CN109443534A - Day blind ultraviolet type detector and day blind ultraviolet type detection system - Google Patents
Day blind ultraviolet type detector and day blind ultraviolet type detection system Download PDFInfo
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- CN109443534A CN109443534A CN201811613455.5A CN201811613455A CN109443534A CN 109443534 A CN109443534 A CN 109443534A CN 201811613455 A CN201811613455 A CN 201811613455A CN 109443534 A CN109443534 A CN 109443534A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/429—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to measurement of ultraviolet light
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Abstract
The invention discloses day blind ultraviolet type detectors and day blind ultraviolet type detection system, are related to photodetection field.Blind ultraviolet type detector includes shell within this day, further include successively interval setting and with the photocathode of cage connection, microchannel board group and multichannel anode, there is vacuum chamber, microchannel board group includes at least two pieces microchannel plates being set in vacuum chamber in shell；Photocathode, microchannel plate and anode are equipped with electric connection terminal, and the electric connection terminal other end passes through shell, for connecting with external power supply；There are several electronic receipt areas on anode；Anode is additionally provided with the pin being electrically connected with electronic receipt area, and pin is used to connect with external analog-digital converter；This day blind ultraviolet type detection system includes blind ultraviolet type detector of above-mentioned day, further includes ultraviolet light acquisition module, analog-digital converter and the information processing terminal.The present invention has the advantages that high sensitivity, spatial resolution are high, temporal resolution is high and are conducive to signal processing.
Description
Technical field
The present invention relates to opto-electronic device and photodetection field more particularly to a kind of blind ultraviolet type detector of day and day are blind
Ultraviolet type detection system.
Background technique
Day blind ultraviolet band is wave band of the wavelength in 204nm~280nm, and in this wave band, sunlight is to pass through the earth big
By the strong absorption of ozone layer during gas-bearing formation, ground basically can not be reached, so, aerial one is arrived at the earth's surface
Determine in altitude range, is generally not present ultraviolet band.And in practical experience of life, there are the feelings for issuing ultraviolet light under some occasions
During shape, such as guided missile, aircraft, ship and vehicle etc. are run, since flame radiation, electric arc reflection itself can be generated
And ultraviolet beacon etc. can acquire source, or when object is equipped with ultraviolet source, can be realized by detector to such purple
Outer light carries out accurately detecting, it will be able to realize the accurate positioning to signal source and constantly track.
Currently, the technology with day blind ultraviolet waves acquisition function is mainly ultraviolet ICCD (day blind ultraviolet enhancement charge coupling
Clutch part) and two kinds of solid-state area array sensor.Wherein, solid-state area array sensor is since image-forming range is close, technique is unstable, space-time
The problems such as resolution ratio is low, is unable to reach application level, is also in the technology stage of fumbling；Ultraviolet ICCD technology is in military project or work
Industry field is applied, technical maturity.
But the existing ultraviolet ICCD device for detecting solar blind UV has the following deficiencies:
(1) system sensitivity is low: in order to reach imaging purpose, sensor needs to carry out multiple conversions to information (at least to pass through
The conversion of booster, relay element (relaying coupling assembly) and CCD is crossed, and can be two kinds by fluorescent screen and relay optical system etc.
The processing of the above medium), cause signal availability low (about 1%), sensitivity is about 3 × 10-18W/cm2；
(2) spatial resolution is low: after being amplified due to ICCD by MCP (microchannel plate, i.e. booster), in order to guarantee high increasing
Benefit, the high-definition picture resolution ratio from cathode reduce, and need to read by CCD in ICCD technology and export, therefore differentiate
Rate reduces；The spatial resolution of usual ultraviolet ICCD is 15lp/mm, and when gain is larger, resolution ratio is extremely low；
(3) temporal resolution is low: being limited to the output of CCD, the problems such as due to the photoelectric conversion of CCD, reading circuit, causes
The output speed of ICCD device is limited；Since CCD is limited to the limitation of image sensing, temporal resolution is usually 33ms；
(4) signal processing is difficult: since ICCD output is two dimensional gray data, data volume is big, often collects a frame million
The data of byte just can be carried out single treatment and also need when the subsequent information processing terminal handles the ICCD data exported
Relevant information is extracted, algorithm complexity is high, and real-time is poor by analyzing image；
(5) volume is big: ultraviolet ICCD due to ultraviolet imaging enhancer, relay optical system and Visible imaging system form,
Volume is larger after sensor overall package.
