Scintillator member and manufacturing method thereof, and radiation measuring device

• US 20060151706A1
• Filed: 01/11/2006
• Published: 07/13/2006
• Est. Priority Date: 01/13/2005
• Status: Active Grant

• Current Assignee: Nippon Raytech Company Limited
• Original Assignee: Aloka Company Limited (Hitachi, Ltd.)
• Inventors: Matsubara, Shohei, Minagawa, Eiichi
• Granted Patent: US 7,402,809 B2
• Time in Patent Office: Days
• US Class Current: 250/368
• CPC Class Codes: G01T 1/2002 Optical details, e.g. reflecting or diffusing layers

Abstract

When a heating process is performed in a state where a thermal transfer sheet is superimposed on a scintillator plate, a film of the thermal transfer sheet is separated from the thermal transfer sheet and adhered onto the scintillator plate. The film includes a protective layer, an aluminum layer, and an adhesive layer. The aluminum layer is protected by the protective layer. Because the scintillator plate by itself functions as a rear surface support substrate with respect to the protective layer and the aluminum layer, a film which is highly resistive against an external effect can be formed. A plurality of films can be layered on the scintillator plate. A pressure transfer method can also be used for formation of the film. A scintillator member in which the film has been formed is disposed in a radiation measuring device.

Claims

1. A scintillator member comprising:

a scintillator which emits light when radiation enters the scintillator; and

at least one film formed on a surface side of the scintillator which serves as a radiation entering surface side,

wherein

the film includes a protective layer which transmits the radiation therethrough, a light tight layer which is formed on a rear surface side of the protective layer, transmits the radiation, and prevents transmission of light, and an adhesive layer which is provided on a rear surface side of the light tight layer for adhering the film onto the scintillator, and

the film is a strip film which has been transferred from a transfer sheet onto the surface of the scintillator.

2. A scintillator member according to claim 1, wherein

the transfer sheet is a thermal transfer sheet, and the film has been formed by using a thermal transfer method.

3. A scintillator member according to claim 1, wherein

the light tight layer is a deposition layer containing aluminum.

4. A scintillator member according to claim 1, wherein

the protective layer is a colored layer having a light shielding effect.

5. A scintillator member according to claim 1, wherein

a plurality of films are layered on the surface side of the scintillator, and

each film includes the protective layer, the light tight layer, and the adhesive layer.

6. A scintillator member according to claim 1, wherein

the radiation is a β

ray.

7. A scintillator member according to claim 1, wherein

a reflective material which reflects light entering from a rear surface side of the film is included in the adhesive layer.

8. A radiation measuring device comprising:

a scintillator member;

a container which encloses a rear surface side of the scintillator member; and

a light detector for detecting light emitted from the rear surface side of the scintillator member,

wherein

the scintillator member includes;

a scintillator which emits light when radiation enters the scintillator; and

at least one film formed on a surface side of the scintillator which serves as a radiation entering surface side,

the film including a protective layer which transmits the radiation therethrough, a light tight layer which is formed on a rear surface side of the protective layer, transmits the radiation, and prevents transmission of light, and an adhesive layer which is provided on a rear surface side of the light tight layer for adhering the film onto the scintillator,

and wherein

the film is a strip film which has been transferred from a transfer sheet onto the surface of the scintillator.

9. A radiation measuring device according to claim 8, wherein

a reinforcing member having transparency is provided on a rear surface side of the scintillator member.

10. A radiation measuring device according to claim 8, wherein

a plurality of films are layered on a top surface side of the scintillator member, and

each of the films includes the protective layer, the light tight layer, and the adhesive layer.

11. A radiation measuring device according to claim 8, wherein

at least one separate light tight film is provided on a top surface side of the scintillator member in such a manner that the separate light tight film is spaced from the scintillator member.

12. A radiation measuring device according to claim 8, wherein

the top surface side of the scintillator member is covered with a protective grille having a plurality of openings.

13. A method of manufacturing a scintillator member using a transfer sheet including a base layer and a film, comprising:

at least one transfer step of transferring the film from the transfer sheet onto a scintillator plate,

wherein

the transfer step includes a step of applying heat or pressure onto the transfer sheet while the transfer sheet is being superimposed on the scintillator plate to thereby separate the film from the transfer sheet and adhere the film onto the scintillator plate, and

the film includes a light tight layer which transmits radiation therethrough and also prevents transmission of light.

14. A method of manufacturing a scintillator member according to claim 13, wherein

the transfer step is performed at least twice, for layering a plurality of films on the scintillator plate.

15. A method of manufacturing a scintillator member according to claim 13, wherein

the transfer step includes a step of cleaning a surface of the scintillator plate prior to adhering of the film onto the scintillator plate.

16. A method of manufacturing a scintillator member according to claim 13, wherein

during the transfer step, a support plate is provided on a rear surface side of the scintillator plate.