is inclined by 45 degrees with respect to the center line 14. The condenser lens 28 is arranged in the vicinity of the outer peripheral surface of the rotating body 18, and collects the fluorescence generated on the recording surface 12 of the stimulable phosphor 10 to make it into substantially parallel light rays. A filter 34 is provided in front of the fluorescence detection device 20, and this filter 34 is a blue filter for cutting red light. The fluorescence detection device 20 is composed of a photomultiplier tube, by which the intensity of fluorescence is detected.
【００１２】次に、この読み取り装置の動作を説明す
る。レーザ光源１６で発生したレーザ光３０はミラー２
２、２４で反射して、蓄積性蛍光体１０の記録面１２に
垂直な方向に向けられる。このレーザ光は、選択ミラー
２６と集光レンズ２８を通過して、蓄積性蛍光体１０の
記録面１２上に照射される。レーザ光の当たった部分に
潜像が記録されていると、そこから蛍光が発生する。こ
の蛍光は集光レンズ２８で集められて平行光線となり、
選択ミラー２６で反射して、中心線１４に平行な方向に
向けられる。選択ミラー２６で反射した後の蛍光３２の
進行方向と、ミラー２２に入射するときのレーザ光３０
の進行方向とは同じになる。すなわち、蛍光３２は、レ
ーザ光源１６の方向には戻らずに、レーザ光源１６とは
反対の側に配置されている蛍光検出装置２０の方向に向
けられる。この蛍光３２は、フィルター３４で赤色光を
カットされて、蛍光検出装置２０でその強度が検出され
る。Next, the operation of this reading device will be described. The laser light 30 generated by the laser light source 16 is reflected by the mirror 2
The light is reflected at 2, 24 and is directed in a direction perpendicular to the recording surface 12 of the stimulable phosphor 10. The laser light passes through the selection mirror 26 and the condenser lens 28 and is irradiated onto the recording surface 12 of the stimulable phosphor 10. When a latent image is recorded on the portion exposed to the laser light, fluorescence is generated from the latent image. This fluorescent light is collected by the condenser lens 28 to become parallel rays,
It is reflected by the selection mirror 26 and directed in a direction parallel to the center line 14. The traveling direction of the fluorescence 32 after being reflected by the selection mirror 26 and the laser light 30 when entering the mirror 22.
Is the same as the direction of travel. That is, the fluorescence 32 does not return to the direction of the laser light source 16 but is directed to the direction of the fluorescence detection device 20 arranged on the side opposite to the laser light source 16. The fluorescence 32 has its red light cut off by the filter 34, and its intensity is detected by the fluorescence detection device 20.
【００１３】上述のような読み取り作業は、蓄積性蛍光
体１０を静止させた状態で、回転体１８を回転させなが
ら行う。これにより、蓄積性蛍光体１０の記録面１２を
周方向に読み取ることができる。さらに、回転体１８を
１回転させるごとに、上述の移動台を中心線１４に平行
な方向１５に１ステップだけ移動させる。これによっ
て、上述の周方向の読み取りが、軸方向に順番に繰り返
されることになる。その結果、蓄積性蛍光体１０の記録
面１２の全面を読み取ることができる。The above-mentioned reading operation is performed while rotating the rotating body 18 with the stimulable phosphor 10 stationary. As a result, the recording surface 12 of the stimulable phosphor 10 can be read in the circumferential direction. Further, each time the rotating body 18 is rotated once, the above-mentioned movable table is moved by one step in the direction 15 parallel to the center line 14. As a result, the reading in the circumferential direction described above is sequentially repeated in the axial direction. As a result, the entire recording surface 12 of the stimulable phosphor 10 can be read.
【００１４】図３は本発明の別の実施例の平面図であ
る。この実施例では、レーザ光源１６の配置が図２の場
合とは異なっている。レーザ光源１６からミラー２２に
至る構成以外の点は図２と同じであり、図２と同じ部分
には同じ符号を付けてある。FIG. 3 is a plan view of another embodiment of the present invention. In this embodiment, the arrangement of the laser light source 16 is different from that shown in FIG. 2 is the same as in FIG. 2 except for the configuration from the laser light source 16 to the mirror 22, and the same parts as those in FIG.
