Position sensitive photomultiplier

Details Position sensitive photomultiplier Position sensitive photomultiplier

1995-08-24

1997-06-10

Patel, Nimeshkumar

Electric lamp and discharge devices

Photosensitive

Photomultiplier

313532, 313540, H01J 4312, H01J 4304

Patent

active

056379595

ABSTRACT:
This invention relates to a photomultiplier for detecting the incident position of a plane of incidence, where a weak light beam is reached and to a photomultiplier having a structure for minimizing crosstalk near the incident position of the weak light beam to improve the precision of the position resolving power. Particularly, the anode of this photomultiplier, which extracts the incident position of the incident weak light as an electrical signal, is constituted by a first anode component for detecting the incident position of the incident plane in the X direction and a second anode component for detecting the incident position of the incident plane in the Y direction. The first and second anode components have flat surfaces. These flat surfaces cause the first and second anode components to capture secondary electrons emitted from a dynode in correspondence with the incident position of the weak light beam, at a position closer to the emission position. The photomultiplier detects the incident position of the weak light beam at a higher resolving power while minimizing the crosstalk.

REFERENCES:
patent: 4070578 (1978-01-01), Timothy et al.
patent: 4117366 (1978-09-01), Davis
patent: 4649314 (1987-03-01), Eschard
patent: 4937506 (1990-06-01), Kimura et al.
patent: 5077504 (1991-12-01), Helvy

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