CN104713646B - A kind of wide band light spectrometer and spectrum recovering method thereof - Google Patents
A kind of wide band light spectrometer and spectrum recovering method thereof Download PDFInfo
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Abstract
The invention discloses a kind of wide band light spectrometer and spectrum recovering method thereof.This spectrogrph includes light-splitting device, array detection chip, and data collection and transmission；Light-splitting device can make the incident illumination of different frequency form different light distribution on array detection chip surface through later, and the incident illumination of same frequency is angular distribution also different through light intensity produced by the different parts of light-splitting device；This spectrogrph also includes being arranged at the light wavelength conversion member before or after described light-splitting device, and described light wavelength conversion member includes wavelength conversion layer, comprises at least one wavelength converting optical material in described wavelength conversion layer；The part or all of absorption spectrum of wavelength converting optical material is beyond the investigative range of described array detection chip, and its emission spectrum is all in the investigative range of described array detection chip.Compared to existing technology, it has the advantage such as simple in construction, cheap, highly sensitive, spectral measurement ranges width.
Description
Technical field
The present invention relates to a kind of spectrogrph, particularly relate to a kind of wide band light spectrometer with wider measurement frequency range and light thereof
Recovery of spectrum method, belongs to field of optical measuring technologies.
Background technology
Spectrogrph is research, measures the frequency of light radiation, strength characteristics and the optical instrument of Changing Pattern thereof.It should be used up
Chromatic dispersion principle, diffraction principle or optical modulation principle, by the light radiation of different frequency according to certain rule separately, shape
Become spectrum, coordinate a series of optics, precision optical machinery, electronics and computer system, it is achieved frequency and the intensity to light radiation
Micrometric measurement and research.Spectrogrph has the advantages such as analysis precision is high, measurement scope is big, speed is fast, is widely used in
The fields such as metallurgy, geological prospecting, biomedicine, petrochemical industry, astronomical observation, environmental conservation.
In recent years due to the modernization development in the fields such as environmental monitoring, modern agriculture, military analysis and industrial flow monitoring,
Require analytical tool miniaturization, lightweight, at special occasions (such as environmental protection, field, Site Detection, spaceborne analysis detection
Deng) also require instrument measuring frequency range width, resolution is high, vibration and interference resistance is strong, stable and reliable for performance.Therefore,
Need one miniaturization, spectrogrph integrated, intelligentized.Its power consumption is little, voltage is low, easy to use and flexible, property
Energy price ratio is high, and can obtain spectral signal quickly, in real time, intuitively.And the widely used spectrogrph of current institute is not only
Resolution is not high enough, measures frequency band the widest, and generally has that volume is big, expensive, installation and debugging are difficult, makes
By deficiencies such as condition harshnesses.As Fourier transform spectrometer, not only volume is relatively big, and to vibration sensing, its resolution is subject to
The impact of the moving range of index glass.Although grating volume used by optical grating diffraction type spectrogrph is relatively small, but this kind of spectrogrph
Resolution is the highest, and expensive [Yang Jae-chang, et al.Micro-electro-mechanical-systems-based
infrared spectrometer composed of multi-slit grating and bolometer array,Jap.J.of Appl.
Phys.47(8),6943-6948(2008)]。
For solving the problems referred to above, the Tao Yang seminar of Nanjing Univ. of Posts and Telecommunications proposes a series of based on different light-splitting devices in the recent period
Micro spectrometer and spectrum recovering method, such as, in Publication No. disclosed in 11 days July in 2012
CN102564586A, title is " diffraction hole arrays structure mini spectrogrph and high-resolution spectroscopy restored method thereof "
Chinese invention patent；In Publication No. CN 103196557A disclosed in 10 days July in 2013, entitled " a kind of light
Spectrometer " Chinese invention patent；In Publication No. CN103063299A disclosed in 24 days April in 2013, entitled " one
Kind of micro spectrometer " Chinese invention patent, etc..Its core component is to build dividing on CCD or CMOS
Optical device, light-splitting device can make the incident illumination of different frequency form different light intensity through later on array detection chip surface
Distribution, and the incident illumination of same frequency is angular distribution also different through light intensity produced by the different parts of light-splitting device.Therefore
Can be by measuring the luminous power of a series of different pixels in CCD or CMOS, it is possible to utilize and solve big Linear side
The method of journey group restores spectrum.Compared with traditional grating spectrograph or Fourier transform spectrometer, its volume is little, frequency
Resolution is high, spectral measurement ranges width, it is possible to achieve static measurement in real time.
