CN203323874U - Hadamard transformation spectrometer - Google Patents
Hadamard transformation spectrometer Download PDFInfo
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- CN203323874U CN203323874U CN2013203349373U CN201320334937U CN203323874U CN 203323874 U CN203323874 U CN 203323874U CN 2013203349373 U CN2013203349373 U CN 2013203349373U CN 201320334937 U CN201320334937 U CN 201320334937U CN 203323874 U CN203323874 U CN 203323874U
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Abstract
The utility model discloses a Hadamard transformation spectrometer comprising a light machine and a control device. The light machine comprises a sample pool, a light source, a light collecting lens, an entrance slit, a first spherical mirror, an optical grating, a second spherical mirror, a micro-mirror array, a third spherical mirror and a detector. The control device comprises a data collector connected with the detector, a micro-mirror array control device connected with the micro-mirror array, a field programmable gate array connected with both the data collector and the micro-mirror array control device, and a host computer communicating with the field programmable gate array through a network. The utility model overcomes the shortcoming that a conventional digital transformation spectrometer is provided with moving parts and therefore the conventional digital transformation spectrometer is easy to wear and poor in earthquake-proof performance, and the utility model provides the Hadamard transformation spectrometer which is characterized by a not-easy-to-wear property and good earthquake-proof performance.
Description
Technical field
The utility model relates to optical field.Be specially a kind of Hadamard Transform Spectroscopy instrument.
Background technology
At present, the visible spectrum instrument can be divided into two large classes according to its light-dividing principle: a class is the traditional optical light splitting technology, and another kind of is modern digital conversion spectrum technology.The traditional optical light splitting technology has optical filter light splitting, grating beam splitting, diode array to detect and acousto-optic tunable.Modern digital conversion spectrum technology has Fourier transform and Hadamard transform.Modern digital conversion spectrum technology is mainly to adopt Fourier transform to realize the spectral technique of light splitting, it is large that it has a luminous flux, the signal to noise ratio (S/N ratio) of gained spectrogram is high, the advantages such as collection spectroscopic data point is many, and the spectral information of gained sample is abundant, and sweep velocity is fast, but because its interferometer has moving component, therefore, its critical component is easy to wear in motion process, also causes the instrument resistance to shock poor simultaneously.
The utility model content
The technical matters that the utility model solves is to overcome existing digital conversion spectrometer and has also poor shortcoming of moving component thereby easy to wear and shock resistance, and a kind of not easy to wear and Hadamard Transform Spectroscopy instrument that shock resistance is good is provided.
Hadamard Transform Spectroscopy instrument of the present utility model, comprise ray machine and control device, described ray machine comprises for holding the sample cell of sample, irradiate the light source of sample, receive the reflected light of described sample the condenser that it is collimated, the entrance slit that light after allowing to collimate passes through, the light that reception injects from described entrance slit also becomes its collimation the first spherical mirror of directional light, make the grating of described directional light generation diffraction, the light of diffraction is carried out to the second spherical mirror of imaging, receive described imaging and the spectrum of light is carried out to the micro mirror array of optical modulation, the light that the 3rd spherical mirror that light after described micro mirror array modulation is focused on and reception focus on through described the 3rd spherical mirror also converts it into the detecting device into electric signal, described control device comprises the data acquisition unit be connected with described detecting device, the micro mirror array control device be connected with described micro mirror array and the field programmable gate array control device all be connected with the micro mirror array control device with described data acquisition unit.
As preferably, described micro mirror array comprises a plurality of micro mirrors, and the surface of each described micro mirror is coated with aluminium lamination.
As preferably, described Hadamard Transform Spectroscopy instrument also comprises the host computer of communicating by letter with described field programmable gate array control device by network.
Compared to the prior art Hadamard Transform Spectroscopy instrument of the present utility model, has following beneficial effect:
1, Hadamard Transform Spectroscopy instrument of the present utility model is owing to there is no moving component, thereby resistance to shock is good, and structural design is simply small and exquisite.
2, the micro mirror surface is coated with aluminum, and humidity resistance is good.
3, control device also comprises the host computer of communicating by letter with the field programmable gate array control device by network, can realize the Long-distance Control to the Hadamard Transform Spectroscopy instrument, and makes control more convenient.
The accompanying drawing explanation
The structured flowchart of the Hadamard Transform Spectroscopy instrument that Fig. 1 is an embodiment of the utility model.
