CN101363754A - Simple spectrometer - Google Patents
Simple spectrometer Download PDFInfo
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- CN101363754A CN101363754A CNA2008100718789A CN200810071878A CN101363754A CN 101363754 A CN101363754 A CN 101363754A CN A2008100718789 A CNA2008100718789 A CN A2008100718789A CN 200810071878 A CN200810071878 A CN 200810071878A CN 101363754 A CN101363754 A CN 101363754A
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Abstract
The invention discloses a simple spectrograph, which comprises a set of optical filters and a set of photodetectors. A set of etalons are arranged between the set of optical filters and the set of photodetectors; and the set of etalons are arranged on a fixed etalon bracket which is driven to rotate through a motor. The set of stepped optical filters can conduct the reflection or transmission for light in different wavelength ranges, so that the incident light can be divided into a plurality of spectrum areas. When the motor drives the set of etalons to rotate continuously and uniformly, the light wavelength of each etalon is changed continuously so as to generate a stable and repeated electrooptical signal, which can be detected by the photodetectors. Since the simple spectrograph has low manufacturing cost, can be manufactured in a large scale, and is used for the real-time measurement of fiber communication wavelength, and used for manufacturing Raman spectrometer, and the like.
Description
Technical field the present invention is for relating to optical field, and especially a kind of relating to adopts photodetector to measure transmitted light intensity, to obtain the simple and easy spectrometer of incident light spectral distribution.
The background technology spectrometer has been widely used in the spectral measurement of optics, optical-fibre communications field.Conventional at present spectrometer adopts the optical dispersion element usually, as grating incident light is passed through diffraction, with the light of different wave length with the different angles outgoing, survey the light of different wave length then at the diverse location of array photodetectors, or continuously change light to the grating incident angle, and the emergent light of different wave length is surveyed by specific slit and by range estimation or photodetector successively, these technology reach its maturity at present, be the cost height, price is expensive.
Summary of the invention the object of the invention provides a kind of simple in structure, cheap, adopts photodetector to measure transmitted light intensity, to obtain the simple and easy spectrometer of incident light spectral distribution.
The present invention is by the following technical solutions: spectrometer comprises one group of optical filter, one group of photodetector, correspondence is provided with one group of etalon between one group of optical filter and one group of photodetector, one group of etalon is located on the fixed standard tool support, and fixed standard tool support is rotated by motor driven.
One group of above-mentioned etalon is the ultra thin optical etalon.
The corresponding etalon of above-mentioned fixed standard tool support fixed position is provided with incidence hole and light hole, adopts the light incident of known wavelength, according to resulting wavelength signals etalon is rotated the angle that turns to and demarcates.
One group of above-mentioned optical filter is the stepped ramp type setting, and it is respectively to range of wavelengths lambda〉λ 1, λ λ 2, λ λ 3...... λ the light reflection of λ n, to the transmittance of other wavelength, wherein λ 1＜λ 2＜λ 3＜...＜λ n.
The above-mentioned incident end at one group of optical filter incident light is provided with reference mirror.
Above-mentioned motor output end is provided with power wheel, and it is connected with the power wheel that is provided with on the fixed standard tool support.
The present invention adopts above technical scheme, adopts light reflection or the transmission of one group of stepped ramp type optical filter to different wavelength range, can make incident light be divided into several SPECTRAL REGION; The incidence hole of fixed standard tool support and light hole size make etalon can receive the light of certain ranges of incidence angles, and thin etalon can obtain more wide spectral range; When motor drives one group of etalon and rotates continuously evenly, the light wavelength of each etalon institute outgoing also changes continuously, produce the stable photosignal that repeats, the light of etalon outgoing can be surveyed by photodetector, so detector can obtain periodic signal; Reference mirror can return the former road of incident light part, enters the etalon consistance thereby guarantee to measure light path.Because the etalon material cost is very low, other original paper also is lower cost materials, so this cost of goods manifactured is low, and data processing is also simple, can make on a large scale, is used for carrying out the optical-fibre communications wavelength and measures in real time, and be used for making Raman spectrometer etc.
Description of drawings now is further elaborated the present invention in conjunction with the accompanying drawings:
Fig. 1 is the structural representation of spectrometer of the present invention;
Fig. 2 is the synoptic diagram that the present invention adopts the wavelength signals that the light incident of known wavelength obtains.
Embodiment sees also shown in Figure 1, the present invention includes one group of optical filter 11,12,13 ... 1n, one group of photodetector 31,32,33 ... 3n, one group of optical filter 11,12,13 ... 1n is the stepped ramp type setting, it is respectively to range of wavelengths lambda〉λ 1, λ〉λ 2, λ〉λ 3 ... λ〉the light reflection of λ n, transmittance to other wavelength, wherein λ 1＜λ 2＜λ 3＜...＜λ n can make incident light be divided into several SPECTRAL REGION like this; At one group of optical filter 11,12,13 ... the incident end of 1n incident light can be provided with reference mirror 8, and the former road of incident light part is returned.At one group of optical filter 11,12,13 ... 1n and one group of photodetector 31,32,33 ... correspondence is provided with one group of etalon 21 between the 3n, 22,23 ... 2n, one group of etalon 21,22,23 ... 2n is the ultra thin optical etalon, can obtain more wide spectral range, it is located on the fixed standard tool support 4, fixed standard tool support 4 is driven by motor 5 and rotates, motor 5 output terminals are provided with power wheel 6, its with fixed standard tool support 4 on the power wheel 7 that is provided be connected transmission, when motor 5 is used for driving fixed standard tool support 4 and evenly rotates continuously, each etalon 21,22,23 ... the light wavelength of 2n institute outgoing also changes continuously, produce the emergent light that wavelength period changes, finally obtain periodically variable photosignal, by corresponding photodetector 31,32,33 ... 3n surveys, so photodetector 31,32,33 ... 3n can obtain periodic signal.