【００１５】レーザ光源１６は、蓄積性蛍光体１０の中
心線１４からは離れた位置に配置されている。レーザ光
源１６を出たレーザ光は、赤色フィルター３８とビーム
エクスパンダー４０とを通過して、２枚のミラー４２、
４４で反射してから、回転体１８の内部のミラー２２に
入射する。赤色フィルター３８は、レーザ光源１６から
の青色光をカットして、赤色光（波長６３３ｎｍ）だけ
を通過させるガラスフィルターである。レーザ光源１６
からの青色光が蛍光検出装置２０に迷光として入射する
と、バックグラウンドノイズが増加するので、赤色フィ
ルター３８はこれを防いでいる。ビームエクスパンダー
４０は、レーザ光源１６からのレーザビーム直径を大き
くするための光学部品である。集光レンズ２８に入射す
るレーザ径は大きい方が、蓄積性蛍光体１０の記録面１
２上での焦点サイズが小さくなる。ミラー４２、４４は
レーザ光の方向を１８０°変えるための部品である。こ
れにより、レーザ光源１６を回転体１８の横に配置する
ことができるので、読み取り装置全体として中心線１４
方向の大きさを小さくすることができる。The laser light source 16 is arranged at a position away from the center line 14 of the stimulable phosphor 10. The laser light emitted from the laser light source 16 passes through the red filter 38 and the beam expander 40, and the two mirrors 42,
After being reflected by 44, the light enters the mirror 22 inside the rotating body 18. The red filter 38 is a glass filter that cuts blue light from the laser light source 16 and passes only red light (wavelength 633 nm). Laser light source 16
When the blue light from the above enters the fluorescence detection device 20 as stray light, background noise increases, and the red filter 38 prevents this. The beam expander 40 is an optical component for increasing the diameter of the laser beam from the laser light source 16. The larger the diameter of the laser beam entering the condenser lens 28, the larger the recording surface 1 of the stimulable phosphor 10.
The focal size on 2 becomes smaller. The mirrors 42 and 44 are components for changing the direction of laser light by 180 °. As a result, the laser light source 16 can be arranged beside the rotating body 18, so that the center line 14 of the reading device as a whole is
The size of the direction can be reduced.
【００１６】図４は、図２に示す実施例において、蓄積
性蛍光体１０からフィルター３４にいたる蛍光光路の途
中にパイプ４６、４８を配置した例である。すなわち、
集光レンズ２８と選択ミラー２６との間にパイプ４６を
配置し、選択ミラー２６とフィルター３４との間にパイ
プ４８を配置してある。蛍光３２はパイプ４６と４８の
内部を通過するようになっている。このようにすると、
蓄積性蛍光体１０からの蛍光の発散光５０を、効率良く
蛍光検出装置に導くことができる。FIG. 4 is an example in which pipes 46 and 48 are arranged in the fluorescent light path from the stimulable phosphor 10 to the filter 34 in the embodiment shown in FIG. That is,
A pipe 46 is arranged between the condenser lens 28 and the selection mirror 26, and a pipe 48 is arranged between the selection mirror 26 and the filter 34. The fluorescent light 32 passes through the insides of the pipes 46 and 48. This way,
The divergent light 50 of fluorescence from the stimulable phosphor 10 can be efficiently guided to the fluorescence detection device.
【００１７】本発明は上述の実施例に限定されず、次の
ような変更が可能である。 （１）上述の実施例では、回転体１８を１回転させるご
とに移動台を１ステップだけ移動させているが、回転体
１８を回転させながら移動台を連続的に移動させてもよ
い。この場合は、記録面１２をらせん状に読み取ること
になる。The present invention is not limited to the above embodiment, but the following modifications are possible. (1) In the above-described embodiment, the moving table is moved by one step each time the rotating body 18 is rotated once, but the moving table may be continuously moved while rotating the rotating body 18. In this case, the recording surface 12 is read spirally.
【００１８】（２）選択ミラー２６としては、上述のダ
イクロイックミラーのほかに、レーザ光を通すために中
心部に小さい貫通孔をあけた反射ミラーを用いてもよ
い。(2) As the selection mirror 26, in addition to the above-mentioned dichroic mirror, a reflection mirror having a small through hole in the center for passing laser light may be used.
【００１９】（３）上述の実施例では蓄積性蛍光体１０
を静止させているが、蓄積性蛍光体１０を移動台に載せ
て中心線１４に平行な方向１５に移動させてもよい。こ
の場合は、レーザ光源１６と回転体１８と蛍光検出装置
２０は、中心線１４に平行な方向１５には固定してお
く。(3) In the above embodiment, the stimulable phosphor 10 is used.
