ULTRAVIOLET RAY-DETECTING TUBE

Japanese Patent JP3854669

B2

PROBLEM TO BE SOLVED: To prevent fluorine and silica particles from entering a sealed container and improve reliability, by arranging an anode electrode and a cathode electrode at a position opposite to a window member of glass material shutting an opening part of a side tube of metallic material.
SOLUTION: On opening part of a metallic side tube 3 shielding ultraviolet rays is shut by a glass window member 4 in a sealed container V1, and the other opening part is shut by a ring-shaped metallic member 5. An anode electrode 1 is positioned by an upper part of a side wall of the metallic member 5. A cathode electrode 2 is arranged to face a mesh area 1m of a recessed part of the anode electrode 1, having a lead pin 6 extended to penetrate the metallic member 5. A rare gas such as argon or the like is sealed in the sealed container V1. When a voltage is impressed between the electrodes 1 and 2 and ultraviolet rays are projected on the cathode electrode 2 through the window member, generated photoelectrons are accelerated by an electric field, resulting in an electron decay. Many secondary electrons are emitted from the cathode electrode 2. A generated discharge current is detected as a current pulse, whereby the ultraviolet rays are detected.

JPS63286728	OPTICAL POWER METER
JPH01152322	ARRAY-LIKE PHOTO DETECTOR
JPS5855722	PHOTODETECTOR

Warashina Hidenaga
Shimazu Yuji

JP27077696A

December 06, 2006

October 14, 1996

Click for automatic bibliography generation  

Hamamatsu Photonics Co., Ltd.

G01J1/02; H01J47/02; (IPC1-7): G01J1/02; H01J47/02

JP4061852U
JP5290793A
JP6213711A
JP49059568A
JP10104059A

US4581536

Yoshiki Hasegawa
Tatsuya Shioda
Shiro Terasaki
Kazuo Yoshii

Previous Patent: COMPUTER SYSTEM ACTUALIZING SYSTEM MANAGEMENT MODE EXTENDED BY PROCESSOR

Next Patent: DEVICE AND METHOD FOR PROTECT