Summary of the invention
For overcome the deficiencies in the prior art, one of the objects of the present invention is to provide a kind of blind ultraviolet type detector of day,
Blind ultraviolet type detector sensitivity, spatial resolution, temporal resolution are all higher within this day, and follow-up signal processing simple day is blind
Ultraviolet type detector.
The second object of the present invention is to provide a kind of day blind ultraviolet type detection system, the system sensitivity, spatial discrimination
Rate, temporal resolution are all higher, and signal processing is simple.
An object of the present invention adopts the following technical scheme that realization:
Day blind ultraviolet type detector, including shell, further include successively interval setting and with the photocathode of the cage connection,
Microchannel board group and anode, the shell is interior to have vacuum chamber, and the microchannel board group includes at least two pieces and is set to the vacuum
Intracavitary microchannel plate；
The photocathode, the microchannel plate and the anode are equipped with electric connection terminal, and the electric connection terminal is another
End is across the shell, for connecting with external power supply；
The photocathode is for receiving solar blind UV and generating photoelectron；The microchannel plate is for receiving photoelectron simultaneously
Generate proliferation photoelectron；There are several electronic receipt areas, the electronic receipt area is for receiving by described micro- on the anode
The photoelectron that channel plate issues；The anode is additionally provided with the pin being electrically connected with electronic receipt area, and the pin is used for and outside
Analog-digital converter connection.
Further, the anode includes dielectric base, metal chrome plating and the pin, the metal chrome plating and institute
It states dielectric base to connect, for closing the vacuum chamber, the metal chrome plating is set for the dielectric base and the cage connection
In in the vacuum chamber, the metal chrome plating is equipped with equally distributed electronic receipt area.
It further, further include light-transmitting plate, the light-transmitting plate is with the cage connection and for closing the vacuum chamber, institute
It states light-transmitting plate and is equipped with the photocathode close to the side of the vacuum chamber.
Further, the microchannel board group includes the first microchannel plate and the second microchannel plate；It further include tapped electricity
Source, the tapped power supply include multiple taps, and have voltage difference between each tap, the photocathode, described
The two sides of first microchannel plate, the two sides of second microchannel plate and the anode pass through respectively the electric connection terminal with not
Same tap connection generates the electric field that the time extreme direction is directed toward by the anode in the vacuum chamber.
Further, micro- logical with the potential difference of 10V, described first between the photocathode and first microchannel plate
With the potential difference of 100V between guidance tape and second microchannel plate, have between second microchannel plate and the anode
The potential difference of 50V.
Further, the photocathode includes anti-reflecting layer and excitation layer；The excitation layer is close to the microchannel board group
Setting.
Further, the anti-reflecting layer is SiO anti-reflecting layer, and the excitation layer includes the AlGaAs buffering set gradually
Layer, GaAs active layer and CsO washcoat, the CsO washcoat are arranged close to the microchannel plate.
It further, further include set on the compensating electrode between the microchannel board group and the anode, the compensation electricity
Extremely annular electrode, the compensating electrode are used to be electrically connected with external analog-digital converter；The inner wall of the compensating electrode has
Receiving plane is compensated, the compensation receiving plane is for receiving photoelectron.
Further, the compensating electrode and the microchannel plate, the anode are coaxially disposed, the compensating electrode it is interior
Diameter is greater than or equal to the diameter of the microchannel plate.
The second object of the present invention adopts the following technical scheme that realization:
Day blind ultraviolet type detection system, the day blind ultraviolet type detector including above scheme, further includes ultraviolet light collection mould
Block, analog-digital converter and the information processing terminal；The ultraviolet light acquisition module is for receiving ultraviolet light and being projeced into ultraviolet light
The day blind ultraviolet type detector, if the day blind ultraviolet type detector is used to for optical signal being converted to main line analog signal and will
Analog signal is transmitted to the analog-digital converter by pin, and the analog-digital converter is for converting analog signals into digital signal
And by conversion value afferent message processing terminal；The information processing terminal is based on receiving the conversion value and analyzing it
It calculates to realize the positioning analysis to signal source.
