CN101358878B - Transient ultraviolet multi-spectrum radiacmeter - Google Patents
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Abstract
The invention discloses a transient ultraviolet multispectral radiometer, comprising a plug-pull type aiming lens, a guide rail component, a cassegrain imaging system, an ultraviolet spectrograph, a CCD driving circuit, a high-speed collection storage system and a computer which is provided with a spectrum measure data processing soft package. The cassegrain imaging system aims at a light source to be detected with the help of the aiming lens, adjusts self-focal distance and makes the light source to be detected for imaging clearly on the incidence slit of the ultraviolet spectrograph; the output optical signal of the ultraviolet spectrograph is converted to an electrical signal through the CCD driving circuit and is collected and stored by the high-speed system, and then is transmitted to the computer by a USB line. The spectrum measure data processing soft package calculates the spectrum power curve, the peak value wavelength, the corresponding power value of the light source to be detected according to relevant calculation means. The invention not only can detect the ultraviolet spectrum of the microsecond transient line light source and the transient side light source during single flashing time, but also can detect the ultraviolet spectrum of the steady state radiation light source including weak energy or the far radiation light source, and has good application prospect.
Description
Technical field
The invention belongs to transient state spectrum test instrument field, relate generally to a kind of transient state ultraviolet spectrometer (UVS), relate in particular to a kind of transient ultraviolet multi-spectrum radiacmeter that can accurately measure the diffused light ultraviolet spectrum of transient test area source and line source based on the photoelectric camera spectrometry.
Background technology
In recent years, along with the Application and Development of high precision ultraviolet detector array, begun the development of transient state ultraviolet spectrum testing tool both at home and abroad.Meanwhile, the new high-tech industry of China is more and more to the demand of transient state light source ultraviolet spectrum test.Transient state ultraviolet spectrum tester can be applicable to new material development, Plane Tail Fire Based survey, to uvioresistant guidance, ultraviolet alarm, mineral identification, space remote sensing is surveyed and field such as medical research.In in new material research, the material composition of the mutation analysis material by measuring ultraviolet spectrum.In the development of aircraft engine, need the ultraviolet characteristic spectrum of survey aircraft wake flame.
At present, transient state ultraviolet spectrum tester all adopts the photoelectric camera spectrometry to measure in the world, and development trend is the multispectral instrument of transient state ultraviolet.In the world, measurement conducts a research at transient state light source ultraviolet spectrum is represented as Dutch Avantes company.Avaspec-2048 * 14 type fiber spectrometer tested objects that the said firm produces are line source, measuring speed is 2ms, wavelength resolution 2nm, adopt high ultraviolet sensitivity CCD area array sensor, comprise fibre-optical splice, collimating mirror, focus lamp and diffraction grating, dispose 16 A/D transition cards and high speed USB 2.0 interfaces.Because optical fiber is low to the transmitance of ultraviolet light, therefore, this spectrometer is the remote ultraviolet source of energy measurement not.Do not see at present the report of the transient state ultraviolet spectrometer (UVS) that can measure microsecond level area source.
Transient state spectrum test instrument was from 1988 at home, exclusively develop by No.205 Inst., Chinese Ordnance Industries always, the transient spectroradiometer of its invention obtained China Patent Right in 1991, and (patent No. is: ZL93102273.8), this device can be measured transient state visible, the near infrared spectrometer of flash time greater than delicate level transient state light source, and measuring wave band is (350～1100) nm.2003, Shanghai Communications University developed the ultraviolet spectrum analyzer that Measuring Time is 0.1s, and this analyser comprises deuterium lamp and tungsten light source, collimation lens, sample cell, convergent lens and the beam splitting system that contains slit, flat filed concave grating and line array CCD.Because the flat filed concave grating in this analyser is being to form ultraviolet spectrogram on the Rowland circle, therefore, the spectral resolution of this analyser is not high.This spectroanalysis instrument becomes the feature of the analytic sample of assigning to by the ultraviolet spectrum of test sample, but the ultraviolet spectrum of energy measurement transient state light source not.