But, the measurement scope of above-mentioned spectral measurement device is all limited by the arrays such as used CCD or CMOS and visits
Surveying the frequency range that chip can detect, once incident light frequency is beyond the investigative range of array detection chip, then cannot
Carrying out spectral measurement, actual application can be produced and compare large effect by this.Such as, due to the electronic spectrum of most of molecules
Being in ultraviolet region, the chemical reaction of material is mainly the electronics decision of molecule, utilizes the electronic spectrum of molecule to enter
The molecular spectroscopy techniques work that the analysis of row Molecular characterization, quantitative analysis, structural analysis and molecular chemical reaction etc. are relevant, because of
The measurement of this ultraviolet spectra has become the important development direction that present spectral measurement is studied.And for example in organic molecule, compositionization
The atom learning key or functional group is in the state of constantly vibration, and its frequency of vibration is suitable with the frequency of vibration of infrared light.So,
During with Infrared irradiation organic molecule, chemical bond or functional group in molecule can occur absorption of vibrations, different chemical bonds
Or functional group's adsorption frequency is different, infrared spectrum will be in diverse location, thus can obtain by measuring infrared spectrum
Containing which kind of chemical bond or the information of functional group in molecule.And the wavelength detection scope of common CCD or CMOS typically exists
400nm to 1000nm, therefore, the application of spectrogrph based on CCD or CMOS receives restriction.
In summary, need one badly and have simple in construction, cheap, highly sensitive, spectral measurement ranges width etc. simultaneously concurrently
The spectral measurement device of advantage.
Summary of the invention
The technical problem to be solved is to overcome prior art not enough, it is provided that one has simple in construction, price concurrently
The wide band light spectrometer of the advantages such as cheap, highly sensitive, spectral measurement ranges width and spectrum recovering method thereof.
The present invention is concrete by the following technical solutions:
A kind of wide band light spectrometer, including light-splitting device, array detection chip, and with described array detection chip even
The data collection and transmission connect；Described light-splitting device can make the incident illumination of different frequency detect core through later in array
Sheet surface forms different light distribution, and the incident illumination of same frequency is through light produced by the different parts of light-splitting device
The most angular distribution also different；Described wide band light spectrometer also includes being arranged at the light wavelength conversion before or after described light-splitting device
Parts, described light wavelength conversion member includes wavelength conversion layer, comprises at least one wavelength convert in described wavelength conversion layer
Optical material；The part or all of absorption spectrum of described wavelength converting optical material is beyond the spy of described array detection chip
Survey scope, and its emission spectrum is all in the investigative range of described array detection chip.
Preferably, described wavelength conversion layer is the composite bed being made up of at least two different wave length switchable optical material.
Further, described wide band light spectrometer also includes the optical collimator for collimating incident illumination.
Light-splitting device in technique scheme can use the various existing structure maybe having, as long as enabling to different frequency
Incident illumination form different light distribution on array detection chip surface through later, and the incident illumination of same frequency through point
Light intensity produced by the different parts of optical device is angular distribution also different.It is below several preferred version:
Described light-splitting device includes transparent substrates, at least one surface of described transparent substrates is fixed with at least one of which transparent
Coating, includes a packet size or the bubble of shape uneven distribution in described clear coat.
Described light-splitting device includes transparent substrates, a surface of described transparent substrates is attached with what opaque material made
Light blocking layer, light blocking layer is provided with the opening diffracting two dimension battle array being made up of a series of opening diffractings with different pore size size
Row, and each opening diffracting aperture size is close with lambda1-wavelength.
Described light-splitting device includes transparent substrates, and at least one surface of described transparent substrates is fixed with at least one of which nanometer
Particle coating, described nanoparticle coating is made up of the transparent particles of one group of nanometer to micro-meter scale, and the chi of transparent particles
Very little or the skewness of shape.
Described light-splitting device includes opaque substrate, and described opaque substrate is received towards being fixed with one layer on the surface of incident illumination
Rice corpuscles film, described film of nanoparticles include one group of nanometer to the opaque material particle differed in size of micro-nano-scale,
And described opaque material particle in film of nanoparticles in uneven distribution.
