CN209542434U - A kind of spectrometer - Google Patents
A kind of spectrometer Download PDFInfo
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- CN209542434U CN209542434U CN201821858864.7U CN201821858864U CN209542434U CN 209542434 U CN209542434 U CN 209542434U CN 201821858864 U CN201821858864 U CN 201821858864U CN 209542434 U CN209542434 U CN 209542434U
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- light
- micro mirror
- mirror array
- matrix
- micro
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Abstract
The utility model discloses a kind of spectrometers, including light source, first lens, sample cell, second lens, optical filter, slit, first spherical mirror, grating, micro mirror array, the light that light source issues passes sequentially through above-mentioned component, it further include the detector for receiving a part of light through the second spherical mirror collimation after micro mirror array reflects, receive the attenuator without the second spherical mirror remainder light after micro mirror array reflects, it further include the controller being connect with micro mirror array, controller includes matrix template and carries the Hadamard transform matrix of different modes by matrix template, Hadamard transform matrix makes the state consistency required in the state and matrix template of each micro mirror in micro mirror array by the rotation that controller can control micro mirror array, it further include the amplifier to the amplification of collected signal, it receives amplified signal and is converted For the analog-digital converter of digital signal, when detecting water quality, which not only can quickly be detected, but also can detect simultaneously to many kinds of substance.
Description
Technical field
The utility model relates to field of spectral analysis technology, and in particular to a kind of spectrometer.
Background technique
With enriching constantly for people's social activities and increasing sharply and expanding, city for urban population quantity and scale
City's sanitary sewage problem is got worse.From the point of view of China's sewage discharge structure, resident's quantity of wastewater effluent was more than for the first time in 1999
Industrial wastewater discharge amount, between more than ten years later, resident's sewage is constantly in space of top prominence in China's urban sewage discharge, and
Specific gravity increases year by year.Water with people to the pay attention to day by day of environmental protection and health, as environmental protection subdivision field
Quality detection industry, water quality detection will increasingly cause to pay close attention in social life, water quality detection industry continue to from now on stablize,
Constantly develop.
In general, water quality detection instrument principle is the respective substance made in water by electrochemical reaction or chemical agent reaction
It participates, the content of respective substance in water outlet is then calculated by modes such as photometry, titration, conductivity measurements.And light
Degree method is relatively popularized currently on the market for water quality detection instrument again.The common technical method of photometry has: spectrophotometric
Meter method, photoelectric colorimetry.In general spectrophotometer detecting instrument drives the rotation of grating to select not using general motor
Same spectrum, to reach the requirement of substance different inside detection water, detection speed is slow, and equipment instrument is again bigger.
And photoelectric colorimetry is usually the detection completed by needing replacing different light sources to substance different inside water, general light
A kind of electric instrument of colorimeter can only detect one or more of substances.In actual operation, testing staff usually requires to detect more
The water quality of kind parameter, biggish workload need scientific method and efficient working efficiency to support and cooperate.
Therefore how to provide it is a kind of not only can quickly detect, but also be capable of many kinds of substance simultaneously detect spectrometer become in order to
Those skilled in the art's technical problem urgently to be solved.
Utility model content
The utility model intends to solve the technical problem by providing a kind of spectrometers.
The utility model provides a kind of spectrometer, including light source, to the light source issue light collimated first
Lens, receive the light after the sample cell reflects at the sample cell for receiving through the light of first collimated and accommodating sample
Line and the second lens assembled to it, allow optical filter being filtered to the light by second lens aggregation
The slit that is passed through by the light after the optical filter, receive the light by the slit and it is carried out collimation formed it is parallel
First spherical mirror of light, the grating for receiving the directional light, the micro mirror array for receiving the light after the optical grating diffraction, are also wrapped
Include receive through the micro mirror array reflection after and by the second spherical mirror collimate to be formed a part of light of directional light detector,
After micro mirror array reflection and the remainder light without second spherical mirror attenuator is received, further includes
The controller being connect with the micro mirror array, containing each micro mirror can be embodied in the micro mirror array at certain in the controller
The matrix template of the state at a moment and the Hadamard transform matrix that different modes are carried by the matrix template, Ah the reaching
Hadamard transform matrix makes each micro mirror in the micro mirror array by the rotation that the controller can control the micro mirror array
The state consistency required in state and the matrix template further includes connecting with the detector and amplifying to collected signal
Amplifier, receive amplified signal and be translated into the analog-digital converter of digital signal.
Preferably, the light source is halogen tungsten lamp light source.