The low veiling glare monochromator that the small-sized transient state spectrometer that Anhui optical precision optical machinery Research Institute goes out comprises object lens, field lens and contains entrance slit, spherical mirror, plane grating and linear array detector, wherein, low veiling glare monochromator has obtained Chinese utility model patent (patent No. is ZL03220878.2).Be applicable to the spectrum test of (350～1100) nm, its measuring object is a line source, and spectral resolution is 2nm.This spectrometer images in entrance slit by object lens and field lens with measured light, is collimated on the plane grating through the spherical mirror reflection again, and the spectrum that forms behind the grating beam splitting is focused on the linear array detector by spherical mirror again.Because this spectrometer has adopted transmission type optical system, causes spectral energy significantly to be decayed, therefore be difficult for surveying the radiation of remote light source; In addition, carry out the collimation and the focusing of the spectrum after the beam split of incident light in the spectrometer with same spherical mirror, cause off-axis aberration big, parasitic light is many, causes adverse effect to improving spectral resolution.
In transient state light source ultraviolet spectrum is measured, not only require spectral measurement precision height, and require all can test the line source and the area source at different distance place.Because ultraviolet spectrum exists that absorbability is strong, energy is low, problem, the relevant high precision transient ultraviolet spectrometer (UVS) of measuring μ s level transient state area source of also open at present report such as be difficult for being detected both at home and abroad.
Summary of the invention
The technical problem to be solved in the present invention is that at the deficiencies in the prior art, it is transient ultraviolet multi-spectrum radiacmeter that a kind of intelligent ultraviolet transient state spectrum test instrument is provided.
For solving the problems of the technologies described above, transient ultraviolet multi-spectrum radiacmeter traversing head of the present invention, the guide assembly that contains the computing machine of spectrum measuring data processing software package and be installed in main casing inside, the Cassegrain imaging system that contains primary mirror and secondary mirror, the ultraviolet spectrograph that contains ccd detector, spectroscopic imaging system and entrance slit, CCD driving circuit and high speed acquisition storage system; Described primary mirror and described guide assembly are connected, described traversing head is a plug-in, when traversing head was inserted into main casing, the optical axis coincidence of objective lens optical axis in the traversing head and described Cassegrain imaging system can be extracted from main casing behind traversing head aiming measured light; The optical radiation that measured light sends is imaged onto the entrance slit place of described ultraviolet spectrograph through the Cassegrain imaging system, again after the beam split of described spectroscopic imaging system, ultraviolet spectrum is imaged onto on the photosurface of described ccd detector, after optical signals CCD driving circuit on this photosurface converts electric signal to, store by the collection of described high speed acquisition storage system and after converting digital signal to; Described spectrum measuring data process software includes Wavelength calibration database, power calibration database, menu module, test and computing module, memory module, enquiry module, the Wavelength calibration databases has the wavelength value of each pixel correspondence of ccd detector, the power calibration database has the correction factor K (λ) of each spectroscopic data, the function of menu module is to demonstrate the multiple function selector button by display, the function of test and computing module is according to the selector button order, gathers background signal V by the USB line from the high speed acquisition storage system
0(λ), the measuring-signal V (λ) of stable light source or transient state light source, call the Wavelength calibration database and determine [V (λ)-V
0(λ)] pairing wavelength value λ
i, call the power calibration database and find out and wavelength value λ
iCorresponding correction factor K (λ
i), calculate the spectral power value of measured light, and on display, showing the spectral power curve of power with wavelength variations with wall scroll or many modes, the function of memory module is according to the selector button order curve of spectrum of the measured light that obtains in the measuring process and the wavelength value and the pairing spectral power value of each peak point of the curve of spectrum to be deposited in the measurement result database by certain form; The function of enquiry module is to access correlation spectrum curve and corresponding data thereof and show at display from the measurement result database according to the selector button order.
According to the present invention, in described ultraviolet spectrograph, beam splitter in the spectroscopic imaging system is selected the plane blazed grating for use, blaze wavelength is at ultraviolet band, described ccd detector is selected the photosensitive element array of high sensitivity ultraviolet enhancement CCD for use, and the wavelength band that is imaged onto the ultraviolet spectrum on the ccd detector photosurface is 200nm～415nm.
According to the present invention, described primary mirror is a spherical reflector, and radius is 300mm, and clear aperture is φ 146mm; Described secondary mirror is a hyperboloidal mirror, and clear aperture is φ 14.5mm.