Described light-splitting device includes transparent substrates, and at least one surface of described transparent substrates is fixed with one layer of nanoparticle
Film, described film of nanoparticles includes that one group of nanometer is to the opaque material particle differed in size of micro-nano-scale and described
Opaque material particle in film of nanoparticles in uneven distribution.
Wherein, first three preferred version all can increase level of integrated system by following two technical scheme further, and reduction sets
Standby volume:
Described light wavelength conversion member and light-splitting device share same transparent substrates, and wavelength conversion layer is attached to described transparent base
One side surface of end incident illumination dorsad, clear coat, light blocking layer or nanoparticle coating be attached to described transparent substrates towards
One side surface of incident illumination.
Light-splitting device is using the wavelength conversion layer of light wavelength conversion member as transparent substrates.
The spectrum recovering method of wide band light spectrometer described in arbitrary technical scheme, comprises the following steps:
Step 1, the frequency range that described wide band light spectrometer can detect being divided into the frequency band that n frequency range is Δ f, n is big
In the integer of 3, the mid frequency of each frequency band is f1,f2,…fn；The frequency range that wide band light spectrometer can detect according to
Following methods determines: the absorption spectrum of all wavelengths switchable optical material comprised from light wavelength conversion member and array
The frequency range that formula detection chip can detect is selected frequency maxima and frequency minima, described frequency maxima and frequency
Frequency range between rate minima is the frequency range that described wide band light spectrometer can detect；
Step 2, make incident illumination to be measured pass sequentially through light wavelength conversion member, light-splitting device, measure described array detection chip
The optical power value that middle n pixel is detected, is designated as P1,P2,…Pn；
Step 3, obtain each frequency component f in incident illumination to be measured by solving following matrix equation1,f2,…,fnSize P (f1),
P(f2) ..., P (fn):
In formula, Cij(i=1,2 ... n) (j=1,2 ... n) represent that mid frequency is fjFrequency band light through with without described point
In the case of optical device, the ratio of the optical power value that i-th pixel is detected in described array detection chip n pixel,
Recorded in advance by experiment；
Step 4, to P (f1),P(f2),…,P(fn) carry out linear fit, and through spectral calibration, obtain the spectrum of incident illumination to be measured.
Compared to existing technology, the method have the advantages that
1, volume is little.The light wavelength conversion member that the present invention uses and light-splitting device are all the particles of nanometer or micron level
A lot of pixels is had in coating, and the less area of detection array chip, so whole system and existing commercial spectrometers
Phase specific volume is greatly reduced.
2, low cost.The light wavelength conversion member used in wide band light spectrometer of the present invention all can use existing with light-splitting device
Prepared by maturation process technology, its cost of manufacture is low, and easy to make；And array detection chip can use existing maturation
CCD or CMOS, therefore whole system cost is relatively low.
3, there is higher resolution.The resolution of spectrum is mainly determined by the quantity of pixel in detection array chip, and
The pixel of detection array chip can reach more than million, so whole spectrogrph can reach the highest frequency at present
Resolution.
4, there is broader spectral measurement ranges.Wide band light spectrometer of the present invention passes through light wavelength conversion member to spectral measurement
Scope is expanded, and makes the spectral region of this spectrometer detection the most can not be visited by detector used by spectrogrph
The restriction of the maximum spectral region surveyed.
Accompanying drawing explanation
Fig. 1 is the structural representation of one preferred embodiment of wide band light spectrometer of the present invention；
Fig. 2 is the top view of a kind of light-splitting device that wide band light spectrometer of the present invention uses；
Fig. 3 is the absorption spectrum of a kind of wavelength converting optical material；
Fig. 4 is the emission spectrum of this wavelength converting optical material；
In figure, each label implication is as follows: 1, light wavelength conversion member, 2, light-splitting device, 3, array detection chip, 4,
Collimation concave mirror, 5, diaphragm.
