Photomultiplier with lens element

Details Photomultiplier with lens element Photomultiplier with lens element

1997-06-19

1999-01-26

O'Shea, Sandra

Electric lamp and discharge devices

Photosensitive

Photomultiplier

313524, 313110, 250207, 250214VT, H04J 4328

Patent

active

058642072

ABSTRACT:
A photomultiplier includes a photocathode (3); an electron multiplier section (60) for cascade-multiplying photoelectrons emitted from the photocathode (3); a faceplate (2) provided with the photocathode (3); a metal housing (1) accommodating the photocathode (3) and the electron multiplier section (60); and a structure disposed on the faceplate (2) for increasing the effective light entrance region of the faceplate (2). In a preferred embodiment the subject structure includes a lens element (30) attached to the faceplate for increasing the effective light entrance region of the faceplate (2). In order to improve the optical coupling efficiency, either the faceplate (2), or the lens element (30), or both the faceplate (2) and the lens element (30) may further include a protrusion.

REFERENCES:
patent: 2587589 (1952-03-01), Bordewick
patent: 3551841 (1970-12-01), Harrick
patent: 3567948 (1971-03-01), Oke et al.
patent: 5446529 (1995-08-01), Stettner et al.
patent: 5498926 (1996-03-01), Kyushima et al.
patent: 5504386 (1996-04-01), Kyushima et al.
patent: 5625447 (1997-04-01), Kikuchi et al.

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