Beneficial effect of the present invention is embodied in following five aspects.
(1) the present invention has set up the Cassegrain imaging system at the front end of ultraviolet spectrograph, by the Cassegrain imaging system spectral radiant energy of transient state light source is focused on, the emittance that enters the measured light in the ultraviolet spectrograph is significantly increased, solved the ultraviolet spectrum problems of measurement of weak light source; In addition, cooperating of the high sensitivity ultraviolet enhancement line array CCD in Cassegrain imaging system and the ultraviolet spectrograph improved the spectral resolution that intense light sources such as blast radiation source are measured.
(2) the present invention is fixed with guide assembly for the primary mirror of Cassegrain imaging system, realizes the focal length variations of Cassegrain imaging system by the moving guide rail assembly, thereby has solved the ultraviolet spectrum problems of measurement to different distance place radiation source.
(3) medium ultraviolet spectrograph of the present invention is collimated into picture by two spherical reflectors, adopts plane ultraviolet blazed grating beam split, has guaranteed the accuracy of spectral measurement.
(4) the present invention has adopted the measurement control mode that CCD driving circuit and high speed acquisition memory circuit match, and has solved the spectral measurement problem of single flash operation time at the transient state light source of microsecond level.
(5) the spectrum measuring data processing software package in the computing machine not only can be handled the measurement data of transient state light source, can also handle the measurement data of stable light source simultaneously, has improved range of application of the present invention.
Description of drawings
Fig. 1 is that the system of transient ultraviolet multi-spectrum radiacmeter of the present invention constitutes synoptic diagram.
Fig. 2 is the CCD driving circuit block scheme shown in Fig. 1.
Fig. 3 is that the high speed acquisition storage system shown in Fig. 1 is formed synoptic diagram.
Fig. 4 is the acquisition controlling process flow diagram of the CPLD shown in Fig. 3.
Fig. 5 is the workflow diagram of spectrum measuring data processing software package among the present invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and preferred embodiment.
As shown in Figure 1, ultraviolet spectrograph 1, Cassegrain imaging system 2, guide assembly 3, CCD driving circuit 5 and high speed acquisition storage system 6 that the transient ultraviolet multi-spectrum radiacmeter of the preferred embodiment of the present invention comprises traversing head 4, the computing machine 7 of spectrum measuring data processing software package is housed and is installed in main casing inside.Measuring principle of the present invention is, making transient ultraviolet multi-spectrum radiacmeter aiming measured light by traversing head 4 (can be line source, also can be area source) 8, regulate the focal length of Cassegrain imaging system 2 by guide assembly 3 then, make the measured light picture point that is imaged onto ultraviolet spectrograph entrance slit place reach minimum, the light source picture point is surveyed by spectrograph 1 after CCD driving circuit 5 converts electric signal to, gathered by high speed acquisition storage system 6 and be transferred to computing machine 7, the spectrum measuring data processing software package of computing machine 7 draws measurement result after measuring-signal is handled accordingly.
Referring to Fig. 1, the traversing head 4 of this preferred embodiment comprises object lens 4-1, right angle roof prism 4-2, graticule 4-3 and eyepiece 4-4.Traversing head 4 is the plug parts, and it can be installed at any time on the multi-spectrum radiacmeter main casing (not shown) of the present invention or from main casing by the plug web member on its lens barrel and disassemble.When traversing head 4 is installed to main casing, the axis of its object lens 4-1 should with the optical axis coincidence of Cassegrain imaging system 2.When the radiation of measured light 8 is imaged onto the cross center of cross-graduation plate 4-3 by object lens 4-1 and roof prism 4-2, just mean that also measured light 8 has been positioned on the optical axis of Cassegrain imaging system 2, promptly measured light 8 is equivalent to the last object point of axle of Cassegrain imaging system 2.In order to reduce radiation of light source loss, after the aiming of finishing measured light 8, traversing head 4 need be pulled up from main casing, and then be carried out the surveying work of back.The guide assembly 3 of present embodiment is made of knob, screw mandrel and slide block, and slide block is installed on the screw mandrel by its threaded hole, and knob is connected in an end of screw mandrel, and screw mandrel is connected on the main casing and knob is positioned at the main casing outside.