Compared with prior art, the beneficial effects of the present invention are:
(1) sensitivity improves: due to being acquired to solar blind UV source in the conversion process for simplifying photosignal
It when with processing, has directly converted optical signals into electric signal and has been exported, only two sides are converted, and need not move through multiple conversions or more
A component conversion, greatly low to improve detectivity, sensitivity can reach single photon detection level, the spy relative to ICCD
2 orders of magnitude are improved for survey level；
(2) spatial resolution improves: the smaller setting by anode construction, is conducive to export continuous type analog signal, no
It is limited to image sensing, is conducive to improve spatial resolution；Since detector can be to single photon image, the spatial discrimination of system
Rate can reach about 300lp/mm (conversion result), and high-gain is smaller on spatial resolution influence；
(3) temporal resolution improves: sensor (anode) acquires structure (several electronic receipt areas and pin) simply, favorably
It is read in circuit, can reach higher temporal resolution；If sensing anode output is main line analog signal, signal is continuous, makes
In, usual frequency acquisition is 105Fps, i.e. temporal resolution reach 0.01ms；
(4) be conducive to later period signal processing: there was only several electronic receipt areas (n channel data) using every frame, pass through
Simple computation is convertible into 1 coordinate points, the processing done when reading can be carried out when data processing, without single
Mass data processing, therefore algorithm is simple, real-time is high；Sensing anode signal is analog signal, is converted, will be converted by ADC
It is worth incoming computer system, carries out simple numerical value calculating, available information can be obtained, compared with image procossing, to signal acquisition
System, the requirement of computer system are low；
(5) detector small volume is not necessarily to relay optical system and Visible imaging system for ICCD.
Detailed description of the invention
Fig. 1 is the overall structure diagram of day blind ultraviolet type detector of the invention；
Fig. 2 is the A-A sectional view of day blind ultraviolet type detector of the invention；
Fig. 3 is the portion the B enlarged drawing of Fig. 2；
Fig. 4 is another diagrammatic cross-section of day blind ultraviolet type detector of the invention；
In figure: 10, shell；101, vacuum chamber；20, photocathode；30, microchannel board group；31, the first microchannel plate；32,
Two microchannel plates；40, anode；41, electronic receipt area；42, dielectric base；43, pin；50, compensating electrode；51, compensation receives
Face；60, electric connection terminal.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
As shown in Figs 1-4, a kind of day blind ultraviolet type detector is present embodiments provided, the photodetector is for receiving day
Blind UV, and for solar blind UV to be carried out photoelectric conversion and carries out the amplification of signal, the photoelectron after conversion by with
If continuous analog signal in main line exports.
Specifically, which includes shell 10, has vacuum chamber 101 in shell 10, further includes successively being spaced to set
Photocathode 20, microchannel board group 30 and the multichannel anode 40 set and connect with shell 10, microchannel board group 30 include at least two
Block is set to the microchannel plate (MCP plate) in vacuum chamber 101；Photocathode 20 is used to receive solar blind UV and generates photoelectric effect,
Emit photoelectron toward vacuum chamber 101；Photocathode 20, microchannel plate and anode 40 are equipped with electric connection terminal 60, electric connection terminal
60 other ends pass through shell 10, for connecting with external power supply, between photocathode 20 and microchannel plate, adjacent microchannel plate
Between, between microchannel plate and anode 40 generate potential difference, enable photoelectron under the action of electric field from photocathode 20 toward
The direction of anode 40 moves；Microchannel plate is for receiving photoelectron and generating proliferation photoelectron, to play amplification enhancing signal
Effect；There are several mutually independent electronic receipt areas 41, electronic receipt area 41 is for receiving by microchannel plate on anode 40
The photoelectron of sending is beaten in electronic receipt area 41 from the photoelectron that microchannel plate is moved toward anode 40 with certain distribution character；
Anode 40 is additionally provided with the pin 43 being electrically connected with electronic receipt area 41, and pin 43 is used for external analog-digital converter (ADC) even
It connects.Wherein, shell 10 is ceramic shell 10.