However, the stimulable phosphor 10 may be placed on a movable table and moved in a direction 15 parallel to the center line 14. In this case, the laser light source 16, the rotating body 18, and the fluorescence detection device 20 are fixed in the direction 15 parallel to the center line 14.
【００２０】（４）図４に示すようなパイプは、レーザ
光の光路の途中に設けてもよい。これにより、レーザ光
の散乱光（迷光）が外部に洩れるのを防ぐことができ
る。(4) The pipe as shown in FIG. 4 may be provided in the optical path of the laser light. This can prevent scattered light (stray light) of the laser light from leaking to the outside.
【００２１】[0021]
【発明の効果】本発明の読み取り装置によれば、蓄積性
蛍光体をレーザ光で回転走査して読み取る際に、蓄積性
蛍光体で発生した蛍光を選択ミラーで１回反射させるだ
けで蛍光検出装置で検出することができる。したがっ
て、蛍光検出装置で検出するまでの蛍光の反射回数を最
小限にすることができ、反射による蛍光強度の減衰を少
なくできる。また、蛍光の発生から検出までに至る経路
を短くできるので、同様に蛍光強度の減衰を少なくで
き、また、蛍光検出装置に到達したときの蛍光の発散も
小さくできる。According to the reading device of the present invention, when the stimulable phosphor is rotationally scanned with a laser beam to be read, the fluorescence generated by the stimulable phosphor is detected only by reflecting it once by the selective mirror. It can be detected by the device. Therefore, it is possible to minimize the number of times the fluorescence is reflected before being detected by the fluorescence detection device, and to reduce the attenuation of the fluorescence intensity due to the reflection. Further, since the path from the generation of fluorescence to the detection can be shortened, the attenuation of the fluorescence intensity can be reduced as well, and the divergence of fluorescence when reaching the fluorescence detection device can be reduced.
【図１】本発明の一実施例の斜視図である。FIG. 1 is a perspective view of an embodiment of the present invention.
【図２】図１の装置の平面図である。2 is a plan view of the device of FIG. 1. FIG.
【図３】本発明の別の実施例の平面図である。FIG. 3 is a plan view of another embodiment of the present invention.
【図４】蛍光光路にパイプを配置した状態の平面図であ
る。FIG. 4 is a plan view showing a state in which a pipe is arranged in a fluorescent light path.
１０…蓄積性蛍光体 １２…記録面 １４…中心線 １６…レーザ光源 １８…回転体 ２０…蛍光検出装置 ２２、２４…ミラー ２６…選択ミラー ３０…レーザ光 ３２…蛍光 10 ... Accumulative phosphor 12 ... Recording surface 14 ... Center line 16 ... Laser light source 18 ... Rotating body 20 ... Fluorescence detection device 22, 24 ... Mirror 26 ... Selection mirror 30 ... Laser light 32 ... Fluorescence
Claims (1)
線を照射して、そこから発生する蛍光を検出する潜像読
み取り装置において、次の特徴を備える潜像読み取り装
置。 （イ）前記蓄積性蛍光体の記録面を円筒面の内面に沿う
形状とする。 （ロ）前記円筒面の中心線に沿って進行する励起光線
を、ミラー系を用いて、前記記録面に垂直な方向に向け
る。 （ハ）前記ミラー系を経由した励起光線を、選択ミラー
を通過させてから前記蓄積性蛍光体に照射する。 （ニ）前記蓄積性蛍光体で発生した蛍光を、前記選択ミ
ラーを用いて、前記中心線に平行な方向に向ける。 （ホ）前記励起光線が前記ミラー系に入射するときの進
行方向と、前記蛍光が前記選択ミラーで反射した後に進
行する方向とが一致するように、前記選択ミラーを配置
する。 （ヘ）前記選択ミラーで反射した蛍光を蛍光検出装置で
検出する。 （ト）前記ミラー系と前記選択ミラーとを前記中心線の
回りで回転可能にする。 （チ）前記ミラー系と前記選択ミラーと前記蛍光検出装
置とを、前記蓄積性蛍光体に対して、前記中心線に平行
な方向に相対的に移動可能にする。1. A latent image reading device for irradiating an stimulating ray on a stimulable phosphor having a latent image recorded thereon and detecting fluorescence emitted from the stimulating ray, wherein the latent image reading device has the following features. (A) The recording surface of the stimulable phosphor is formed along the inner surface of the cylindrical surface. (B) An excitation light ray traveling along the center line of the cylindrical surface is directed in a direction perpendicular to the recording surface by using a mirror system. (C) The excitation light beam that has passed through the mirror system is passed through a selective mirror and then applied to the stimulable phosphor. (D) The fluorescence generated by the stimulable phosphor is directed in a direction parallel to the center line using the selection mirror. (E) The selection mirror is arranged so that the traveling direction