Detailed description of the invention
Below in conjunction with the accompanying drawings technical scheme is described in detail:
The thinking of the present invention is on the basis of existing spectral measurement device based on light-splitting device, in the optical path introduce have by
The light wavelength conversion member of the wavelength conversion layer that wavelength converting optical material is constituted, will detect model beyond array detection chip
The wavelength convert of the incident illumination enclosed is to array detection chip investigative range, and utilizes the method solving large-scale matrix equation multiple
Former spectrum, thus effectively expand the measurement scope that spectrogrph is overall so that spectrogrph entirety is measured scope and is no longer influenced by battle array
The limitation of column detection chip investigative range.
Before technical solution of the present invention is described in detail, first the substance of wavelength converting optical material is carried out letter
Introduce.
Material for transformation of wave length used in the present invention, can be a cutter such as up-conversion luminescent material, down-conversion luminescent material
There is the material of the characteristic of the light emission another kind wavelength absorbing a kind of wavelength.Stokes' law thinks that some material can be subject to
Excite to high-octane light, send low-energy light, in other words, it is simply that it is long that what the short frequency of wavelength was high inspires wavelength
The low light of frequency.Such as ultraviolet excites and sends visible ray.Such material is exactly down-conversion luminescent material.On the contrary,
Some material can realize and the illumination effect of above-mentioned law contrast, and then we are called anti-Stokes luminescence,
Also known as up-conversion luminescence, such material is referred to as up-conversion luminescent material.
Certainly, if the laser that the just light intensity measured by spectrogrph is stronger, material for transformation of wave length can also use optics non-
Linear material, such as double-frequency material etc..
Light wavelength conversion member of the present invention all can realize spectral measurement model before or after being arranged at light-splitting device
The expansion enclosed, but the emission spectrum in view of most existing wavelength convert luminescent materials is narrower, so that light is through light splitting
After device, the light of the different wave length light distribution difference on formation formula detection chip surface is more significantly, thus is conducive to logical
The method crossing solution matrix equation restores spectrum, the present invention preferably light wavelength conversion member is arranged at light-splitting device it
After, i.e. between light-splitting device and array detection chip.
Fig. 1 shows a preferred embodiment of wide band light spectrometer of the present invention.As it is shown in figure 1, this wide band light spectrometer includes
The optical collimator that sets gradually along light path incident direction, light-splitting device 2, light wavelength conversion member 1, array are visited
Survey chip 3, and the data collection and transmission (not shown in figure 1) being connected with described array detection chip 3.
Wherein, light wavelength conversion member 1 include transparent substrates (can also need not, i.e. directly with wavelength conversion layer directly as
Light wavelength conversion member 1) and it is attached to the wavelength conversion layer on described transparent substrates surface, described wavelength conversion layer wraps
Containing at least one wavelength converting optical material；The part or all of absorption spectrum of described wavelength converting optical material is beyond described
The investigative range of array detection chip, and its emission spectrum is all in the investigative range of described array detection chip.
In order to further expand measurement scope and improve integrated level, described wavelength conversion layer is preferably and is turned by least two different wave length
Change the composite bed that optical material is constituted.Light-splitting device 2 can make the incident illumination of different frequency divide through forming different light intensity later
Cloth, and the incident illumination of same frequency is angular distribution also different through light intensity produced by the different parts of light-splitting device；Such that
The luminous power that can arrive according to each pixel detecting of array detection chip 3, utilizes the method solving large-scale matrix equation to restore
Spectrum.Optical collimator, for being directional light by incident illumination collimation, can use existing various structure, in the present embodiment
Optical collimator as it is shown in figure 1, be made up of two collimation concave mirrors 4 and diaphragm 5.
Light-splitting device 2 used in the present invention can use the existing structure maybe having, as long as enabling to entering of different frequency
Penetrate light and form different (scattering and/or diffraction) light distribution through later, and the incident illumination of same frequency is through light-splitting device
Different parts produced (scattering and/or diffraction) light intensity angular distribution also different.Several preferred side is set forth below
Case:
The first scheme:
As in figure 2 it is shown, described light-splitting device includes transparent substrates, at least one surface of described transparent substrates is fixed with
At least one of which clear coat, includes a packet size or the bubble of shape uneven distribution in described clear coat.
When using this light-splitting device, incident illumination can occur in various degree when passing each bubble differed in size in bubble coating
Diffraction and interference, specific as follows:
1, the light of different wave length is mapped to the same area of same bubble, the angle of diffraction of the different wave length diffraction light of outgoing
Different, certain diffraction intensity distribution can be formed.