Embodiment
As shown in Figure 1, the Hadamard Transform Spectroscopy instrument that the utility model provides, comprise ray machine and control device, wherein, described ray machine comprises sample cell, light source, condenser, entrance slit, the first spherical mirror, grating, the second spherical mirror, micro mirror array, the 3rd spherical mirror and detecting device.Wherein, sample cell is for holding sample, and sample generally can be placed in cuvette, cuvette is put into to sample cell and the contrast colors ware is fixedly clamped.Light source is used for irradiating sample, and sample reception is to the light of light source and light is reflected.Condenser receives the reflected light of described sample and it is collimated.Light after collimation is by entrance slit, and entrance slit is used for adjusting purity and the intensity of incident light.The first spherical mirror receives the light injected from described entrance slit and its collimation is become to directional light.Grating makes described directional light generation diffraction, and the light of different wave length is separated.The second spherical mirror is imaged on micro mirror array the light after diffraction, and described micro mirror array comprises a plurality of micro mirrors, and each micro mirror forms a small unit, and in the present embodiment, the surface of each described micro mirror all is coated with aluminium lamination.Each small unit is corresponding with the spectrum of different wave length respectively, and under the control of control device, according to Adama loop coding mode, the spectrum of all wavelengths is carried out optical modulation by micro mirror array.Light after the 3rd spherical mirror is modulated described micro mirror array is focused on, and detecting device receives the light focused on through described the 3rd spherical mirror and also the light signal received transformed into to electric signal.
Described control device comprises micro mirror array control device, data acquisition unit and field programmable gate array control device.Wherein, the micro mirror array control device is connected with micro mirror array, for rotation or the translation of the micro mirror of controlling micro mirror array, thereby makes the spectral separation of different wave length.Data acquisition unit is connected with detecting device, and carry out A/D conversion (analog to digital conversion) and send data to the field programmable gate array control device for receiving after electric signal that detecting device sends will electric signal amplifies, i.e. FPGA control device, as shown in Figure 1.The field programmable gate array control device all is connected with the micro mirror array control device with data acquisition unit.
Control device also comprises the host computer of communicating by letter with the field programmable gate array control device by network, and host computer is PC in the present embodiment, and host computer and field programmable gate array control device can pass through USB serial ports or RS232 serial communication.Host computer can arrange a plurality of interfaces as required, as, instrument calibration interface, sample analysis interface, data management interface, spectrogram or form interface etc.Can realize the various operations of Hadamard transform visible spectrophotometer by the operation to interface.
Hadamard transform is actually the application of weighing design in optics in statistics, n object, and the weight of each object of grouping weighing gained, more accurate than the weight weighed up separately one by one.Therefore, if adopt n Hadamard transform template to be modulated sample signal, can obtain the signal of n modulation.Detect the value of each modulation signal with detecting device, after measuring for n time, can be reduced into the modulation signal recorded for n time by HT the signal of sample.In routine measurement, detecting device only detects the signal intensity of a resolution element in each time interval, and Hadamard transform multi-channel detection technology can detect the total intensity of composite signal in a plurality of resolution elements at one time simultaneously.Under identical experiment condition, after Hadamard transform, the mean square deviation of signal can reduce (n+1)
2Doubly, signal to noise ratio (S/N ratio) can improve (n+l)/2n to/4n
1/2Doubly.While getting n=100, the mean square deviation of signal can reduce 25.5 times, and signal to noise ratio (S/N ratio) can improve 5 times.Therefore, the Hadamard Transform Spectroscopy technology has the advantages such as luminous flux is large, and the signal to noise ratio (S/N ratio) of gained spectrogram is high, and sweep velocity is fast.
Hadamard Transform Spectroscopy instrument of the present utility model is owing to there is no moving component, thereby resistance to shock is good, and structural design is simply small and exquisite.In addition, realize that the micro mirror surface of Hadamard Transform Spectroscopy technology is coated with aluminum, humidity resistance is good.Product adopts photoelectric colorimetry technology based on color light source and the spectral scan technology based on micro mirror array, the long detection of all-wave that can also realize visible ray.
Above embodiment is only exemplary embodiment of the present utility model, is not used in restriction the utility model, and protection domain of the present utility model is defined by the claims.Those skilled in the art in essence of the present utility model and protection domain, various modifications that the utility model is made or be equal to replacement and also drop in protection domain of the present utility model.