when the excitation light beam is incident on the mirror system and the traveling direction after the fluorescence is reflected by the selection mirror coincide with each other. (F) The fluorescence reflected by the selection mirror is detected by the fluorescence detection device. (G) The mirror system and the selection mirror can be rotated around the center line. (H) The mirror system, the selection mirror, and the fluorescence detection device are made movable relative to the storage phosphor in a direction parallel to the center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19900892A JP3278812B2 (en) | 1992-07-03 | 1992-07-03 | Latent image reading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19900892A JP3278812B2 (en) | 1992-07-03 | 1992-07-03 | Latent image reading device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0619014A true JPH0619014A (en) | 1994-01-28 |
| JP3278812B2 JP3278812B2 (en) | 2002-04-30 |
Family
ID=16400578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19900892A Expired - Fee Related JP3278812B2 (en) | 1992-07-03 | 1992-07-03 | Latent image reading device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3278812B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0864881A2 (en) * | 1997-01-31 | 1998-09-16 | Orion-Yhtymä Oy | Method for balancing a rotating reading device for an image plate |
| US5900640A (en) * | 1996-06-18 | 1999-05-04 | Fuji Photo Film Co., Ltd. | Image reading apparatus |
| WO2000004376A1 (en) * | 1998-07-17 | 2000-01-27 | Japan Science And Technology Corporation | Imaging plate x-ray diffraction apparatus |
| EP1032860A1 (en) * | 1997-11-20 | 2000-09-06 | Digident Ltd. | Scanning apparatus |
| EP1296181A2 (en) | 2001-09-19 | 2003-03-26 | Rigaku Corporation | X-ray image reader |
| US6624438B2 (en) | 1997-11-20 | 2003-09-23 | Orex Computed Radiography Ltd. | Scanning apparatus |
| WO2011082736A1 (en) * | 2009-12-21 | 2011-07-14 | DüRR DENTAL AG | Detection unit for test beams, reading unit and examination device comprising said type of detection unit |
-
1992
- 1992-07-03 JP JP19900892A patent/JP3278812B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900640A (en) * | 1996-06-18 | 1999-05-04 | Fuji Photo Film Co., Ltd. | Image reading apparatus |
| EP0864881A2 (en) * | 1997-01-31 | 1998-09-16 | Orion-Yhtymä Oy | Method for balancing a rotating reading device for an image plate |
| EP0864881A3 (en) * | 1997-01-31 | 2002-03-20 | Orion-Yhtymä Oy | Method for balancing a rotating reading device for an image plate |
| EP1032860A1 (en) * | 1997-11-20 | 2000-09-06 | Digident Ltd. | Scanning apparatus |
| US6624438B2 (en) | 1997-11-20 | 2003-09-23 | Orex Computed Radiography Ltd. | Scanning apparatus |
| US6791101B2 (en) | 1997-11-20 | 2004-09-14 | Orex Computed Radiography Ltd. | Scanning apparatus |
| EP1032860A4 (en) * | 1997-11-20 | 2005-03-09 | Orex Computed Radiography Ltd | Scanning apparatus |
| WO2000004376A1 (en) * | 1998-07-17 | 2000-01-27 | Japan Science And Technology Corporation | Imaging plate x-ray diffraction apparatus |
| US6418190B1 (en) | 1998-07-17 | 2002-07-09 | Japan Science And Technology Corporation | Imaging plate X-ray diffraction apparatus |
| EP1296181A2 (en) | 2001-09-19 | 2003-03-26 | Rigaku Corporation | X-ray image reader |
| EP1296181A3 (en) * | 2001-09-19 | 2006-07-26 | Rigaku Corporation | X-ray image reader |
| WO2011082736A1 (en) * | 2009-12-21 | 2011-07-14 | DüRR DENTAL AG | Detection unit for test beams, reading unit and examination device comprising said type of detection unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3278812B2 (en) | 2002-04-30 |
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