2, the light of the Same Wavelength different parts by same bubble, can form interference after outgoing.Due to Air Bubble Size shape
Shape is different, and the phase contrast between emergent light is different, and interference light intensity is the most different.
3, by there is diffraction in the light of Same Wavelength after the different parts of different bubbles, the identical diffraction light in the direction of propagation it
Between also can interfere.
Owing to interfering and diffraction effect, after incident illumination is by bubble coating, certain interference and diffraction will be formed below
Light is distributed, and pixels different in final detection array chip will collect the luminous power differed in size.
This light-splitting device can use existing maturation process to prepare, and such as, one of which method is: by helium, neon,
The noble gases such as argon, Krypton or xenon be continuously injected into polymethyl methacrylate (PMMA) and derivant thereof or
In the polymer melts such as person's polystyrene (PS) or Merlon (PC), and by ultrasound wave by indifferent gas bromhidrosis
Bubble refines, and after air bubble content and distribution level off to and stablize in thing melt to be polymerized, is coated onto transparent substrates surface
On, then cooling makes polymer melt be solidified as polymer coating, so, will produce distribution not in polymer coating
All, bubble not of uniform size.Second method is: at a certain temperature, by polymer such as PMMA, PS or PC
It is dissolved in organic solvent (such as oxolane, acetone, toluene etc.), obtains the polymerizations such as PMMA, PS or PC
The solution of thing, then by its spin coating on a transparent substrate, and slow cooling is to room temperature, during cooling, solvent
Volatilization causes producing different pore in the polymer coating formed.
First scheme:
Described light-splitting device includes transparent substrates, a surface of described transparent substrates is attached with what opaque material made
Light blocking layer, light blocking layer is provided with the opening diffracting two dimension battle array being made up of a series of opening diffractings with different pore size size
Row, and each opening diffracting aperture size is close with lambda1-wavelength.
When using this light-splitting device, incident illumination can occur when passing each opening diffracting differed in size in opening diffracting two-dimensional array
Diffraction in various degree, will form certain diffraction light distribution below, and pixels different in final detection array chip will
Collect the luminous power differed in size.
The transparent substrates of this light-splitting device can use polymeric material, and light blocking layer is light-proof material, can use crome metal,
Evaporation coating method can be used to make.The making of opening diffracting can use the method for ion etching, i.e. with ion generator send from
Son bundle focuses on light blocking layer surface, and active position and time by precision control ion beam perform etching, additionally photoetching
Also it is one of alternative.
The third scheme:
Described light-splitting device includes transparent substrates, and at least one surface of described transparent substrates is fixed with at least one of which nanometer
Particle coating, described nanoparticle coating is made up of the transparent particles of one group of nanometer to micro-meter scale, and the chi of transparent particles
Very little or the skewness of shape.
During each transparent particles (or title nanoparticle) that incident illumination does not waits through size/in nanoparticle coating or shape
Can scatter.Particle diameter according to each transparent particles is different from the relative size of each optical wavelength to be measured, and this scattering can be auspicious
Profit scattering or Mie scattering.When above-mentioned two class scattering phenomenon either or both of which occurring the most sometimes, incident illumination is through receiving
After rice corpuscles coating, some light can deviate the former direction of propagation.And due to each Nanoparticle Size in nanoparticle coating
Different, skewness, the angular distribution inequality of each wavelength light energy, finally these light are radiated in array detection chip,
Each pixel will collect a series of luminous power differed in size.Therefore, the mode of same available solution matrix equation is entered
Row spectrum recovering.
Above-mentioned light-splitting device can be prepared by the following method: first prepares the mixing comprising different size transparent particles suspended
Liquid, then makes the transparent particles in mixing suspension be deposited on transparent substrates surface by electrostatic self-assembled method.
4th kind of scheme:
Described light-splitting device includes opaque substrate, and described opaque substrate is received towards being fixed with one layer on the surface of incident illumination
Rice corpuscles film, described film of nanoparticles include one group of nanometer to the opaque material particle differed in size of micro-nano-scale,
And described opaque material particle in film of nanoparticles in uneven distribution.
Owing to the size of opaque material particle is different, irregular arrangement, therefore the light of different frequency is irradiated to nanoparticle
Different scattered light intensity distributions can be formed on film, and the light of same frequency is through the opaque material KPT Scatter of same position
After, its scattered light intensity is the most different.So, the pixel of the various location in array detection chip may detect difference
Scattered light power.The mode utilizing solution matrix equation can carry out spectrum recovering.
