CN201045610Y - Visible light, near infrared light spectral analysis measuring instrument - Google Patents
Visible light, near infrared light spectral analysis measuring instrument Download PDFInfo
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- CN201045610Y CN201045610Y CNU2007200939655U CN200720093965U CN201045610Y CN 201045610 Y CN201045610 Y CN 201045610Y CN U2007200939655 U CNU2007200939655 U CN U2007200939655U CN 200720093965 U CN200720093965 U CN 200720093965U CN 201045610 Y CN201045610 Y CN 201045610Y
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Abstract
The utility model discloses a visible light, near-infrared spectral analysis measuring device, which comprises light source, an optical lens arranged along a light path, a chopping light device, a light filter, a grating monochromatic device, optical fiber connecting measuring components which are arranged on the output end of the light path of the grating monochromatic device, one of two pieces of the optical fiber arranged on the output end of the measuring components is connected with a coupling measuring optical fiber connecting piece, a silicon optical detector, a low-level noise preamplifier, a signal line socket, and which is connected with the preamplifier to a signal processing board signal line, the input end of a signal processing board circuit, the other piece of the optical fiber is connected with a coupling measuring optical fiber connecting piece, an InGaAs detector, a low-level noise preamplifier, a signal line socket, and which is connected with the preamplifier to a signal processing board signal line, the input end of a signal processing board, the output end of a signal processing board is connected with a data communication line and a top measuring computer. The utility model has the advantages of small size, light weight, which is not only suitable for on-line analysis, but also suitable for carrying in field and using on site and the like.
Description
Technical field
The utility model belongs to a kind of spectral analysis measuring instrument of visible light to the full spectral coverage of near infrared light of measuring and analyze, and is specifically related to a kind of visible light is composed interior online and on-the site analysis of 380nm～2500nm section spectral range entirely near infrared light spectral analysis measuring instrument.
Background technology
In recent years along with the spectral analysis technique development, near infrared spectrum 780～2500nm analysis to measure technology has entered white processing period now, but also some field still needs visible light to carry out the analysis of sample colourity and luminosity, so the full spectral coverage analysing and measuring instrument of 380nm～2500nm has a wide range of applications.The labspec pro type instrument that at present external U.S. ASD company provides is representative, its weak point is subjected to the interference of ambient light when mainly being measurement, and cost an arm and a leg, Chinese patent application number be 98124798.9 " a kind of online near infrared multicomponent measuring method and instrument " patent disclosure adopt the measuring method and the system of four wavelength double light paths, eight light beams, its shortcoming is to have only four wavelength, be not suitable for all band analysis of spectrum, the patent disclosure of the patent of " the infrared mineralogical analysis instrument of portable near " of Chinese patent application number 03127633.4 and " the portable near infrared spectrum analyser " of application number 200420025072.3 a kind of small-sized raster scan type near infrared spectrometer that is fit to carry, the problem of its existence be measuring speed slow (70 seconds) and wavelength coverage near infrared region, be not suitable for online quick measurement.Chinese patent application number for the patent disclosure of 02125852.X " online near infrared spectrometer " a kind of quick measurement of adopting linear charge-coupled array to realize spectrum as receiving element, its advantage is that instrument has Wavelength stabilized and fireballing characteristics, its shortcoming can be subjected to extraneous interference of stray light when being measurement, each pixel of detector is little, the spectral line signal to noise ratio (S/N ratio) that records is not high, and the while, prices are rather stiff at the linear charge-coupled array of near infrared spectral coverage.
Summary of the invention
The utility model provides a kind of reduces mechanical wear, sweep velocity is fast, cost performance is high, volume is little, in light weight, be fit to open-air small-sized and be easy to carry and on-the-spot visible light, the near-infrared spectral measurement instrument that carries out on-line measurement.
The utility model is realized as follows; Comprise light source, the poly-lens that are provided with along light path, optical filter, grating monochromator and be connected with optical fiber on the output terminal of its light path and measure assembly, the road optical fiber of measuring on the assembly output terminal in two optical fiber is connected with coupling measurement light (visible light～shortwave near infrared) fiber optic connector, the silicon photo-detector, low-noise preamplifier, signal wire socket, connect prime amplifier to the signal-processing board signal wire, the input end of signal-processing board, another road optical fiber is connected with coupling measurement light (near infrared) fiber optic connector, the InGaAs detector, low-noise preamplifier, signal wire socket, connect prime amplifier to the signal-processing board signal wire, the input end of signal-processing board is connected with data communication line and upper metering computer on the circuit output end of signal-processing board.