Preferably, the optical filter is bandpass filter, the optical filter can make frequency range 360nm-700nm
Light pass through.
Preferably, the micro mirror array is rearranged by the reflecting mirror of several 16um × 16um.
Preferably, the detector is the diode silicon photocell of ultraviolet enhancing.
A kind of spectrometer of the utility model compared with prior art, has the advantages that
The Hadamard Transform Spectroscopy technology that the spectrometer uses is the modern digital conversion spectrum technology of a new generation, has light
Many advantages, such as flux is big, and acquisition spectroscopic data point is more, and the spectral information of gained sample is abundant, and scanning speed is fast.Therefore, the light
Spectrometer is provided with above-mentioned advantage；Secondly, the spectrometer can be used for the water quality detection of many kinds of parameters, honourable photometry and photoelectricity are taken into account
The advantages of colorimetric method, not only can quickly be detected, but can many kinds of substance detect simultaneously；In addition, micro mirror array is used in the present invention,
Different micro mirrors have different frequency, and so as to the parameter of the multiple frequencies of one-time detection, micro mirror array, which is repeatedly overturn, constitutes various combination
(similar repeatedly to weigh), and then improve signal-to-noise ratio, i.e. precision；Further, the spectrometer is light, is suitble to portable quick inspection
It surveys；In addition, the setting of attenuator, can eliminate unwanted light, light pollution can avoid.
Preferably, common are noxious material in water quality detection: chlorine residue, total chlorine, chlorine dioxide；Metal for example arsenic, lead, iron,
Manganese etc., chloride, cyanide etc. and tens kinds of harmful substances such as volatile phenol, the characteristic spectral line that these substances show in water
Within the scope of 360nm~700nm, the detection frequency spectrum of spectrometer is scheduled on 360nm~700nm by the present invention, therefore may be implemented same
When detection water quality detection in tens kinds of Common materials.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of spectrometer provided by the utility model.
Appended drawing reference in Fig. 1 is as follows:
It is 1 light source, 2 first lens, 3 sample cells, 4 second lens, 5 optical filters, 6 slits, 7 first spherical mirrors, 8 gratings, 9 micro-
Lens array, 10 second spherical mirrors, 11 detectors, 12 attenuators, 13 controllers, 14 amplifiers, 15 analog-digital converters, 16 calculate
Machine.
Specific embodiment
The purpose of the utility model is to provide a kind of spectrometers.
In order to make those skilled in the art more fully understand the technical solution of the utility model, with reference to the accompanying drawing and have
The utility model is described in further detail for body embodiment.
Fig. 1 is a kind of structural schematic diagram of spectrometer provided by the utility model.
As shown in Figure 1, the spectrometer includes light source 1, carries out to the light that light source 1 issues in a kind of specific embodiment
First lens 2 of collimation, receive sample cell 3 at the sample cell 3 for receiving the light after the first lens 2 collimation and accommodating sample
The light of reflection and the second lens 4 that it is assembled, to the optical filter 5 being filtered by the second lens 4 aggregation light, permit
Perhaps slit 6 that filtered light passes through receives the light by slit 6 and carries out the first ball that collimation forms directional light to it
Face mirror 7, the grating 8 for receiving directional light, the micro mirror array 9 for receiving the light after 8 diffraction of grating further include receiving through described micro-
The detector 11 of a part of light of directional light is formed after lens array 9 reflects and by the second spherical mirror 10 collimation, is received through institute
State micro mirror array 9 reflect after and the remainder light without second spherical mirror 10 attenuator 12, further include with
The controller 13 that micro mirror array 9 connects, containing each micro mirror in micro mirror array 9 can be embodied sometime in controller 13
The matrix template of state and the Hadamard transform matrix that different modes are carried by matrix template, Hadamard transform matrix pass through control
The rotation that device 13 processed can control micro mirror array 9 makes the shape required in the state and matrix template of each micro mirror in micro mirror array 9
State is consistent, further include connect with detector 11 and to the amplifier 14 of collected signal amplification, receive amplified signal and
It is translated into the analog-digital converter 15 of digital signal, further, digital data transmission is connected to analog-digital converter 15
Computer 16, computer 16 parse Hadamard transform matrix spectral signal can be obtained.