Wherein opaque material particle can use silver or other metal material, and can use the Electrostatic Absorption of existing maturation, gas
The method such as deposition prepares this light-splitting device mutually.
Fifth version:
Described light-splitting device includes transparent substrates, and at least one surface of described transparent substrates is fixed with one layer of nanoparticle
Film, described film of nanoparticles includes that one group of nanometer is to the opaque material particle differed in size of micro-nano-scale and described
Opaque material particle in film of nanoparticles in uneven distribution.
Similar with the 4th kind of scheme, owing to the size of opaque material particle is different, irregular arrangement, therefore different frequency
Light be irradiated on film of nanoparticles to be formed different scattered light intensity distributions, and the light of same frequency is through same position not
After transparent material KPT Scatter, its scattered light intensity is the most different.
In first three scheme, incident illumination is through light-splitting device (spectrogrph shown in Fig. 1 i.e. uses this type of light-splitting device),
Light wavelength conversion member and array detection chip are set in turn in the side of light-splitting device incident illumination dorsad；And latter two side
In case, light wavelength conversion member and array detection chip are set in turn in the light-splitting device side towards incident illumination；Therefore,
First three scheme all can increase level of integrated system the most by the following technical programs, reduction equipment volume:
Described light wavelength conversion member and light-splitting device share same transparent substrates, and wavelength conversion layer is attached to described transparent base
One side surface of end incident illumination dorsad, clear coat, light blocking layer or nanoparticle coating be attached to described transparent substrates towards
One side surface of incident illumination；Or, directly with the transparent substrates using wavelength conversion layer as light-splitting device；Or, with ripple
Long conversion layer is as the clear coat of light-splitting device or nanoparticle coating.Such that can be by the device of two kinds of difference in functionalitys
Become one, on the one hand can significantly reduce system bulk, on the other hand can reduce technological process.
Wavelength converting optical material in wide band light spectrometer of the present invention can use existing maybe by the various upper conversion having or lower turn
Conversion materials, as long as meeting the part or all of absorption spectrum investigative range beyond described array detection chip, and launches light
Spectrum, the most all can the measurement scope of effective spread spectrum instrument all in the investigative range of described array detection chip.This reality
Execute and example uses lower switchable optical material (MOF) Eu3 (MFDA) 4 (NO3) (DMF) 3 (H2MFDA=of one
9,9-dimethylfluorene-2,7-dicarboxylic acid)[Xinhui Zhou et al,A microporous luminescent
europium metal–organic framework for nitro explosive sensing,Dalton Trans.,2013,42,
5718-5723], the most as shown in Figure 3, Figure 4, absorption spectrum ranges is about for its absorption spectrum and emission spectrum
250nm～450nm, the array detection core that emission spectrum scope is about in 590nm～640nm, the present embodiment
Sheet uses model to be the CCD chip of SONY-ICX285AL, and its detecting band is about 400nm～1000nm.
So using the light wavelength conversion member that this material is made, the wavelength detection range expansion of spectrogrph can be made the most extremely
250nm～1000nm, more wider than the detection wave-length coverage of detection chip itself.
The concrete preparation method of the most above-mentioned lower conversion luminescent material be described below:
By 2.03 gram 2, bromo-9 Fluorenones of 7-bis-are dissolved in the oxolane of 220 milliliters, and are cooled to subzero by this solution
78 degrees Celsius.Then in 10 minutes, in solution, it is slowly added to the lithium methide (16mmol) of 7.5 milliliters.After one hour,
The tert-butyl lithium of 24 milliliters (31.2mmol) were slowly added in solution with 30 minutes.After two hours, in solution, lead to one
And a half hours carbon dioxide, then cooling bath is removed, obtains suspension.This suspension is stirred at room temperature
Distillation of reducing pressure after 1 hour obtains solid.Then the solid obtained is dissolved in the water of 90 milliliters, the most while stirring
Add the dichloromethane of 20 milliliters and the concentrated hydrochloric acid of 4 milliliters obtains pink solid precipitate, the most again hot water wash
Wash, and be dried 12 hours at 40 degrees Celsius, just obtained 9-methyl-9-hydroxyl-Fluorenone-2,7-dicarboxylic acids (H2MHFDA)。
Then by 28.4 milligrams of H2MHFDA, 44.7 milligrams of europium nitrates, 5 milliliters of dimethylformamides, 2 milliliters of ethanol,
1 milliliter of acetonitrile and 1 milliliter of water join in 25 milliliters of teflon-lined reactors, and reactor is placed on baking
In case, and 80 degrees Celsius of constant temperature three days, then reactor is the most slowly cooled down, so that it may obtain faint yellow crystalline substance
Body.