In being provided with, light source cover one side that is provided with illuminator in described light source comprises and is provided with the printing opacity mouth establishes the Instrument shell of insulating collar, the semiconductor cooling device outside of being equipped with on the side of light source cover is connected with the bell-type heat radiator, and the motor shaft that be equipped with bell-type heat radiator inboard is provided with fan.Illuminator comprises any light source in halogen tungsten lamp, mercury lamp, deuterium lamp, this special infrared light supply of energy, the laser.
The collimating mirror that described grating monochromator is provided with by light path, grating and imaging concave mirror are formed, its beam split light path comprises horizontal imaging monochromator or staggered form imaging monochromator, and horizontal imaging monochromator comprises collimation concave mirror and the imaging concave mirror that grating, right upper portion and the bottom in left side are provided with.Staggered form imaging monochromator comprises collimation concave mirror and the imaging concave mirror that grating, right upper portion and the bottom in left side are provided with, and described grating monochromator also comprises the raster scan device that light path is provided with.
Described raster scan device comprises the swivel mount that is equipped with on the spacer ring that is provided with between the bearing that is equipped with on two sections of substrate plate that direct current generator that support is provided with and photoelectric encoder, support are provided with and the motor shafts, the bearing and the motor shaft, grating frame and the grating that swivel mount is provided with, described direct current generator drives raster scanning mechanism swivel mount, by the position of encoder feedback recording wavelength scanning.
Described measurement assembly comprises reflective measurement assembly; integrating sphere diffuse reflectance measurement assembly or transmission measurement assembly; the sample protective glass that reflective measurement assembly is provided with by outrigger top; the optical fiber that left condenser lens that outrigger inside is provided with and right condenser lens and input end penetrate outrigger bottom and both sides constitutes; the sample protective glass that integrating sphere diffuse reflectance measurement assembly is provided with by integrating sphere top; the optical fiber of left condenser lens that the integrating sphere two bottom sides is provided with and right condenser lens and input end counter sample eyeglass constitutes; the deferent segment of optical fiber connects measures assembly, the sample cell that the transmission measurement assembly is provided with by peripheral structure frame inboard; the reflecting prism that the right side is provided with; the single fiber that the sample cell left side is provided with and two optical fiber constitute.
Described light source can adopt built-in light source, also can adopt external input light.Built-in light source is that the light source scioptics focus on monochromator entrance slit mouth place, outstanding light after beam split, and to sample, the light of absorption of sample reflection is coupled to the absorption reflectance spectrum that detector comes measuring samples by optical fiber again through optical fiber.External light source input comprises: 1, light is coupled to monochromator entrance slit place by optical fiber, all the other identical built-in light source light paths; 2, measured light is coupled to monochromator entrance slit place through optical fiber, and the light of telling through monochromator is directly coupled to the spectrum of measuring incident light on the detector; 3, measured target is through looking in the distance or microscopic system enters the slit of monochromator, and the light of telling through monochromator is directly coupled to the spectrum of measuring incident light on the detector, thereby realizes remote sensing or micrometering.
Described spectral coverage has comprised that visible light is near infrared region, wavelength is 380nm～2500nm, drive the increase of grating rotating angle by direct current generator and also can measure ultraviolet and middle thermal infrared region, but be not coupled to sample by optical fiber, the light of telling by monochromator is coupled to detector through reflection part (integrating sphere, reflecting plate), switches the second order spectrum of eliminating a spectral coverage by optical filter.
Described signal amplifier adopts electric current to amplify, and adopts ultralow direct current biasing operational amplifier to constitute.
Described signal-processing board circuit comprises that adaptive tracing filtering circuit, synchronous integration amplifying circuit, phase-sensitive detection circuit, high-order Bart this low-pass filter circuit difficult to understand of circuit connection and the reference channel signal from the chopping the light device that output terminal connects synchronous integration circuit and its input end of phase-sensitive detection circuit respectively constitute, can make modulated ac input signal become the low-down relatively direct current signal of noise like this, make things convenient for the collection of signal, improved the measuring accuracy of system greatly.
