A focusing scanning type photomultiplier tube

A photomultiplier tube and scanning technology, which is applied to the detailed information of the electron multiplier, the dynode, etc., can solve the problem of low detection accuracy of the laser radar

Pending Publication Date: 2018-12-21
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0006] In order to solve the technical problem of low actual detection accurac

Method used

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  • A focusing scanning type photomultiplier tube
  • A focusing scanning type photomultiplier tube
  • A focusing scanning type photomultiplier tube

Examples

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Embodiment

[0059] The present invention will be further described below by taking a microchannel plate photomultiplier tube as an example. It should be noted that the embodiments described here are for illustration only and do not limit the present invention.

[0060] In this example:

[0061] The optical input window 2 located on the vacuum vessel 1 adopts a plane optical input window;

[0062] The focusing system is composed of the first focusing electrode 41, the second focusing electrode 42 and the third focusing electrode 43 of different shapes arranged in sequence; the first focusing electrode 41, the second focusing electrode 42 and the third focusing electrode 43 are hollow structures, not Affecting the movement of the electron beam, the specific shape is designed according to the requirements of the electric field distribution, and the design method is an existing known method.

[0063] The scanning system 5 is composed of four flat-plate electrodes 51-54 arranged opposite to ...

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Abstract

In order to solve the technical problem of low detection accuracy of lidar, A focusing-scanning type photomultiplier tube By providing a focusing system in a vacuum vessel of the photomultiplier tube,The scanning system and the electron multiplier cluster located at the focal point of the focusing system enable different electron multiplier regions to receive the signal electrons to be multipliedand output according to the time sequence, so that the same electron multiplier region has enough electron multiplication, electronic output and performance recovery time; Because the number of the electron multiplier cluster is tens or hundreds, the sampling frequency of the photomultiplier tube can be increased by tens or hundreds of times, and can be raised to the order of tens of GHz when theelectron multiplier cluster is effectively utilized.

Description

technical field [0001] The invention relates to a photodetection device, in particular to a focus scanning photomultiplier tube with GHz sampling frequency and single photon detection capability. Background technique [0002] Photomultiplier tube (PMT for short) is an electric vacuum photodetection device. Its main function is to convert weak optical signals into electrical signals, and amplify and output the electrical signals, so as to realize the function of target detection. Photomultiplier tubes have the characteristics of wide detection spectral range, large dynamic range, high electronic gain, low dark noise, and fast response speed, and are widely used in various fields such as medical treatment, detection, and scientific research. [0003] An important application field of photomultiplier tubes is lidar. At present, airborne laser ranging radars, shipborne underwater detection lidars, and high-altitude atmospheric detection lidars all use photomultiplier tubes as co...

Claims

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Application Information

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IPC IPC(8): H01J43/06
CPCH01J43/06
Inventor 刘虎林徐向晏李学龙田进寿吕沛吴国俊王兴辛丽伟卢裕陈萍韦永林赛小锋温文龙裴承全王俊锋何凯王超
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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