Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1996-03-14
1997-03-11
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
G01T 120
Patent
active
056104014
ABSTRACT:
A radiant ray-detector having a high resolving ability and capable of being easily produced as well as a method for producing the same are herein disclosed. The radiant ray-detector comprises a plurality of photomultiplier tubes 11 combined together and scintillator chips 1, wherein the scintillator chips 1 each is in the form of a hexahedron, more than one face thereof is mirror finished, the other faces are surface-toughened and a number of these scintillator chips 1 greater than the number of the photomultiplier tubes 11 are joined together so that the overall area of the resulting mirror surface of a group of scintillator chips 1 is approximately identical to the area of an entrance window 12 of each corresponding photomultiplier tube 11 and wherein different transmittances are imparted to individual coarse faces 4 of the scintillator chip 1 joined to those of other scintillator chips. In particular, the transmittances of these scintillator chip 1 are preferably designed such that they increase as the distance between the chips and the center of the group of chips increases. The method for producing the radiant ray-detector is characterized in that the transmittance of each joined face 4 of the scintillator chip 1 is controlled by properly selecting the particle size of abrasive grains used for finishing each coarse face.
REFERENCES:
patent: 5091650 (1992-02-01), Uchida et al.
patent: 5227634 (1993-07-01), Ryuo
Kuwabara Yoshinori
Ryuo Toshihiko
Hannaher Constantine
Shin-Etsu Chemical Co. , Ltd.
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