Described detector refrigeration adopts the PID control circuit, and detector is operated in the steady temperature that is lower than zero degree, drives the DC-DC step-down chip that adopts high-efficiency high-power, the voltage 1.3V that exports after the step-down, and electric current is greater than 3A, and efficient is better than 75%.
Described instrument temperature control, adopt the mode of semiconductor refrigerating, heat pipe and fan heat radiation that the instrument internal heat is shed, structure is seen accompanying drawing 8, adopt PID control circuit and PWM type of drive control semiconductor refrigerating and fan heat radiation, it is consistent with the maintenance internal and external temperature to have very high efficient, eliminates the influence of environment temperature simultaneously when measuring by each scanning standard sample.
The utlity model has following characteristics;
1, adopted direct current generator to drive raster scanning, solved traditional long term wear and caused instrument performance to descend and the slow problem of sweep velocity because of using screw mandrel transmission or cam drive mode to bring.
2, adopt photoelectric encoder as position feedback, the wavelength bearing accuracy and the repeatability of instrument are much improved.
3, adopt transmission and the measurement component of optical fiber as luminous energy, instrument has very strong dirigibility.
4, the instrument volume little, in light weight, not only be adapted at line analysis, and on-the-spot the use carried in suitable field.
5, cost performance height.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is that horizontal imaging of the present utility model is deleted the monochromator index path.
Fig. 3 is that staggered form imaging of the present utility model is deleted the monochromator index path.
Fig. 4 is that light of the present utility model is deleted the sweep test cross-sectional view.
Fig. 5 is a reflective measurement assembly synoptic diagram of the present utility model.
Fig. 6 is an integrating sphere diffuse reflectance measurement assembly synoptic diagram of the present utility model.
Fig. 7 is a transmission measurement assembly synoptic diagram of the present utility model.
Fig. 8 is semiconductor refrigerating of the present utility model, fan and apparatus wall combination synoptic diagram.
Fig. 9 is the signal processing circuit block diagram.
In Fig. 1 to Fig. 9,1, light source 2, poly-lens 3, chopping the light device 4, entrance slit 5, filter set 6, grating monochromator 7, collimation concave mirror 8, grating 9, imaging concave mirror 10, imaging concave mirror 11, collimation concave mirror 12, raster scan device 13, photoelectric encoder and direct current generator 14, support 15, bearing 16, spacer ring 17, bearing 18, base plate 19, swivel mount, 20, grating frame 21, outstanding slit 22, coupling emergent light fiber optic connector 23, optical fiber 24, measure assembly 25, sample 26, condenser lens 27, condenser lens 28, outrigger 29, integrating sphere 30, left side condenser lens 31, right condenser lens 32, peripheral structure spare 33, single fiber 34, two optical fiber 35, sample cell 36, reflecting prism 37, coupling measurement light fiber optic connector 38, coupling measurement light fiber optic connector 39, silicon photo-detector 40, InGaAs detector 41, low-noise preamplifier 42, signal wire socket 43, connect prime amplifier to signal-processing board signal wire 44, signal-processing board circuit 45, data communication line 46, upper metering computer 47, fan 48, heat radiator 49, semiconductor cooling device 50, insulating collar 51, Instrument shell 52, light source cover 53, adaptive tracing filtering circuit 54, synchronous integration amplifying circuit 55, phase-sensitive detection circuit 56, high-order Bart this low-pass filter circuit 57 difficult to understand, reference channel signal from the chopping the light device.
Embodiment
The utility model comprises light source 1, the poly-lens 2 that are provided with along light path, chopping the light device 3, incident crack 4, optical filter 5, grating monochromator 6 and be connected with optical fiber 23 on the output terminal of its light path and measure assembly 24, the road optical fiber of measuring on assembly 24 output terminals in two optical fiber 23 is connected with coupling measurement light (visible light～shortwave near infrared) fiber optic connector 37, silicon photo-detector 39, low-noise preamplifier 41, signal wire socket 42, connect prime amplifier to signal-processing board signal wire 43, the input end of signal-processing board circuit 44, another road optical fiber 23 is connected with coupling measurement light (near infrared) fiber optic connector 38, InGaAs detector 40, low-noise preamplifier 41, signal wire socket 42, connect prime amplifier to signal-processing board signal wire 43, the input end of signal-processing board circuit 44, be connected with data communication line 45 and upper metering computer 46 on the circuit output end of signal-processing board circuit 44, the adaptive tracing filtering circuit 53 that described signal-processing board circuit 44 is connected by circuit, synchronous integration amplifying circuit 54, phase-sensitive detection circuit 55, form from the lock-in amplifier that the reference channel signal 57 of chopping the light device and high-order Bart this low-pass filter circuit difficult to understand are constituted.