Referring to Fig. 1, Cassegrain imaging system 2 comprises that primary mirror 2-1, secondary mirror 2-2 constitute.Cassegrain imaging system clear aperture is φ 146mm, and minimum measuring distance is 5m, and field angle is 36 ".Primary mirror 2-1 is a spherical reflector, and radius is 300mm, and clear aperture is φ 146mm.Secondary mirror is a hyperboloidal mirror, and clear aperture is φ 14.5mm.Primary mirror 2-1 is fixed on the slide block of guide assembly 3.For receive the ultraviolet light of measured light 8 by primary mirror 2-1, reflex to then on the secondary mirror 2-2, secondary mirror 2-2 focuses on reflected light on the entrance slit 1-1 of ultraviolet spectrograph 1, has realized that the ultraviolet spectrum of weak light source is measured.At the strong characteristics of ultraviolet spectrum absorbability, present embodiment is done secondary mirror 2-2 bore less, to reduce secondary mirror 2-2 blocking measured light 8 radiation.Be coated with high reflective aluminum film on the reflecting surface of primary mirror 2-1 and secondary mirror 2-2, reflectivity reaches 95%.During measurement, can adjust the position of primary mirror 2-1 by the knob that rotates guide assembly 3, the focal length of Cassegrain imaging system 2 is changed, assurance focuses on the entrance slit 1-1 of spectrograph 1 exactly to the radiation energy of different distance place measured light 8, and this mode has solved the problem that some transient state light source such as fiery explosive can not close-in measurements.
The ultraviolet spectrograph 1 of this preferred embodiment comprises entrance slit 1-1, plane mirror 1-2, plane blazed grating 1-3, two spherical reflector 1-4 and 1-5, ccd detector 1-6.Each mirror surface is coated with the highly reflecting films at ultraviolet band.Entrance slit 1-1 adopts field stop, and maximum slit width is φ 15 * 3mm, and the visual field is 36 ".The clear aperture of plane mirror 1-2 is 20 * 20mm, and two spherical reflector 1-4 and 1-5 are identical, and its radius is 413.0mm, and clear aperture is 64 * 40mm.The clear aperture of blazed grating 1-3 is φ 35mm, and blaze wavelength is 300nm, groove 600L/mm, and the spectrum length that forms after the chromatic dispersion is 24mm, reflective coating reflectivity ρ 〉=94%.The blaze wavelength of plane blazed grating 1-3 is at ultraviolet band.In order to observe the imaging situation of Cassegrain imaging system 2, the main body cover of multi-spectrum radiacmeter of the present invention is provided with view window, and this view window is positioned at the entrance slit 1-1 place of ultraviolet spectrograph 1.After pulling up traversing head 4, the tester observes the picture point that is imaged onto entrance slit 1-1 place by Cassegrain imaging system 2 by this view window and whether reaches minimum, if not, the focal length of instruction card Cassegrain imaging system 2 and the object distance of measured light 8 do not match, will regulate by guide assembly 3 so, clearly become till entrance slit 1-1 place until the picture of Cassegrain imaging system 2 with measured light 8.The measured light picture point at entrance slit 1-1 place is after plane mirror 1-2 reflection, be collimated into directional light by the first spherical reflector 1-4, become a branch of straight spectrum line by blazed grating 1-3 beam split then, the ultraviolet spectrum of 200～415nm in the spectrum line is imaged on exactly on the photosurface of ccd detector 1-6 through the second spherical reflector 1-5 again, compare with the flat filed concave grating that in the prior art spectrum line is imaged onto the rowland garden, improved the accuracy of light spectrum image-forming.Ccd detector 1-6 selects the photosensitive element array of high sensitivity ultraviolet enhancement line array CCD for use, and its pixel number is 1024, and pixel dimension is 25 μ m, and photosensitive element array length overall is 25.6mm, and dark current is 0.1pA.Enhancement mode ultraviolet ccd detector can improve the resolution of intense light source spectral measurement.