Specifically, it is realized converting photons by photocathode 20 at photoelectron, by setting microchannel board group 30 to realize
Photoelectronic proliferation, realizes the amplification enhancing of photosignal, while mutually independent electronic receipt area is arranged by anode 40
41, and can directly be received anode 40 by setting pin 43 in order to which electronic receipt area 41 to be connect with external ADC
Continuous analog signal be directly transferred to external ADC.Detector in the present embodiment has the advantage that (1) sensitivity mentions
High (2) spatial resolution improves: new sensor is used, the electronic receipt area 41 of anode 40 is used to acquire continuous analog signal,
It may be implemented the signal acquisition of nanosecond, when use combines high-resolution ADC to export to the information processing terminal, combined data point
The algorithm of analysis needs to carry out the conversion of image information relative to ICCD, can achieve higher spatial resolution；(2) time point
Resolution improves: new sensor (anode 40) acquisition structure (several electronic receipt areas 41 and pin 43) simply, is conducive to circuit
It reads, can reach higher temporal resolution；(4) be conducive to later period signal processing: there was only several electronic receipts using every frame
Area 41 (n channel data) is convertible into 1 coordinate points by simple computation, can be carried out when data processing when reading
The processing done, without the processing of single mass data, therefore algorithm is simple, and real-time is high.
Preferably, as shown in Fig. 1,2,4, anode 40 includes dielectric base 42, metal chrome plating and pin 43, crome metal plating
Layer connects with dielectric base 42, and dielectric base 42 is connect for closed vacuum cavity 101 with shell 10, and metal chrome plating is set to vacuum
In chamber 101, metal chrome plating is equipped with equally distributed electronic receipt area 41.
Specifically, indium is filled between the connection gap between 40 substrate of anode and shell 10, to improve vacuum sealing effect
Fruit.
Specifically, dielectric base 42 is ceramic bases or substrate of glass, and substrate coats metal close to the side of vacuum chamber 101
Chrome plating, metal chrome plating mark a few road grooves on metal chrome plating, metal chrome plating are divided equally for receiving photoelectron
For multiple electronic receipt areas 41, each electronic receipt area 41 is a data acquisition channel, as shown in figure 4, the present embodiment has
Four electronic receipt areas 41.
Preferably, which has entrance window, and entrance window is equipped with light-transmitting plate, and light-transmitting plate connect with shell 10 and for sealing
Vacuum chamber 101 is closed, light-transmitting plate is equipped with photocathode 20 close to the side of vacuum chamber 101；Light-transmitting plate is glass plate.
Specifically, indium is filled between 10 connection gap of light-transmitting plate and shell, to improve vacuum sealing effect.
Preferably, in order to enable photocathode 20 and microchannel plate, between adjacent microchannel plate, microchannel plate and anode 40 it
Between generate potential difference, in favor of photoelectronic movement, microchannel board group 30 includes the first microchannel plate 31 and the second microchannel plate
32；The detection device further includes tapped power supply, which is multi-tap formula high voltage power supply, which has
At least six tap has voltage difference between each tap；It is connected to the electrical connection of the CsO washcoat of photocathode 20
Terminal 60 connect with first tap, and connect with negative pressure, to be conducive to photoelectronic spilling；First microchannel plate 31 is close
The side of photocathode 20 is connected separately with electric connection terminal 60 close to the side of the second microchannel plate 32, and the two are electrically connected
Terminal 60 is connect with two taps respectively so that between photocathode 20 and the first microchannel plate 31,31 two sides of the first microchannel plate
Pressure difference is generated, photoelectronic movement is conducive to；Similarly, 32 two sides of the second microchannel plate also respectively by electric connection terminal 60 with
Two tap connections；Anode 40 is connect by electric connection terminal 60 with tap；By above-mentioned connection, so that in vacuum chamber 101,
The electric field for being directed toward 20 direction of photocathode by the anode 40 is generated, is conducive to photoelectron under the action of electric field by photocathode
20 move to anode 40, are conducive to complete the amplification of signal and the output of signal.
Specifically, as shown in figure 4, the channel slopes of the first microchannel plate 31 and the second microchannel plate 32 are contrary sets
It sets, is conducive to the influence for eliminating the micro-displacement that channel generates photoelectron.