In Fig. 8, in being provided with, light source cover 52 1 sides that are provided with illuminator in described light source 1 comprises and are provided with the printing opacity mouth establish the Instrument shell 51 of insulating collar 50, semiconductor cooling device 49 outsides of being equipped with on the side of light source cover 52 are connected with bell-type heat radiator 48, and the motor shaft that be equipped with bell-type heat radiator 48 inboards is provided with fan 47.Illuminator comprises any light source in halogen tungsten lamp, mercury lamp, deuterium lamp, this special infrared light supply of energy, the laser.
In Fig. 1, Fig. 2, Fig. 3 and Fig. 4, collimating mirror, the grating that described grating monochromator 6 is provided with by light path and become phase concave mirror three mirrors to be formed, its beam split light path comprises horizontal imaging monochromator or staggered form imaging monochromator, and horizontal imaging monochromator comprises collimation concave mirror 7 and the imaging concave mirror 9 that grating 8, right upper portion and the bottom in left side are provided with.Staggered form imaging monochromator comprises collimation concave mirror 11 and the imaging concave mirror 10 that grating 8, right upper portion and the bottom in left side are provided with, and described grating monochromator 6 also comprises the raster scan device 12 that light path is provided with.Described raster scan device 12 comprises the swivel mount 19 that is equipped with on the spacer ring 16 that is provided with between the bearing 15 and 17 that is equipped with on two sections of substrate plate 18 that direct current generator that support 14 is provided with and photoelectric encoder 13, support 14 are provided with and the motor shafts, the bearing 15 and 17 and the motor shaft, grating frame 20 and the grating 8 that swivel mount 19 bottoms are provided with, described direct current generator drives raster scanning mechanism swivel mount, by the position of encoder feedback recording wavelength scanning.
At Fig. 5, among Fig. 6 and Fig. 7, described measurement assembly 24 comprises reflective measurement assembly, integrating sphere diffuse reflectance measurement assembly and transmission measurement assembly, the sample mirror 25 that reflective measurement assembly is provided with by outrigger 28 tops, the optical fiber 23 that left condenser lens 26 that outrigger 28 inside are provided with and right condenser lens 27 and input end penetrate outrigger 28 bottoms and both sides constitutes, the sample mirror 25 that integrating sphere diffuse reflectance measurement assembly is provided with by integrating sphere 29 tops, the optical fiber 23 of corresponding lens of left condenser lens 30 that integrating sphere 29 two bottom sides are provided with and right condenser lens 31 and input end and counter sample eyeglass constitutes, the deferent segment of optical fiber 25 connects measures assembly 24, the reflecting prism 36 that sample cell 35 right sides that the transmission measurement assembly is provided with by peripheral structure frame 32 inboards are provided with, the single fiber 33 that sample cell 35 left sides are provided with and two optical fiber 34 constitute.
The concrete course of work is as follows:
Light source adopts halogen tungsten lamp, the spectral energy of halogen tungsten lamp radiation has comprised the continuous spectrum of 380～2500nm wave band, filament is by gathering lens 2 focal imagings on entrance slit 4, between poly-lens 2 and entrance slit 4, place chopping the light device 3, chopping the light device 3 adopts mechanical system, modulating motor adopts brshless DC motor at a high speed, filter set 5 adopts multiple optical filters to eliminate second order spectrum, light enters grating monochromator 6 by filter set 5, through grating monochromator 6 polychromatic light is divided into monochromatic light, the outstanding narrow 21 outstanding light that meet are coupled to optical fiber 23 by being coupled out coloured light fiber optic connector 22, optical fiber 23 links to each other with measurement assembly 24, the reflected light for the treatment of the side sample is collected on the optical fiber 23, optical fiber 23 is with two detector silicon photo-detectors 39 and the InGaAs detector 40 that couples light to instrument internal to be measured, the two-way detector amplifies signal and preceding pre-service by low-noise preamplifier 41 separately, signal is input to disposable plates circuit 44 and finishes the two paths of signals processing, obtain the high direct current signal of signal to noise ratio (S/N ratio), there is the microprocessor of a low-power consumption to be responsible for digital signal acquiring on the circuit on the signal-processing board, instrument observing and controlling and communication function, final signal is input to upper metering computer 46, finishes the spectrogram collection, show, work such as processing.