According to shown in Figure 2, CCD driving circuit 5 comprises that pulse producer, pulse driver, traffic filter, current amplifier and electric current change voltage amplifier and voltage comparator.The pulse signal that pulse driver produces pulse producer under CPLD triggers offers ccd detector with the multichannel form, it is that the integrated pulse of 64ms is given CPLD that ccd detector is exported one road integration period, also exports one tunnel CCD voltage signal corresponding with the integrated pulse cycle simultaneously.The CCD voltage signal changes voltage amplifier by electric current again and is converted to magnitude of voltage and amplification after traffic filter filtering and current amplifier amplification, and divide two-way output then: the one tunnel is transported to the voltage comparator of its supervisory function bit, and A/D converter is delivered on another road.Voltage comparator judges according to the size of input signal whether ccd detector receives light signal, and A/D converter is converted to digital value to the CCD voltage signal.So far finish the driving of an integration period CCD voltage signal and amplify, subsequently, the CCD voltage signal continues output according to above-mentioned integration period.The CCD circuit is accumulated at the spectral energy of the transient state intense light source of microsecond level the single flash operation time in the integration period of 64ms, make ultraviolet enhancement ccd detector response back output current, realized thus the light source measurement of single flash operation time in the microsecond level.
According to shown in Figure 3, high speed acquisition storage system 6 comprises master controller CPLD, A/D converter, random access memory and USB controller.The function of CPLD is the order that receiving computer 7 sends, and by control flow shown in Figure 4 whole test process is controlled.When the transient state light source is tested, CPLD is after receiving computer commands, start the A/D converter collection also produces 8K by its inner address generator in the random access memory of 1M circulation address, the startup random access memory in the 8K space to the sampled signal storage that circulates; During this period, CPLD also produces and interrupts the sampling clock of sampled signal as A/D converter, and with the sampling time sequence of control A/D converter, and then assurance is to the consistance of each pixel sampling time point of CCD in each frame signal.When CPLD judges that the voltage comparator output level is high level, think that flash of light arrives, CPLD notes the current storage address, behind the data space of the intact 8K of cycle index.Change the memory cycle memory module into the sequential storage pattern, make the simulating signal of CCD driving circuit 5 outputs be converted to digital signal through A/D converter, the space addressing of address generator in the CPLD beyond storer 8K, and store all measurement data in order, the record flash of light is up to end.When signal was low level in the one-period, CPLD control A/D stopped data collection, and thought that flash of light finishes, and gave USB controller with power control data, and the USB controller transfers data to computing machine 7, finishes the transient state optical tests.The test process of the test process of stable light source and transient state light source is basic identical, just judges without voltage comparator, after Direct Sampling, the storage, is transferred to computing machine 7 and gets final product.
Pentium4 and above serial CPU are housed in the computing machine 7, the above internal memory of 64M, Windows98 and above operating system thereof contain the spectrum measuring data processing software package of Wavelength calibration database, power calibration database, menu module, test and computing module, memory module, enquiry module.The Wavelength calibration databases has the wavelength value of each pixel correspondence of ccd detector.The power calibration database has the correction factor K (λ) of each spectroscopic data.The function of menu module is to show the multiple function selector button by display on homepage, i.e. one group of test-types selector button, comprise " background test ", " stable light source test ", " transient state test of light source ", wherein, " single spectrum collection " and " multispectral collection " button is all arranged again under " stable light source test " and " transient state test of light source " selector button; " calculating " button; One group of data management button comprises " preservation data " " data query ".The function of test and computing module is: order is sent test command to the USB controller according to the test-types selector button, and gathers the measuring-signal V (λ) of background signal V0 (λ), stable light source or the transient state light source of the output of USB controller, calculates V (λ)-V
0(λ) and call the Wavelength calibration database root and determine each [V (λ)-V according to the wavelength value of each pixel correspondence of CCD
0(λ)] pairing wavelength value λ
i, make corrected signal corresponding one by one with wavelength; Call the power calibration database and find out and wavelength value λ according to " calculating " button command
iCorresponding correction factor K (λ
i), to select for use under " single spectrum collection " button situation, the test curve of being gathered is one, so λ
iAnd corresponding correction factor K (λ
i) all have only a value, and selecting for use under " multispectral collection " button situation, the test curve of being gathered is many, concrete quantity is decided according to the flash time of measured light, can obtain 120 test curves at most, so λ
iQuantity and corresponding correction factor K (λ
i) quantity corresponding with the quantity of test curve; Utilize formula S (λ)=K (λ
i) * [V (λ)-V
0(λ)] calculate the spectral power value of measured light, test curve is modified to power with the spectral power curve of wavelength variations and showing (under multispectral acquisition condition, many spectral power curves are with Pagination Display) on the page thereupon; Click each peak point in certain bar spectral power curve, can provide the wavelength value and the corresponding relative power value thereof of this peak value, this preferred embodiment can only be clicked 14 peak points at most; By printing device output spectrum powertrace and peak value and wavelength value.The workflow of test and computing module is referring to Fig. 4.The function of memory module is according to " preservation data " button command the curve of spectrum of the measured light that obtains in the measuring process and the wavelength value and the corresponding spectral power value at each peak value place of the curve of spectrum to be deposited in the measurement result database by certain form.The function of enquiry module is the search field according to the input of " data query " button command and keyboard, accesses correlation spectrum curve and corresponding data thereof and shown from the measurement result database.The workflow of spectrum measuring data processing software package is referring to Fig. 5.