The spectrometer uses Hadamard transform technology, makes electrically driven (operated) micro mirror array 9 using micro electro mechanical system (MEMS) technology, will
Optical path is reflected into two different optical paths respectively.Micro mirror array 9 completes the quick positioning to spectral wavelength as optical modulator.It is micro-
Lens array 9 is run by the controller of Hadamard transform matrix, according to the position of water quality kind tested substance characteristic wavelength spectral line
It sets, the overturning of the compiler control micro mirror array 9 of Hadamard transform matrix.This spectrum positioning method simple and quick can position
Any one or several characteristic spectral lines of water quality parameter.Micro mirror is under different rollover states, detector 11 (i.e. detector)
The signal received, by being decoded the acquisition completed to multi-parameter water-quality characteristic spectrum signal to original encoder matrix.
Specifically, the spectrometer is when in use, comprise the following steps:
Step 1, the light that light source 1 issues penetrates sample after the first lens 2 collimation, then poly- using the second lens 4
Coke passes through optical filter 5 and slit 6；Collimated light beam is formed through the first spherical mirror 7 through the light of slit 6；Collimated light beam impinges upon grating
On 8, light is formed separately by grating 8 by parallel light belt.
Step 2 allows directional light band to impinge upon on micro mirror array 9 by the design of optical path, and the spectral band of each differential has
A corresponding corresponding micro mirror；And each small micro mirror has two states i.e. " -1 " and " 1 ".When micro mirror is in the shape of " 1 "
When state, micro mirror overturns 12 °；When micro mirror state is " -1 ", micro mirror overturns -12 °.The overturning of each micro mirror is in micro mirror array 9
By software control, computer 16 issues overturning instruction to controller 13.The overturning of each micro mirror is in the very short time
What the inside was completed, the overturning of each micro mirror array 9 turns about a few tens of milliseconds time.
Step 3,16 software of computer issue instruction, control the overturning of micro mirror array 9 by controller 13 to select us
It is detected the characteristic spectrum of material demand in water.It is that we need by the light reflected when some micro mirror is in one state
It wants, detector 11 can be reached；, whereas if the state of micro mirror is " -1 ", it is directly entered by the light that micro mirror reflects
Attenuator 11 is without being utilized.
Each micro mirror is the matrix template by software programming, matrix template in state sometime in micro mirror array 9
Program be written to inside the chip of controller, it is each micro- in micro mirror array 9 that controller 13 drives the rotation of micro mirror array 9 to make
The state consistency required in the state and matrix template of mirror.Matrix template is transformation over time, and matrix template becomes
The number changed is also to be set according to our needs, if we need the information of N number of wavelength, with regard to carrying out the change of n times template
It changes.According to the position of tested substance characteristic wavelength spectral line in water quality detection, we design the Hadamard transform of different modes
Matrix, transformation matrix control the overturning of micro mirror array 9 by controller 13.The time of spectra collection is according to different matrixings
Different time be slightly different.
Step 4, the signal acquisition of detector 11.After the collected signal of detector 11 is by amplification, then pass through analog-to-digital
Converter 15, is converted to digital signal.This signal is also to change over time.This signal is that the variation with matrix template is same
Step acquisition, each matrix template can correspond to a digital signal in this way.
Step 5 obtains spectral signal by parsing matrixing.Different micro mirrors have different frequency, so as to one-time detection
The parameter of multiple frequencies.Because each matrix template has the signal of a detector to be corresponding to it, by matrixing
Inverse operation, we can calculate the spectral information of each micro mirror or micro mirror group position.In the water that i.e. we need
The spectral information of content of material.
The Hadamard Transform Spectroscopy technology that the spectrometer uses is the modern digital conversion spectrum technology of a new generation, has light
Many advantages, such as flux is big, and acquisition spectroscopic data point is more, and the spectral information of gained sample is abundant, and scanning speed is fast.Therefore, the light
Spectrometer is provided with above-mentioned advantage；Secondly, the spectrometer can be used for the water quality detection of many kinds of parameters, honourable photometry and photoelectricity are taken into account
The advantages of colorimetric method, not only can quickly be detected, but can many kinds of substance detect simultaneously；In addition, using micro mirror array in the present invention
9, different micro mirrors have different frequency, and so as to the parameter of the multiple frequencies of one-time detection, more than 9 overturnings of micro mirror array constitute different groups
(similar repeatedly to weigh) is closed, and then improves signal-to-noise ratio, i.e. precision；Further, the spectrometer is light, is suitble to portable quick inspection
It surveys；In addition, the setting of attenuator 12, can eliminate unwanted light, light pollution can avoid.
Further, the light source 1 is halogen tungsten lamp light source.