Measuring process mode 1: when measuring the reflectance spectrum of bulk or pulverulent solids and liquid, sample 25 selects for use the scanning standard plate to measure a kind of reflected signal, change the sample 25 of annex map into testing sample again and record another kind of reflected signal, the process software processes just can obtain the reflectance spectrum of sample, carries out the quantitative and qualitative analysis of sample then with the spectrum process software.
Measuring process mode 2: when measuring the reflectance spectrum of bulk or pulverulent solids and liquid equally, can light source 1 is external, light source 1 is coupled to entrance slit 4 by optical fiber, all the other are as mode 1.
Measuring process mode 3: the reflectance spectrum that absorbs solar light irradiation as passive remote measurement distant objects such as atmosphere, surface soil, vegetation, mine, during measurement light source 1 is removed, to gather lens 2 and change telephotolens into, and the injection light of monochromator outgoing will be directly coupled to silicon photo-detector 39 and InGaAs detector measurement 40 measure and get final product.
Measuring process mode 4: the emission spectrum of small items such as measurement cell, during measurement light source 1 is removed, will gather lens 2 to change microcobjective into, all the other are as mode 3.
Claims (4)
1. visible light, near infrared light spectral analysis measuring instrument, comprise light source, the poly-lens that are provided with along light path, the chopping the light device, optical filter, grating monochromator, it is characterized in that optical fiber (23) on the light path output terminal of grating monochromator (6) connects measures assembly (24), the road optical fiber of measuring on assembly (24) output terminal in two optical fiber (23) is connected with coupling measurement light fiber optic connector (37), silicon photo-detector (39), low-noise preamplifier (41), signal wire socket (42), connect prime amplifier to signal-processing board signal wire (43), the input end of signal-processing board circuit (44), another road optical fiber (23) is connected with coupling measurement light fiber optic connector (38), InGaAs detector (40), low-noise preamplifier (41), signal wire socket (42), connect prime amplifier to signal-processing board signal wire (43), the input end of signal-processing board circuit (44) is connected with data communication line (45) and upper metering computer (46) on the output terminal of signal-processing board circuit (44).
2. a kind of visible light according to claim 1, near infrared light spectral analysis measuring instrument is characterized in that the lock-in amplifier that the reference channel signal from the chopping the light device (57) that adaptive tracing filtering circuit (53), synchronous integration amplifying circuit (54), phase-sensitive detection circuit (55), high-order Bart this low-pass filter circuit (56) difficult to understand that described signal-processing board circuit (44) is connected by circuit and output terminal connect synchronous integration amplifying circuit (54) and phase-sensitive detection circuit (55) input end is respectively constituted forms.
3. a kind of visible light according to claim 1, near infrared light spectral analysis measuring instrument, it is characterized in that the raster scan device (12) that described grating monochromator (6) is provided with by light path, described raster scan device (12) comprises direct current generator and the photoelectric encoder (13) that support (14) is provided with.