The software operation of transient ultraviolet multi-spectrum radiacmeter of the present invention and test process are: open instrument power source, with the USB line instrument is connected with computing machine, after the instrument preheating 10 minutes, start computing machine 7, on homepage, select " background test " button, in the darkroom or simulate the testing ground testing background noise V in darkroom
0(λ).Accurately again it is removed behind the aiming measured light 8 with traversing head 4.Cassegrain imaging system 2 is assembled spectral radiant energy, according to 3 focusing of light source distance moving guide rail assembly, makes the energy of the measured light 8 that enters in the ultraviolet spectrograph 1 reach maximum.On the homepage of computing machine 7, select " stable light source " or " transient state light source " button according to measuring object, and then selection " single spectrum collection " or " multispectral collection " button, can gather the test curve of measured light 8 by the high speed acquisition storage system, click " calculating " button on the homepage again, the display page of computing machine 7 can demonstrate and the corresponding spectral power curve of test curve, click each peak point in the curve of spectrum, can show the wavelength value and the performance number of each peak point and click " preservation data " button and preserve at this page.
Need demarcate when transient ultraviolet multi-spectrum radiacmeter of the present invention dispatches from the factory, its calibration process is: adorn calibration software in computing machine 7.After the start, import password by the homepage of computing machine and enter the Wavelength calibration window, then traversing head 4 accurately after the aiming low pressure mercury lamp collimating apparatuss is removed it.Cassegrain imaging system 2 converges spectral radiant energy, according to 3 focusing of light source distance moving guide rail assembly, makes radiation of light source enter the energy maximum of spectrograph 1.Click the test selector button of computing machine 7 homepages, after the test, click three crests on the spectral power curve, click the Wavelength calibration software push buttons again, computing machine 7 just moves calibration software automatically, thereby determine 253.7nm, the 365.0nm of mercury lamp, the pixel position that the 404.7nm wavelength value responds on CCD, with calculating each wavelength value responds in the wavelength coverage pixel position and be input to automatically in the nominal data storehouse in the spectrum measuring data processing software package on CCD, finish the Wavelength calibration of instrument of the present invention.At the software program homepage, the input password enters the energy calibration window afterwards, and traversing head 4 accurately after the aiming deuterium lamp collimating apparatus is removed it.Cassegrain imaging system 2 is assembled spectral radiant energy, according to 3 focusing of light source distance moving guide rail assembly, makes light source 8 enter the energy maximum of spectrograph 1.Click the testing button of homepage, click the energy calibration button behind the display light spectral power curve, computing machine moves calibration software automatically, and the energy calibration data are deposited in the power calibration database in the spectrum measuring data processing software package.So far finishing transient ultraviolet multi-spectrum radiacmeter of the present invention demarcates.
Test result shows that the technical indicator that transient ultraviolet multi-spectrum radiacmeter reaches is:
Wavelength coverage: (200～415) nm;
The wavelength measurement uncertainty is 1nm;
Wavelength duplicate measurements uncertainty is 0.5nm;
The spectral power uncertainty of measurement is 3%.
