Solar blind ultraviolet detector and solar blind ultraviolet detection system

Abstract

The invention discloses a solar blind ultraviolet detector and a solar blind ultraviolet detection system, and relates to the field of photoelectric detection. The solar blind ultraviolet detector comprises a shell, and further comprises a photocathode, a microchannel plate group and a multi-channel anode which are arranged at intervals in sequence and connected to the shell, wherein the shell isinternally provided with a vacuum chamber, and the microchannel plate group comprises at least two microchannel plates arranged in the vacuum chamber; the photocathode, the microchannel plates and themulti-channel anode are all provided with electrical connection terminals, and the other ends of the electrical connection terminals penetrate through the shell to be used for being connected with anexternal power source; an anode is provided with a plurality of electron receiving regions; the anode is further provided with pins electrically connected with the electronic receiving regions, and the pins are used for being connected with an external analog-to-digital converter; the solar blind ultraviolet detection system comprises the solar blind ultraviolet detector, and further comprises anultraviolet light collecting module, an analog-to-digital converter and an information processing terminal. The solar blind ultraviolet detector and the solar blind ultraviolet detection system havethe advantages that the sensitivity is high, the spatial resolution is high, the time resolution is high, and signal processing is facilitated.

Description

technical field [0001] The invention relates to the fields of optoelectronic devices and photoelectric detection, in particular to a solar-blind ultraviolet detector and a solar-blind ultraviolet detection system. Background technique [0002] The solar-blind ultraviolet band is a band with a wavelength of 204nm to 280nm. In this band, sunlight is strongly absorbed by the ozone layer during the process of passing through the earth's atmosphere, and basically cannot reach the ground. Therefore, within a certain height range from the earth's surface to the sky , generally there is no ultraviolet band. In daily life, there are occasions where ultraviolet light is emitted, such as during the operation of missiles, aircraft, ships, and vehicles, because they themselves will produce flame radiation, arc reflection, and ultraviolet beacons and other collectable sources, or When the target is provided with a UV light source, the detector can be used to detect such UV light precisel...

AI Technical Summary

Problems solved by technology

[0005] (1) Low sensitivity of the system: In order to achieve the purpose of imaging, the sensor needs to convert the information multiple times (at least through the conversion of the intensifier, relay element (relay coupling component) and CCD, and through the fluorescent screen and relay optical system, etc. treatment of more than two media), resulting in low signal utilization (about 1%) and a sensitivity of about 3×10 -18 W / cm 2 ;

[0006] (2) Low spatial resolution: After the ICCD is amplified by the MCP (micro channel plate, that is, the intensifier), in order to ensure high gain, the resolution of the high-resolution image from the cathode is reduced, and the ICCD technology needs to read the output through the CCD , so the resolution is reduced; usually the spatial resolution of UV ICCD is 15lp / mm, and when the gain is large, the resolution is extremely low;

[0007] (3) Low temporal resolution: limited by the output of the CCD, the output speed of the ICCD device is limited due to problems such as the photoelectric conversion of the CCD and the reading circuit; due to the limitation of the CCD by image sensing, the temporal resolution Usually 33ms;

[0008] (4) Signal processing is difficult: Since the output of ICCD is two-dimensional grayscale data, the data volume is large, and each frame of data of one million bytes can be processed once, and the subsequent information processing terminal processes the data output by ICCD At the same time, it is necessary to analyze the image to extract relevant information, the algorithm complexity is high, and the real-time performance is poor;

[0009] (5) Large volume: UV ICCD is composed of UV image intensifier, relay optical system and visible light imaging system, and the sensor is bulky after being packaged as a whole.

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