JP3000379B2 - X-ray fluorescent screen - Google Patents
X-ray fluorescent screenInfo
- Publication number
- JP3000379B2 JP3000379B2 JP2221833A JP22183390A JP3000379B2 JP 3000379 B2 JP3000379 B2 JP 3000379B2 JP 2221833 A JP2221833 A JP 2221833A JP 22183390 A JP22183390 A JP 22183390A JP 3000379 B2 JP3000379 B2 JP 3000379B2
- Authority
- JP
- Japan
- Prior art keywords
- ray
- fluorescent screen
- image sensor
- ray fluorescent
- phosphor
- 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
- Conversion Of X-Rays Into Visible Images (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Luminescent Compositions (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、産業用，医療用等に使われているＸ線用蛍
光スクリーンに関するものである。Description: TECHNICAL FIELD The present invention relates to an X-ray fluorescent screen used for industrial use, medical use, and the like.
本発明は、支持体もしくは基板上にRx（LnyLn′1-y）
（MO4）ｚ （Ｒ＝Li,Na,K Ln＝Ce,Pr,Sm,Eu,Tb,Dy,H
o,Er,Tm,Yb Ln′＝La,Gd,Y Ｍ＝W,Mo ｘ＝１のとき
ｚ＝２または ｘ＝５のときｚ＝4,0.1≦ｙ≦1.0）のい
ずれか一種の蛍光膜を形成させることにより、ｘ線照射
による発光効率を高め感度の向上を図ったものである。In the present invention, R x (LnyLn ′ 1-y ) is formed on a support or a substrate.
(MO 4 ) z (R = Li, Na, K Ln = Ce, Pr, Sm, Eu, Tb, Dy, H
o, Er, Tm, Yb Ln '= La, Gd, Y M = W, Mo x = 1 when z = 2 or x = 5 when z = 4, 0.1 <y <1.0 By forming a film, the luminous efficiency by x-ray irradiation is increased and the sensitivity is improved.
従来、Ｘ線用蛍光スクリーンは、母体結晶に発光イオ
ンをドープした材料を、支持体もしくは基板上に形成さ
せたものであった。Conventionally, X-ray fluorescent screens are formed by forming a material in which a host crystal is doped with luminescent ions on a support or a substrate.
上記のような蛍光スクリーンでは、発光効率が15％程
度と低いことに欠点があり、この解決に課題があった。The fluorescent screen as described above has a drawback in that the luminous efficiency is as low as about 15%, and there is a problem in solving this.
上記課題点を解決するために、本発明では、Ｘ線蛍光
スクリーンの蛍光体をRx（LnyLn′1-y）（MO4）ｚ
（Ｒ＝Li,Na,K Ln＝Ce,Pr,Sm,Eu,Tb,Dy,Ho,Er,Tm,Yb
Ln′＝La,Gd,Y Ｍ＝W,Mo ｘ＝１のときｚ＝２または
ｘ＝５のときｚ＝4,0.1≦ｙ≦1.0）とし、化合物中の
発光イオンの濃度を高めるものとした。To solve the above problem points, in the present invention, the phosphor of the X-ray fluorescent screen Rx (Ln y Ln '1- y) (MO 4) z
(R = Li, Na, K Ln = Ce, Pr, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb
Ln '= La, Gd, Y M = W, Mo When x = 1, z = 2 or when x = 5, z = 4,0.1 ≦ y ≦ 1.0) to increase the concentration of luminescent ions in the compound. did.
上記の蛍光体は、化学量論的な化合物であり、高濃度
な発光イオンによる濃度消光を起こし難い。この様な蛍
光体を用いることにより、蛍光スクリーンの発光効率を
上げることができる。The above-described phosphor is a stoichiometric compound, and hardly causes concentration quenching due to a high concentration of luminescent ions. By using such a phosphor, the luminous efficiency of the fluorescent screen can be increased.
以下に本発明の実施例を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
〔第１実施例〕 第１実施例は、支持体が撮像素子上に設けたファイバ
ー部材であり、蛍光体としてNa5（Tb0.1La0.9）（WO4）
４を用いたＸ線イメージセンサーの場合である。[First Embodiment] The first embodiment is a fiber member in which a support is provided on an image sensor, and Na 5 (Tb 0.1 La 0.9 ) (WO 4 ) is used as a phosphor.
This is the case of an X-ray image sensor using No. 4 .