Claims (3)
1. a Hadamard Transform Spectroscopy instrument, it is characterized in that: comprise ray machine and control device, described ray machine comprises for holding the sample cell of sample, irradiate the light source of sample, receive the reflected light of described sample the condenser that it is collimated, the entrance slit that light after allowing to collimate passes through, the light that reception injects from described entrance slit also becomes its collimation the first spherical mirror of directional light, make the grating of described directional light generation diffraction, the light of diffraction is carried out to the second spherical mirror of imaging, receive described imaging and the spectrum of light is carried out to the micro mirror array of optical modulation, the light that the 3rd spherical mirror that light after described micro mirror array modulation is focused on and reception focus on through described the 3rd spherical mirror also converts it into the detecting device into electric signal, described control device comprises the data acquisition unit be connected with described detecting device, the micro mirror array control device be connected with described micro mirror array and the field programmable gate array control device all be connected with the micro mirror array control device with described data acquisition unit.
2. Hadamard Transform Spectroscopy instrument according to claim 1, it is characterized in that: described micro mirror array comprises a plurality of micro mirrors, the surface of each described micro mirror is coated with aluminium lamination.
3. according to the described Hadamard Transform Spectroscopy instrument of claim 1 or 2, it is characterized in that: described Hadamard Transform Spectroscopy instrument also comprises the host computer of communicating by letter with described field programmable gate array control device by network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203349373U CN203323874U (en) | 2013-06-09 | 2013-06-09 | Hadamard transformation spectrometer |
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| CN2013203349373U CN203323874U (en) | 2013-06-09 | 2013-06-09 | Hadamard transformation spectrometer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236708A (en) * | 2014-09-29 | 2014-12-24 | 中国科学院光电研究院 | Encoding template device |
| CN106768336A (en) * | 2016-08-26 | 2017-05-31 | 中国科学院寒区旱区环境与工程研究所 | Spectrum imaging system, imaging device and data processing method |
| CN107655570A (en) * | 2017-09-12 | 2018-02-02 | 安徽理工大学 | A kind of synchronous mechanically moving template type Hadamard spectrometers |
| CN108760671A (en) * | 2018-05-29 | 2018-11-06 | 上海贝高医疗科技有限公司 | A kind of breast milk infrared detecting device |
| CN110044481A (en) * | 2019-04-11 | 2019-07-23 | 南昌大学 | A kind of system and method compressing EO-1 hyperion micro-imaging |
| CN114593819A (en) * | 2020-12-07 | 2022-06-07 | 中国科学院长春光学精密机械与物理研究所 | Programmable diffraction grating type Hadamard transform spectrometer |
-
2013
- 2013-06-09 CN CN2013203349373U patent/CN203323874U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236708A (en) * | 2014-09-29 | 2014-12-24 | 中国科学院光电研究院 | Encoding template device |
| CN104236708B (en) * | 2014-09-29 | 2016-08-24 | 中国科学院光电研究院 | A kind of coding templet device |
| CN106768336A (en) * | 2016-08-26 | 2017-05-31 | 中国科学院寒区旱区环境与工程研究所 | Spectrum imaging system, imaging device and data processing method |
| CN106768336B (en) * | 2016-08-26 | 2018-03-23 | 中国科学院寒区旱区环境与工程研究所 | Spectrum imaging system, imaging device and data processing method |
| CN107655570A (en) * | 2017-09-12 | 2018-02-02 | 安徽理工大学 | A kind of synchronous mechanically moving template type Hadamard spectrometers |
| CN107655570B (en) * | 2017-09-12 | 2020-01-10 | 安徽理工大学 | Synchronous mobile mechanical template type Hadamard spectrometer |
| CN108760671A (en) * | 2018-05-29 | 2018-11-06 | 上海贝高医疗科技有限公司 | A kind of breast milk infrared detecting device |
| CN110044481A (en) * | 2019-04-11 | 2019-07-23 | 南昌大学 | A kind of system and method compressing EO-1 hyperion micro-imaging |
| CN110044481B (en) * | 2019-04-11 | 2020-06-16 | 南昌大学 | System and method for compressed hyperspectral microimaging |
| CN114593819A (en) * | 2020-12-07 | 2022-06-07 | 中国科学院长春光学精密机械与物理研究所 | Programmable diffraction grating type Hadamard transform spectrometer |
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| C14 | Grant of patent or utility model | ||
| 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: 20131204 |