Photocathode 20 is used to connect with the cathode of the first external power supply；First microchannel plate 31 is close to the one of photocathode 20
It holds for connecting with the cathode of the anode of the first external power supply, external second source, the first microchannel plate 31 close to second
One end of microchannel plate 32 is used to connect with the cathode of the anode of external second source, external third power supply；Second is micro- logical
Guidance tape 32 is used to connect with the anode of external third power supply close to one end of the first microchannel plate 31, the 4th external power supply
Cathode connects, and the second microchannel plate 32 is used for and the anode of the 4th external power supply, the external the 5th close to one end of anode 40
The cathode of power supply connects；Anode 40 is used to connect with the anode of the 5th external power supply.The amplification of first piece and second block MCP plate
Multiple is all 103 times, comprehensive magnification multiple is 106 times, amplification factor when subsequent superposition.
Preferably, in the present embodiment, with the potential difference of 10V between photocathode 20 and the first microchannel plate 31, first is micro-
With the potential difference of 100V between channel plate 31 and the second microchannel plate 32, have between the second microchannel plate 32 and anode 40
The potential difference of 50V.
Preferably, photocathode 20 includes anti-reflecting layer and excitation layer；Excitation layer is arranged close to microchannel board group 30；Antireflection
Being provided with for layer is conducive to for ultraviolet photon being absorbed into excitation layer, and excitation layer is conducive to receive ultraviolet photon stimulated radiation generation photoelectricity
Son is to vacuum chamber 101.
Preferably, anti-reflecting layer is SiO anti-reflecting layer, and excitation layer includes the AlGaAs buffer layer set gradually, GaAs work
Property layer, CsO washcoat, C washcoat close to microchannel plate be arranged；Wherein, AlGaAs buffer layer, GaAs active layer are used to incite somebody to action
Ultraviolet photon is converted into photoelectron, and being provided with for CsO washcoat is spilled over to vacuum chamber 101 conducive to photoelectron；By above-mentioned each
Being superposed for layer, may be implemented ultraviolet photon (including part other signals) being converted into electronics.
Preferably, as shown in figure 4, in order to collect the photoelectron dropped down onto 40 electronic receipt area 41 of anode not successfully, to mention
The precision of high detection system, the detector further include set on the compensating electrode 50 between microchannel board group 30 and anode 40, compensation
Electrode 50 is annular electrode, and the inner wall of compensating electrode 50 has compensation receiving plane 51, and compensation receiving plane 51 is for receiving photoelectron；
Compensating electrode 50 is used to be electrically connected to external ADC in the electron-transport for receiving compensating electrode 50 to ADC, compensation electricity
Pole 50, which is not necessarily to connect with external power supply to will be moved to electric field boundary and drop down onto the photoelectron of anode 40 not successfully, to be attracted and drops down onto
Compensate receiving plane 51.
Preferably, receive for the ease of collecting compensating electrode 50 and drop down onto the photoelectron of anode 40 not successfully, with microchannel plate,
Anode 40 is coaxially disposed, and the internal diameter of compensating electrode 50 is greater than or equal to the diameter of institute's microchannel plate, collects light convenient for playing compensation
Electronics and do not influence anode 40 normally collect electronics.
The present embodiment additionally provides a kind of day blind ultraviolet type detection system, the blind ultraviolet type detection of the day including above scheme
Device further includes ultraviolet light acquisition module, analog-digital converter and the information processing terminal；Day blind ultraviolet type detector by pin 43 with
Analog-digital converter electrical connection, analog-digital converter are electrically connected with the information processing terminal；Ultraviolet light acquisition module is for receiving ultraviolet light
And ultraviolet light is projeced into day blind ultraviolet type detector, if day blind ultraviolet type detector is used to for optical signal to be converted to main line simulation
Analog signal is simultaneously transmitted to analog-digital converter by pin 43 by signal, and analog-digital converter is for converting analog signals into digital letter
Number and by conversion value afferent message processing terminal；The information processing terminal is for receiving conversion value and analyzing it calculating with reality
Now to the positioning analysis of signal source.