It is dispersed in tetrahydrofuran solvent after ultrasonic for the light yellow crystal obtained grinding, is spun on transparent substrates surface and dries
Dry, so that it may to obtain light wavelength conversion member.
Until light-metering through optical collimator collimation for being incident to light-splitting device 2 after directional light and scatter and/or diffraction being (concrete
The structures shape of light splitting machine reason light-splitting device) after again through light wavelength conversion member 1, if treat light-metering wavelength (or
Frequency) in the absorption spectrum of wavelength converting optical material, then it is converted into and can be detected by array detection chip 3
Wavelength (or frequency)；Otherwise, treat that light-metering is directed through light wavelength conversion member 1.After light wavelength conversion member 1
Transmission light form corresponding scattering and/or diffraction light on array detection chip 3 (such as CCD, CMOS etc.) surface
Strong distribution, is arrived by each pixel detecting in array detection chip 3；Data collection and transmission gathers array detection
The detection data of each pixel in chip 3, and carry out spectrum recovering according to the data collected.
The method of spectrum recovering is specific as follows:
Step 1, the frequency range that described wide band light spectrometer can detect being divided into the frequency band that n frequency range is Δ f, n is big
In the integer of 3, the mid frequency of each frequency band is f1,f2,…fn；The frequency range that wide band light spectrometer can detect according to
Following methods determines: the absorption spectrum of all wavelengths switchable optical material comprised from light wavelength conversion member and array
The frequency range that formula detection chip can detect is selected frequency maxima and frequency minima, described frequency maxima and frequency
Frequency range between rate minima is the frequency range that described wide band light spectrometer can detect；
Step 2, make incident illumination to be measured pass sequentially through light wavelength conversion member, light-splitting device, measure described array detection chip
The optical power value that middle n pixel is detected, is designated as P1,P2,…Pn；
Step 3, obtain each frequency component f in incident illumination to be measured by solving following matrix equation1,f2,…,fnSize P (f1),
P(f2) ..., P (fn):
In formula, Cij(i=1,2 ... n) (j=1,2 ... n) represent that mid frequency is fjFrequency band light through with without described point
In the case of optical device, the ratio of the optical power value that i-th pixel is detected in described array detection chip n pixel,
Can be recorded in advance by following experiment: with mid frequency as fjThe light of frequency band as incident illumination, taking light splitting away respectively
Device obtains the luminous power that in array detection chip, n pixel is detected, wherein in the case of not taking light-splitting device away
The ratio of the optical power value in the case of i-th pixel detected two kinds is Cij.Above-mentioned matrix equation can pass through
Tikhonov regularization equation solution.
Step 4, to P (f1),P(f2),…,P(fn) carry out linear fit, and through spectral calibration, obtain the spectrum of incident illumination to be measured.
Claims (13)
1. a wide band light spectrometer, including light-splitting device, array detection chip, and with described array detection chip even
The data collection and transmission connect；Described light-splitting device can make the incident illumination of different frequency detect core through later in array
Sheet surface forms different light distribution, and the incident illumination of same frequency is through light produced by the different parts of light-splitting device
The most angular distribution also different；It is characterized in that, before or after described wide band light spectrometer also includes being arranged at described light-splitting device
Light wavelength conversion member, described light wavelength conversion member includes wavelength conversion layer, comprises at least in described wavelength conversion layer
A kind of wavelength converting optical material；The part or all of absorption spectrum of described wavelength converting optical material exceeds described array
The investigative range of detection chip, and its emission spectrum is all in the investigative range of described array detection chip.
2. wide band light spectrometer as claimed in claim 1, it is characterised in that described wavelength conversion layer is by least two difference ripple
The composite bed that long switchable optical material is constituted.
