Patent ID: 6946641
Filing Date: 2005-09-20
Classification: H01J

Abstract:
1. A photomultiplier tube comprising: a faceplate for receiving light incident thereon; a photocathode for emitting electrons in response to the light incident on the faceplate; an electron multiplier in a hermetically sealed vessel for multiplying electrons emitted from the photocathode; and an anode for generating an output signal based on electrons multiplied by the electron multiplier, wherein the hermetically sealed vessel includes: a stem plate having stem pins for fixing the electron multiplier and the anode thereon; a metal side tube having two open ends and enclosing the electron multiplier and the anode, the stem plate being fixed at one open end; and the faceplate having a surface for receiving the light thereon and an outer periphery side therearound, the faceplate being fixed to the other open end of the- metal side tube, the faceplate being made from glass, and wherein the metal side tube has an edge portion at the other open end of the metal side tube, the edge portion being embedded in the faceplate, thereby being positioned inside the outer periphery side of the faceplate.