In the specific embodiment, optical filter 5 is bandpass filter, and the optical filter 5 can make frequency range
The light of 360nm-700nm passes through.It common are noxious material in water quality detection: chlorine residue, total chlorine, chlorine dioxide；Metal such as arsenic,
Lead, iron, manganese etc., chloride, cyanide etc. and tens kinds of harmful substances such as volatile phenol, the spy that these substances show in water
Spectral line is levied within the scope of 360nm~700nm, the detection frequency spectrum of spectrometer is scheduled on 360nm~700nm by the present invention, therefore can be with
It realizes while detecting tens kinds of Common materials in water quality detection.
Further, micro mirror array 9 is rearranged by the reflecting mirror of several 16um × 16um.
Further, the detector 11 is the diode silicon photocell of ultraviolet enhancing.
In the specific embodiment, what micro mirror surfaces plated is the film of high reflectance, and the reflecting region of highly reflecting films meets water
Each characteristic spectral line requirement of matter parameter substance detection；In addition, support digital signal input control mode, without adjusting optical path,
The size and scale combined to micro mirror array 9 can be realized to be modified with the difference of coding mode.
Embodiment of above is only the illustrative embodiments of the utility model, is not used in limitation the utility model, this reality
It is defined by the claims with novel protection scope.Essence and protection scope of the those skilled in the art in the utility model
It is interior, the various modifications or equivalent replacements that the utility model is made also are fallen within the protection scope of the present utility model.
Claims (5)
1. a kind of spectrometer, which is characterized in that including light source, to the light source issue light collimated the first lens,
The sample cell of sample is received through the light of first collimated and accommodated, the light after the sample cell reflects is received and is right
Its second lens assembled, to by second lens aggregation light be filtered optical filter, allow to pass through institute
Slit that light after stating optical filter passes through receives the light by the slit and carries out collimation forms directional light the to it
One spherical mirror, the grating for receiving the directional light, the micro mirror array for receiving the light after the optical grating diffraction further include receiving
It is collimated after micro mirror array reflection and by the second spherical mirror and to form the detector of a part of light of directional light, receive warp
After micro mirror array reflection and the remainder light without second spherical mirror attenuator, further include with it is described
The controller of micro mirror array connection, containing each micro mirror can be embodied in the micro mirror array sometime in the controller
State matrix template and by the matrix template carry different modes Hadamard transform matrix, the Hadamard transform
Matrix by the rotation that the controller can control the micro mirror array make in the micro mirror array state of each micro mirror and
The state consistency required in the matrix template further includes the amplification for connecting with the detector and amplifying to collected signal
Device receives amplified signal and is translated into the analog-digital converter of digital signal.
2. spectrometer according to claim 1, which is characterized in that the light source is halogen tungsten lamp light source.
3. spectrometer according to claim 1, which is characterized in that the optical filter is bandpass filter, the optical filter
The light of frequency range 360nm-700nm can be made to pass through.
4. spectrometer according to claim 1, which is characterized in that the micro mirror array by several 16um × 16um reflection
Mirror rearranges.
5. spectrometer according to claim 1, which is characterized in that the detector is the diode silicon photoelectricity of ultraviolet enhancing
Pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821858864.7U CN209542434U (en) | 2018-11-12 | 2018-11-12 | A kind of spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821858864.7U CN209542434U (en) | 2018-11-12 | 2018-11-12 | A kind of spectrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209542434U true CN209542434U (en) | 2019-10-25 |
Family
ID=68248256
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821858864.7U Expired - Fee Related CN209542434U (en) | 2018-11-12 | 2018-11-12 | A kind of spectrometer |
Country Status (1)
| Country | Link |
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| CN (1) | CN209542434U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175424A (en) * | 2020-02-24 | 2020-05-19 | 大连依利特分析仪器有限公司 | Diode array detector based on multi-stage signal calibration and calibration method |
| CN112730293A (en) * | 2020-12-28 | 2021-04-30 | 深圳市中科云驰环境科技有限公司 | Ammonia nitrogen water quality monitor and method based on spectrum analysis method |
-
2018
- 2018-11-12 CN CN201821858864.7U patent/CN209542434U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175424A (en) * | 2020-02-24 | 2020-05-19 | 大连依利特分析仪器有限公司 | Diode array detector based on multi-stage signal calibration and calibration method |
| CN111175424B (en) * | 2020-02-24 | 2022-04-08 | 大连依利特分析仪器有限公司 | Diode array detector based on multi-stage signal calibration and calibration method |
| CN112730293A (en) * | 2020-12-28 | 2021-04-30 | 深圳市中科云驰环境科技有限公司 | Ammonia nitrogen water quality monitor and method based on spectrum analysis method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191025 Termination date: 20211112 |