4. a kind of visible light according to claim 1, near infrared light spectral analysis measuring instrument, it is characterized in that light source cover (52) one sides that described light source (1) is provided with illuminator in comprising and is provided with the printing opacity mouth establish the Instrument shell (51) of insulating collar (50) in being provided with, semiconductor cooling device (49) outside of being equipped with on the side of light source cover (52) is connected with bell-type heat radiator (48), and the motor shaft that be equipped with bell-type heat radiator (48) inboard is provided with fan (47).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200939655U CN201045610Y (en) | 2007-06-18 | 2007-06-18 | Visible light, near infrared light spectral analysis measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200939655U CN201045610Y (en) | 2007-06-18 | 2007-06-18 | Visible light, near infrared light spectral analysis measuring instrument |
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| CN201045610Y true CN201045610Y (en) | 2008-04-09 |
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| CNU2007200939655U Expired - Fee Related CN201045610Y (en) | 2007-06-18 | 2007-06-18 | Visible light, near infrared light spectral analysis measuring instrument |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507157A (en) * | 2011-11-17 | 2012-06-20 | 东华大学 | Device and method for measuring performance of glass film in filtering visible light and near-infrared light |
| CN102507489A (en) * | 2011-11-09 | 2012-06-20 | 北京航天益来电子科技有限公司 | Device and method for detecting concentration of harmful gases in sample gas |
| CN102507456A (en) * | 2011-11-17 | 2012-06-20 | 东华大学 | Device and method for measuring capability of glass and adhesive film of glass in filtering ultraviolet rays and visible light |
| CN102721663A (en) * | 2012-05-28 | 2012-10-10 | 中国科学院长春光学精密机械与物理研究所 | Near-infrared soil spectrum denoising method based on self-adapting filtering |
| CN103528984A (en) * | 2013-10-22 | 2014-01-22 | 长春长光思博光谱技术有限公司 | Optical grating type near infrared analyzer |
| CN104713487A (en) * | 2013-12-11 | 2015-06-17 | 睿励科学仪器（上海）有限公司 | Adjustable light source device and precise measurement equipment comprising same |
| CN104953970A (en) * | 2015-06-30 | 2015-09-30 | 中国地质调查局南京地质调查中心 | Phase-locked amplifier |
| CN105043542A (en) * | 2015-08-05 | 2015-11-11 | 中国电子科技集团公司第四十一研究所 | Continuous adjustable monochromatic output device based on gradual change optical filter |
| CN106018324A (en) * | 2016-08-15 | 2016-10-12 | 中国计量大学 | Plastic identification apparatus and method based on near-infrared spectroscopy analysis |
| CN107884069A (en) * | 2016-09-30 | 2018-04-06 | 高利通科技（深圳）有限公司 | A kind of broadband spectral light source |
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2007
- 2007-06-18 CN CNU2007200939655U patent/CN201045610Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102507489A (en) * | 2011-11-09 | 2012-06-20 | 北京航天益来电子科技有限公司 | Device and method for detecting concentration of harmful gases in sample gas |
| CN102507489B (en) * | 2011-11-09 | 2014-07-02 | 北京航天益来电子科技有限公司 | Device and method for detecting concentration of harmful gases in sample gas |
| CN102507157A (en) * | 2011-11-17 | 2012-06-20 | 东华大学 | Device and method for measuring performance of glass film in filtering visible light and near-infrared light |
| CN102507456A (en) * | 2011-11-17 | 2012-06-20 | 东华大学 | Device and method for measuring capability of glass and adhesive film of glass in filtering ultraviolet rays and visible light |
| CN102721663A (en) * | 2012-05-28 | 2012-10-10 | 中国科学院长春光学精密机械与物理研究所 | Near-infrared soil spectrum denoising method based on self-adapting filtering |
| CN103528984A (en) * | 2013-10-22 | 2014-01-22 | 长春长光思博光谱技术有限公司 | Optical grating type near infrared analyzer |
| CN104713487A (en) * | 2013-12-11 | 2015-06-17 | 睿励科学仪器（上海）有限公司 | Adjustable light source device and precise measurement equipment comprising same |
| CN104713487B (en) * | 2013-12-11 | 2017-08-22 | 睿励科学仪器（上海）有限公司 | Adjustable light sources device and the precision measurement equipment including the device |
| CN104953970A (en) * | 2015-06-30 | 2015-09-30 | 中国地质调查局南京地质调查中心 | Phase-locked amplifier |
| CN105043542A (en) * | 2015-08-05 | 2015-11-11 | 中国电子科技集团公司第四十一研究所 | Continuous adjustable monochromatic output device based on gradual change optical filter |
| CN106018324A (en) * | 2016-08-15 | 2016-10-12 | 中国计量大学 | Plastic identification apparatus and method based on near-infrared spectroscopy analysis |
| CN107884069A (en) * | 2016-09-30 | 2018-04-06 | 高利通科技（深圳）有限公司 | A kind of broadband spectral light source |
| CN107884069B (en) * | 2016-09-30 | 2023-08-22 | 高利通科技（深圳）有限公司 | Broadband spectrum light source |
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Granted publication date: 20080409 Termination date: 20140618 |
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