第１図にそのＸ線イメージセンサーの断面図を示す。
構成は、撮像素子の画像入力面４上にファイバー部材２
が光学接着剤を使って密着している。更に前記ファイバ
ー部材２上に、Ｘ線用蛍光スクリーン１を形成した構成
である。Ｘ線用蛍光スクリーン１は、蛍光体Na5（Tb0.1
La0.9）（WO4）４と合成樹脂を混合したものを、ファイ
バー部材２上に10〜50ミクロンの厚さに均一に塗布し
た。FIG. 1 shows a cross-sectional view of the X-ray image sensor.
The configuration is such that the fiber member 2 is placed on the image input surface 4 of the image sensor.
Are in close contact using an optical adhesive. Further, the X-ray fluorescent screen 1 is formed on the fiber member 2. The X-ray fluorescent screen 1 is made of phosphor Na 5 (Tb 0.1
A mixture of La 0.9 ) (WO 4 ) 4 and a synthetic resin was uniformly applied on the fiber member 2 to a thickness of 10 to 50 μm.
このＸ線用蛍光スクリーン１を用いたＸ線イメージセ
ンサーの出力強度は、従来の蛍光スクリーンを用いたＸ
線イメージセンサーの出力強度を100とすると700であっ
た。The output intensity of the X-ray image sensor using the X-ray fluorescent screen 1 is the same as the X-ray image sensor using the conventional fluorescent screen.
Assuming that the output intensity of the linear image sensor is 100, it was 700.
〔第２〜第６実施例〕 第２〜第６実施例では、表に示す蛍光体を用いてＸ線
用蛍光スクリーン１を作成し、ファイバー部材2,固体撮
像素子４等を用いることにより、第１実施例と同様にＸ
線イメージセンサーとして一体化した。[Second to Sixth Embodiments] In the second to sixth embodiments, a fluorescent screen 1 for X-rays is prepared using the phosphors shown in the table, and a fiber member 2, a solid-state imaging device 4, and the like are used. X as in the first embodiment.
Integrated as a line image sensor.
そのＸ線用蛍光スクリーン１を用いたＸ線イメージセ
ンサーの出力強度を、従来の蛍光体を用いたＸ線イメー
ジセンサーの出力強度を100として表に相対的に示す。The output intensity of the X-ray image sensor using the X-ray fluorescent screen 1 is relatively shown in the table, with the output intensity of the conventional X-ray image sensor using the phosphor as 100.
〔第７〜第８実施例〕 第７〜第８実施例では、蛍光体としてNa（Pr0.1L
a0.9）（WO4）２またはK5（Ce0.2Gd0.8）（MoO4）４を
用い、イメージインテンシファイアーを用いたＸ線イメ
ージセンサーの場合である。 [Seventh and eighth embodiments] In the seventh and eighth embodiments, Na (Pr 0.1 L) was used as the phosphor.
a 0.9 ) (WO 4 ) 2 or K 5 (Ce 0.2 Gd 0.8 ) (MoO 4 ) 4 and an X-ray image sensor using an image intensifier.
第２図にそのＸ線イメージセンサーの断面図を示す。
構成は、入射Ｘ線６が被写体７を通過してＸ線用蛍光ス
クリーン１上で光に変換された後、ミラー９及びレンズ
10を通して可視光イメージインテンシファイアー11でイ
メージングする構成である。Ｘ線用蛍光スクリーン１
は、蛍光体Na（Pr0.1La0.9）（WO4）２またはK5（Ce0.2
Gd0.8）（MoO4）４と合成樹脂を混合したものを、基板
上に20〜50ミクロンの厚さに均一に塗布した。FIG. 2 shows a cross-sectional view of the X-ray image sensor.
After the incident X-ray 6 passes through the subject 7 and is converted into light on the X-ray fluorescent screen 1, the mirror 9 and the lens
This is a configuration in which imaging is performed by a visible light image intensifier 11 through 10. X-ray fluorescent screen 1
Is the phosphor Na (Pr 0.1 La 0.9 ) (WO 4 ) 2 or K 5 (Ce 0.2
A mixture of Gd 0.8 ) (MoO 4 ) 4 and a synthetic resin was uniformly applied on a substrate to a thickness of 20 to 50 μm.
このＸ線用蛍光スクリーン１を用いたＸ線イメージセ
ンサーの出力強度は、従来の蛍光スクリーンを用いたＸ
線イメージセンサーの出力強度を100とすると800であっ
た。The output intensity of the X-ray image sensor using the X-ray fluorescent screen 1 is the same as the X-ray image sensor using the conventional fluorescent screen.
Assuming that the output intensity of the linear image sensor is 100, it was 800.