3. wide band light spectrometer as claimed in claim 1, it is characterised in that also include the optics for incident illumination is collimated
Collimator apparatus.
4. wide band light spectrometer as claimed in claim 1, it is characterised in that described light-splitting device includes transparent substrates, described
Be fixed with at least one of which clear coat at least one surface of bright substrate, described clear coat includes a packet size or
The bubble of shape uneven distribution.
5. wide band light spectrometer as claimed in claim 4, it is characterised in that light-splitting device turns with the wavelength of light wavelength conversion member
Change layer as described clear coat.
6. wide band light spectrometer as claimed in claim 1, it is characterised in that described light-splitting device includes transparent substrates, described
It is attached with the light blocking layer that opaque material makes on one surface of bright substrate, light blocking layer is provided with and is had not by a series of
The opening diffracting two-dimensional array constituted with the opening diffracting of aperture size, and each opening diffracting aperture size connects with lambda1-wavelength
Closely.
7. wide band light spectrometer as claimed in claim 1, it is characterised in that described light-splitting device includes transparent substrates, described
Being fixed with at least one of which nanoparticle coating at least one surface of bright substrate, described nanoparticle coating is by one group of nanometer
Transparent particles to micro-meter scale is constituted, and the size of transparent particles or the skewness of shape.
8. wide band light spectrometer as claimed in claim 7, it is characterised in that light-splitting device turns with the wavelength of light wavelength conversion member
Change layer as described nanoparticle coating.
9. wide band light spectrometer as described in any one of claim 4,6 or 7, it is characterised in that described light wavelength conversion member with
Light-splitting device shares same transparent substrates, and wavelength conversion layer is attached to a side surface of described transparent substrates incident illumination dorsad,
Clear coat, light blocking layer or nanoparticle coating are attached to a described transparent substrates side surface towards incident illumination.
10. wide band light spectrometer as described in any one of claim 4,6 or 7, it is characterised in that light-splitting device turns with optical wavelength
Change the wavelength conversion layer of parts as transparent substrates.
11. as described in any one of claims 1 to 3 wide band light spectrometer, it is characterised in that described light-splitting device includes opaque
Substrate, described opaque substrate is fixed with one layer of film of nanoparticles, described film of nanoparticles bag on the surface of incident illumination
Include one group of nanometer to the opaque material particle differed in size of micro-nano-scale, and described opaque material particle is in nanometer
In uneven distribution in particle membrane.
12. as described in any one of claims 1 to 3 wide band light spectrometer, it is characterised in that described light-splitting device includes transparent base
The end, at least one surface of described transparent substrates being fixed with one layer of film of nanoparticles, described film of nanoparticles includes one group
Nanometer is to the opaque material particle differed in size of micro-nano-scale, and described opaque material particle is at film of nanoparticles
In in uneven distribution.
13. as described in any one of claim 1～12 spectrum recovering method of wide band light spectrometer, it is characterised in that include following
Step:
Step 1, the frequency range that described wide band light spectrometer can detect being divided into the frequency band that n frequency range is Δ f, n is 3
Above integer, the mid frequency of each frequency band is f1,f2,…fn；The frequency range that wide band light spectrometer can detect according to
Following methods determines: the absorption spectrum of all wavelengths switchable optical material comprised from light wavelength conversion member and array
The frequency range that formula detection chip can detect is selected frequency maxima and frequency minima, described frequency maxima and frequency
Frequency range between rate minima is the frequency range that described wide band light spectrometer can detect；
Step 2, make incident illumination to be measured pass sequentially through light wavelength conversion member, light-splitting device, measure described array detection chip
The optical power value that middle n pixel is detected, is designated as P1,P2,…Pn；
Step 3, obtain each frequency component f in incident illumination to be measured by solving following matrix equation1,f2,…,fnSize P (f1),
P(f2) ..., P (fn):
In formula, Cij(i=1,2 ... n) (j=1,2 ... n) represent that mid frequency is fjFrequency band light through with without described point
In the case of optical device, the ratio of the optical power value that i-th pixel is detected in described array detection chip n pixel,
Recorded in advance by experiment；
Step 4, to P (f1),P(f2),…,P(fn) carry out linear fit, and through spectral calibration, obtain the spectrum of incident illumination to be measured.
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