Instrument can accurately aim at the transient state light source, accurately measures the parameters such as wavelength, spectral power of transient state light source, but different several spectrum tests figure constantly of display light source.Measuring object is stable state ultraviolet source, transient state ultraviolet source (as stroboscopic light sources, light-pulse generator, fiery explosive and Plane Tail Fire Based), and measurable transient state light source flash time is the microsecond level.
Claims (3)
1. transient ultraviolet multi-spectrum radiacmeter, comprise computing machine [7] that contains the spectrum measuring data processing software package and the ultraviolet spectrograph [1] that is installed in main casing inside, CCD driving circuit [5] and high speed acquisition storage system [6], described ultraviolet spectrograph [1] contains ccd detector [1-6], spectroscopic imaging system and entrance slit [1-1], it is characterized in that: also comprise plug-in traversing head [4] and be installed in the interior Cassegrain imaging system [2] of main casing, guide assembly [3], described Cassegrain imaging system [2] contain primary mirror [2-1] and secondary mirror [2-2] and primary mirror [2-1] and are connected with described guide assembly [3]; When described traversing head [4] when being inserted into main casing, object lens [4-1] optical axis in the traversing head [4] and the optical axis coincidence of described Cassegrain imaging system [2], behind traversing head [4] aiming measured light [8], can extract from main casing; The optical radiation that measured light [8] sends is located through the entrance slit [1-1] that Cassegrain imaging system [2] is imaged onto described ultraviolet spectrograph [1], again after the beam split of described spectroscopic imaging system, ultraviolet spectrum is imaged onto on the photosurface of described ccd detector [1-6], after optical signals CCD driving circuit [5] on this photosurface converts electric signal to, store after gathering and convert to digital signal by described high speed acquisition storage system [6]; Described spectrum measuring data process software includes Wavelength calibration database, power calibration database, menu module, test and computing module, memory module, enquiry module, the Wavelength calibration databases has the wavelength value of each pixel correspondence of ccd detector, the power calibration database has the correction factor K (λ) of each spectroscopic data, the function of menu module is to demonstrate the multiple function selector button by display, the function of test and computing module is according to the selector button order, gathers background signal V by the USB line from high speed acquisition storage system [6]
0(λ), the measuring-signal V (λ) of stable light source or transient state light source, call the Wavelength calibration database and determine [V (λ)-V
0(λ)] pairing wavelength value λ
i, call the power calibration database and find out and wavelength value λ
iCorresponding correction factor K (λ
i), calculate the spectral power value of measured light [8], and on display, showing the spectral power curve of power with wavelength variations with wall scroll or many modes, the function of memory module is according to the selector button order curve of spectrum of the measured light [8] that obtains in the measuring process and the wavelength value and the pairing spectral power value of each peak point of the curve of spectrum to be deposited in the measurement result database by certain form; The function of enquiry module is to access correlation spectrum curve and corresponding data thereof and show at display from the measurement result database according to the selector button order.
2. transient ultraviolet multi-spectrum radiacmeter according to claim 1, it is characterized in that: in described ultraviolet spectrograph [1], beam splitter in the spectroscopic imaging system is selected plane blazed grating [1-3] for use, its blaze wavelength is at ultraviolet band, described ccd detector [1-6] is selected the photosensitive element array of high sensitivity ultraviolet enhancement CCD for use, and the wavelength band that is imaged onto the ultraviolet spectrum on ccd detector [1-6] photosurface is 200nm～415nm.
3. transient ultraviolet multi-spectrum radiacmeter according to claim 1 and 2 is characterized in that: described primary mirror [2-1] is a spherical reflector, and radius is 300mm, and clear aperture is φ 146mm; Described secondary mirror [2-2] is a hyperboloidal mirror, and clear aperture is φ 14.5mm.
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| CN109405968B (en) * | 2018-10-18 | 2020-10-30 | 中国科学院云南天文台 | Automatic spectrum observation system and control method thereof |
| CN109990897B (en) * | 2019-04-17 | 2023-12-22 | 北京理工大学珠海学院 | Laser spectrometer |
| CN111998944A (en) * | 2020-08-31 | 2020-11-27 | 中电科仪器仪表有限公司 | Multi-light-source-based precise calibration device and method for broadband spectrometer |
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