〔第９実施例〕 第９実施例は、支持体がフィルムであり、蛍光体とし
Na（Tm0.15Gd0.85）（WO4）２を用いたＸ線増感紙の場
合である。Ninth Embodiment In a ninth embodiment, the support is a film and the phosphor is
This is the case of an X-ray intensifying screen using Na (Tm 0.15 Gd 0.85 ) (WO 4 ) 2 .
第３図に、その断面図を示す。構成は、フィルム12上
にＸ線用蛍光スクリーンを形成した構成である。FIG. 3 shows a cross-sectional view thereof. The configuration is such that an X-ray fluorescent screen is formed on the film 12.
Ｘ線用蛍光スクリーンは、蛍光体Na（Tm0.15Gd0.85）
（WO4）２と合成樹脂を混合したものを、フィルム10上
に５〜10ミクロンの厚さに塗布した。X-ray fluorescent screen is phosphor Na (Tm 0.15 Gd 0.85 )
A mixture of (WO 4 ) 2 and a synthetic resin was applied on the film 10 to a thickness of 5 to 10 microns.
このＸ線用蛍光スクリーン１を用いたＸ線増感紙の発
光出力は、従来の蛍光スクリーンを用いたＸ線増感紙の
発光出力を100とすると700であった。The emission output of the X-ray intensifying screen using the X-ray fluorescent screen 1 was 700 when the emission output of the conventional X-ray intensifying screen using the fluorescent screen was 100.
〔第10〜第11実施例〕 第10〜第11実施例は、基板が鉛ガラスであり、蛍光体
としてＫ（Tb0.1Gd0.9）（MoO4）２または、Li5（Ho0.2
La0.8）（WO4）４を用い、目視用として利用する場合で
ある。[Tenth to eleventh embodiments] In the tenth to eleventh embodiments, the substrate is made of lead glass, and K (Tb 0.1 Gd 0.9 ) (MoO 4 ) 2 or Li 5 (Ho 0.2
La 0.8 ) (WO 4 ) 4 is used for visual observation.
第４図に、その断面図を示す。構成は、鉛ガラス14上
にＸ線用蛍光スクリーン１を形成させた構成である。FIG. 4 shows a cross-sectional view thereof. The configuration is such that the X-ray fluorescent screen 1 is formed on the lead glass 14.
Ｘ線用蛍光スクリーン１は、蛍光体Ｋ（Tb0.1Gd0.9）
（MoO4）２または、Li5（Ho0.2La0.8）（WO4）４と合成
樹脂を混合したものを、鉛ガラス14上に10〜50ミクロン
の厚さに塗布した。The X-ray fluorescent screen 1 is made of a phosphor K (Tb 0.1 Gd 0.9 )
A mixture of (MoO 4 ) 2 or Li 5 (Ho 0.2 La 0.8 ) (WO 4 ) 4 and a synthetic resin was applied on a lead glass 14 to a thickness of 10 to 50 μm.
このＸ線用蛍光スクリーン１を用いた場合の発光出力
は、従来の蛍光スクリーンを用いた場合の発光出力を10
0とすると、Tb系では950,Ho系では900であった。The emission output when using the X-ray fluorescent screen 1 is 10 times less than the emission output when using the conventional fluorescent screen.
Assuming 0, the value was 950 for Tb and 900 for Ho.
実施例では、Ｘ線用蛍光スクリーンの形成法として合
成樹脂を用いた方法を挙げたが、電着法，沈降法などの
塗布法を用いてもよい。In the embodiment, a method using a synthetic resin has been described as a method for forming the X-ray fluorescent screen, but a coating method such as an electrodeposition method or a sedimentation method may be used.
本発明によれば、化合物蛍光体Rx（LnyLn′1-y）（MO
4）ｚ （Ｒ＝Li,Na,K Ln＝Ce,Pr,Sm,Eu,Tb,Dy,Ho,Er,
Tm,Yb Ln′＝La,Gd,Y Ｍ＝W,Mo ｘ＝１のときｚ＝２
または ｘ＝５のときｚ＝4,0.1≦ｙ≦1.0）を用いるこ
とにより、発光効率が向上し、少ないＸ線量で用いるＸ
線用蛍光スクリーンを得ることができた。According to the present invention, compounds of the phosphor R x (Ln y Ln '1 -y) (MO
4 ) z (R = Li, Na, K Ln = Ce, Pr, Sm, Eu, Tb, Dy, Ho, Er,
Tm, Yb Ln '= La, Gd, Y M = W, Mox = 1, z = 2
Or when x = 5, z = 4, 0.1 ≦ y ≦ 1.0), the luminous efficiency is improved, and X used with a small amount of X
A line fluorescent screen was obtained.