Shown in Fig. 1 or 2, fixed standard tool support 4 corresponding etalons 21,22,23 ... the 2n fixed position is provided with incidence hole 411,412,413 ... 41n and light hole 421,422,423 ... 42n, make etalon 21,22,23 ... 2n can receive the light of certain ranges of incidence angles, can adopt the light incident of known wavelength λ i like this, evenly rotate by fixed standard tool support 4, the incident angle variation of light was directly proportional with the time, making the signal time variation be converted into spectral position determines, according to resulting wavelength signals etalon is rotated the angle that turns to and demarcates, photodetector 31,32,33 ... the resulting cyclical signal of 3n can be mapped with the wavelength signals of wavelength X i.Each etalon 21,22,23 ... 2n is resulting to be the spectrogram of a segment limit, with each group etalon 21,22,23 ... the resulting data combination of 2n is got up, and just constitutes the spectral distribution graph of one section big spectral range, thereby realizes the spectrometer function.
Claims (6)
1, a kind of simple and easy spectrometer, it is characterized in that: it comprises one group of optical filter, one group of photodetector, correspondence is provided with one group of etalon between one group of optical filter and one group of photodetector, and one group of etalon is located on the fixed standard tool support, and fixed standard tool support is rotated by motor driven.
2, according to the above a kind of simple and easy spectrometer of claim 1, it is characterized in that: one group etalon is the ultra thin optical etalon.
3, according to claim 1 or 2 the above a kind of simple and easy spectrometers, it is characterized in that: the corresponding etalon of its fixed standard tool support fixed position is provided with incidence hole and light hole, adopt the light incident of known wavelength, according to resulting wavelength signals etalon is rotated the angle that turns to and demarcates.
4, according to claim 1 or 2 the above a kind of simple and easy spectrometers, it is characterized in that: one group optical filter is the stepped ramp type setting, it is respectively to range of wavelengths lambda〉λ 1, λ〉λ 2, λ〉λ 3 ... λ〉the light reflection of λ n, to the transmittance of other wavelength, wherein λ 1＜λ 2＜λ 3＜...＜λ n.
5, according to claim 1 or 2 the above a kind of simple and easy spectrometers, it is characterized in that: its incident end at one group of optical filter incident light is provided with reference mirror.
6, according to claim 1 or 2 the above a kind of simple and easy spectrometers, it is characterized in that: its motor output end is provided with power wheel, and it is connected with the power wheel that is provided with on the fixed standard tool support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100718789A CN101363754A (en) | 2008-10-06 | 2008-10-06 | Simple spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100718789A CN101363754A (en) | 2008-10-06 | 2008-10-06 | Simple spectrometer |
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| Publication Number | Publication Date |
|---|---|
| CN101363754A true CN101363754A (en) | 2009-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100718789A Pending CN101363754A (en) | 2008-10-06 | 2008-10-06 | Simple spectrometer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110075142A1 (en) * | 2009-09-25 | 2011-03-31 | General Electric Company | Optical detection system |
| CN103017904A (en) * | 2012-12-19 | 2013-04-03 | 福州高意光学有限公司 | Miniature spectrometer with adjustable resolution ratio |
| CN107389191A (en) * | 2017-07-05 | 2017-11-24 | 上海理工大学 | A kind of passive spectroanalysis instrument of C-band and its analysis system |
| CN110411953A (en) * | 2018-04-28 | 2019-11-05 | 福州高意光学有限公司 | A kind of high-resolution micro spectrometer |
-
2008
- 2008-10-06 CN CNA2008100718789A patent/CN101363754A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110075142A1 (en) * | 2009-09-25 | 2011-03-31 | General Electric Company | Optical detection system |
| CN103017904A (en) * | 2012-12-19 | 2013-04-03 | 福州高意光学有限公司 | Miniature spectrometer with adjustable resolution ratio |
| CN103017904B (en) * | 2012-12-19 | 2014-11-05 | 福州高意光学有限公司 | Miniature spectrometer with adjustable resolution ratio |
| CN107389191A (en) * | 2017-07-05 | 2017-11-24 | 上海理工大学 | A kind of passive spectroanalysis instrument of C-band and its analysis system |
| CN110411953A (en) * | 2018-04-28 | 2019-11-05 | 福州高意光学有限公司 | A kind of high-resolution micro spectrometer |
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Application publication date: 20090211 |