| 摘要 |
PROBLEM TO BE SOLVED: To provide a photomultiplier tube in which condensing efficiency of radial rays incident, especially from the front side is improved, and the condensed radial rays can be connected much more efficiently to a photoelectric cathode, and has a high packaging density when assembled in an array, thereby imaging characteristics can be improved. SOLUTION: The improved condensing efficiency of the radial rays and the improved packaging density of the photomultiplier tube are obtained by combining many characteristics including that a taper is made at the edge of a face plate so that the face plate may demarcate a cross-sectional area same as or larger than the cross-sectional area of the photomultiplier tube, that the face plate and a metal tube are connected at the lower side of the face plate so that an optical path between the incident radial rays and the photoelectric cathode may not be obstructed, and that the tapered edge of the face plate may be used as a reflector for connecting the radial rays incident into the surroundings of the face plate to the photoelectric cathode. COPYRIGHT: (C)2006,JPO&NCIPI
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