Specifically, the concrete model of analog-digital converter, calculation method those skilled in the art of the information processing terminal can be with
It is determined according to actual conditions selection；This system passes through the cooperation of ultraviolet light acquisition module, analog-digital converter and the information processing terminal,
The positioning analysis to object preferably can be completed using solar blind UV, and the system has high sensitivity, spatial discrimination
The advantages of rate is high, temporal resolution is high, signal analysis and processing strong real-time can realize analysis processing by simple algorithm.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (10)
1. day blind ultraviolet type detector, it is characterised in that:
Including shell, further include successively interval setting and with the photocathode of the cage connection, microchannel board group and anode, it is described
There is vacuum chamber, the microchannel board group includes at least two pieces microchannel plates being set in the vacuum chamber in shell；
The photocathode, the microchannel plate and the anode are equipped with electric connection terminal, and the electric connection terminal other end is worn
The shell is crossed, for connecting with external power supply；
The photocathode is for receiving solar blind UV and generating photoelectron；The microchannel plate is for receiving photoelectron and generating
It is proliferated photoelectron；There are several electronic receipt areas, the electronic receipt area is for receiving by the microchannel on the anode
The photoelectron that plate issues；The anode is additionally provided with the pin being electrically connected with electronic receipt area, and the pin is used for and external mould
Number converter connection.
2. day blind ultraviolet type detector as described in claim 1, it is characterised in that:
The anode includes dielectric base, metal chrome plating and the pin, the metal chrome plating and the dielectric base phase
It connects, the dielectric base and the cage connection are for closing the vacuum chamber, and the metal chrome plating is set on the vacuum chamber
Interior, the metal chrome plating is equipped with equally distributed several electronic receipt areas.
3. day blind ultraviolet type detector as described in claim 1, it is characterised in that:
It further include light-transmitting plate, for the light-transmitting plate with the cage connection and for closing the vacuum chamber, the light-transmitting plate is close
The side of the vacuum chamber is equipped with the photocathode.
4. day blind ultraviolet type detector as described in claim 1, it is characterised in that:
The microchannel board group includes the first microchannel plate and the second microchannel plate；It further include tapped power supply, it is described tapped
Power supply includes multiple taps, and has voltage difference between each tap, the photocathode, first microchannel plate
Two sides, the two sides of second microchannel plate and the anode are connected by the electric connection terminal from the different taps respectively
It connects, in the vacuum chamber, generates the electric field for being directed toward the time extreme direction by the anode.
5. day blind ultraviolet type detector as claimed in claim 4, it is characterised in that:
With the potential difference of 10V, first microchannel plate and described the between the photocathode and first microchannel plate
With the potential difference of 100V between two microchannel plates, with the potential difference of 50V between second microchannel plate and the anode.
6. day blind ultraviolet type detector as described in any one in claim 1-5, it is characterised in that:
The photocathode includes anti-reflecting layer and excitation layer；The excitation layer is arranged close to the microchannel board group.
7. day blind ultraviolet type detector as claimed in claim 6, it is characterised in that:
The anti-reflecting layer is SiO anti-reflecting layer, and the excitation layer includes the AlGaAs buffer layer set gradually, GaAs active layer
With CsO washcoat, the CsO washcoat is arranged close to the microchannel plate.
8. day blind ultraviolet type detector as described in any one in claim 1-5, it is characterised in that:
It further include set on the compensating electrode between the microchannel board group and the anode, the compensating electrode is annular electrode,
The compensating electrode is used to be electrically connected with external analog-digital converter；The inner wall of the compensating electrode has compensation receiving plane, institute
Compensation receiving plane is stated for receiving photoelectron.
9. day blind ultraviolet type detector as claimed in claim 8, it is characterised in that:
The compensating electrode and the microchannel plate, the anode are coaxially disposed, and the internal diameter of the compensating electrode is greater than or equal to
The diameter of the microchannel plate.
10. day blind ultraviolet type detection system, including such as claim 1-9 described in any item days blind ultraviolet type detector, spy
Sign is:
It further include ultraviolet light acquisition module, analog-digital converter and the information processing terminal；
The ultraviolet light acquisition module is described for receiving ultraviolet light and ultraviolet light being projeced into the day blind ultraviolet type detector
If a day blind ultraviolet type detector is used to for optical signal being converted to main line analog signal and is transmitted to by pin analog signal described
Analog-digital converter, the analog-digital converter is for converting analog signals into digital signal and handling conversion value afferent message eventually
End；The information processing terminal is used to receive the conversion value and analyzes it and calculates to realize the positioning point to signal source
Analysis.
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| CN112484849A (en) * | 2020-11-23 | 2021-03-12 | 北京卫星环境工程研究所 | Integrated space far ultraviolet radiation detector and quantum efficiency test system thereof |
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