第１図は、Ｘ線イメージセンサーとしての実施例を示す
断面図、第２図は、イメージインテンシファイアーを用
いたＸ線イメージセンサーとしての実施例を示す断面
図、第３図は、Ｘ線増感紙としての実施例を示す断面
図、第４図は、目視用としての実施例を示す断面図であ
る。 １……Ｘ線用蛍光スクリーン ２……ファイバー部材 ３……リードフレーム ４……固体撮像素子 ５……アルミナ基板 ６……入射Ｘ線 ７……被写体 ８……基板 ９……ミラー 10……レンズ 11……可視光イメージインテンシファイアー 12……台紙 13……フィルム 14……鉛ガラスFIG. 1 is a cross-sectional view showing an embodiment as an X-ray image sensor, FIG. 2 is a cross-sectional view showing an embodiment as an X-ray image sensor using an image intensifier, and FIG. FIG. 4 is a sectional view showing an example as an intensifying screen, and FIG. 4 is a sectional view showing an example for visual observation. DESCRIPTION OF SYMBOLS 1 ... X-ray fluorescent screen 2 ... Fiber member 3 ... Lead frame 4 ... Solid-state image sensor 5 ... Alumina substrate 6 ... Incoming X-ray 7 ... Subject 8 ... Substrate 9 ... Mirror 10 ... Lens 11… Visible light image intensifier 12… Mount 13… Film 14… Lead glass
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G21K 4/00 C09K 11/77 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 7 , DB name) G21K 4/00 C09K 11/77
Claims (1)
a,K Ln＝Ce,Pr,Sm,Eu,Tb,Dy,Ho,Er,Tm,Yb Ln′＝La,G
d,Y Ｍ＝W,Mo ｘ＝１のときｚ＝２または ｘ＝５の
ときｚ＝4,0.1≦ｙ≦1.0）のいずれか一種を、支持体も
しくは基板上に形成させたことを特徴とするＸ線用蛍光
スクリーン。[Claim 1] R x (Ln y Ln '1 -y) (MO 4) z (R = Li, N
a, K Ln = Ce, Pr, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb Ln '= La, G
d, Y M = W, Mo When x = 1, z = 2 or when x = 5, z = 4, 0.1 ≦ y ≦ 1.0) is formed on a support or substrate. X-ray fluorescent screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2221833A JP3000379B2 (en) | 1990-08-23 | 1990-08-23 | X-ray fluorescent screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2221833A JP3000379B2 (en) | 1990-08-23 | 1990-08-23 | X-ray fluorescent screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04104099A JPH04104099A (en) | 1992-04-06 |
| JP3000379B2 true JP3000379B2 (en) | 2000-01-17 |
Family
ID=16772911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2221833A Expired - Lifetime JP3000379B2 (en) | 1990-08-23 | 1990-08-23 | X-ray fluorescent screen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3000379B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634340A (en) * | 2012-03-19 | 2012-08-15 | 南京工业大学 | Double-perovskite red fluorescent powder for white light LED and preparation method thereof |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6585913B2 (en) * | 2001-07-30 | 2003-07-01 | General Electric Company | Scintillator compositions of alkali and rare-earth tungstates |
| US7238304B2 (en) * | 2003-08-04 | 2007-07-03 | Kabushiki Kaisha Fine Rubber Kenkyuusho | Green light emitting phosphor and light emitting device |
| JP4525907B2 (en) * | 2003-08-04 | 2010-08-18 | 株式会社ファインラバー研究所 | Green light emitting phosphor and light emitting device |
| KR100616513B1 (en) * | 2003-11-01 | 2006-08-29 | 삼성전기주식회사 | Phosphor, method for preparing the same, red LED using the phosphor, white LED using the phosphor, and active dynamic LCD |
| CN104560039A (en) * | 2014-12-18 | 2015-04-29 | 徐州市江苏师范大学激光科技有限公司 | Method for preparing molybdate red fluorescent powder |
-
1990
- 1990-08-23 JP JP2221833A patent/JP3000379B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634340A (en) * | 2012-03-19 | 2012-08-15 | 南京工业大学 | Double-perovskite red fluorescent powder for white light LED and preparation method thereof |
| CN102634340B (en) * | 2012-03-19 | 2013-12-25 | 南京工业大学 | Double-perovskite red fluorescent powder for white light LED and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04104099A (en) | 1992-04-06 |
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