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Spectral analysis system

A spectral analysis and optical fiber technology, applied in the field of spectral analysis systems, can solve the problems of low detection efficiency, inability to continuously collect signals, and inability to use measurement with enhanced CCD cameras, and achieve reduced electromagnetic interference, high time resolution, high sensitivity and Effect

Inactive Publication Date: 2015-07-29
TSINGHUA UNIV
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  • Description
  • Claims
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Problems solved by technology

Limited by factors such as the photocathode material and the luminous efficiency of the fluorescent plate, the detection efficiency of the enhanced CCD camera is lower than that of the photomultiplier tube
At the same time, although the exposure time of the enhanced CCD camera can reach the nanosecond level, it cannot continuously collect signals due to factors such as signal accumulation, CCD charge transfer speed, and analog-to-digital conversion speed. It must accumulate signals in multiple cycles, so the acquisition efficiency is low. Low and requires that the optical signal must be periodically repeated, and cannot be used for the measurement of transient non-repetitive optical signals

Method used

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Embodiment Construction

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0021] The present invention aims to propose a spectral analysis system that can obtain the spectral signal intensity at different wavelengths within a certain wavelength range at the same time, has high sensitivity at the single photon level and time resolution capability at the nanosecond level, and can continuously collect signals.

[0022] According to the spectral analysis system of the embodiment of the present invention, such as figure 1 and figure 2 As shown, it may include: a Cheney-Turner optical path structure 10 , a...

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Abstract

A spectrum analysis system, comprising a Czerny-Turner optical path structure (10), a photomultiplier array (20) which comprises N photomultipliers, an optical fibre array (30), a multi-channel time gating counter (40), a high-voltage power supply (50), and a temperature control module (60) which is connected to the photomultiplier array (20) and used for making same keep in a constant low temperature environment during spectrum measurement, wherein the optical fibre array (30) comprises N groups of optical fibres. The first ends of each group of optical fibres are arranged into one column parallel to the direction of an incident slit (11), installed on a focusing plane of the Czerny-Turner optical path structure (10) and used for collecting monochromatic light with different wavelengths, and the second ends of the N groups of optical fibres are connected to the N photomultipliers in a mode of one-to-one correspondence so as to conduct light signals with different wavelengths to different photomultipliers, N being a positive integer. The system has the advantage of having high sensitivity and high time resolving power at the same time, and can be used for collecting weak, rapidly changing and non-repetitive spectrum signals.

Description

technical field [0001] The invention belongs to the field of analysis instruments, and in particular relates to a spectrum analysis system. Background technique [0002] The spectrometer is a general-purpose spectral analysis instrument, which is widely used in research fields such as plasma physics and atomic and molecular physics. Taking the study of low-temperature plasma physics as an example, the most basic way to understand the behavior of various particles in plasma is to measure the emission lines of various particles. The emission spectrum of low-temperature plasma contains many atomic and molecular spectral lines, and is distributed in a wide wavelength range from ultraviolet to infrared. At the same time, for a plasma in a non-steady state, its emission spectrum changes with time, and may be non-periodic and non-repeating. In order to understand the complex physical and chemical processes in plasma, it is usually necessary to collect many weak spectral lines in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28
CPCG01J3/443G01J3/021G01J3/0218G01J3/1804
Inventor 陈文聪蒲以康
Owner TSINGHUA UNIV
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