CN202956340U - Solution concentration detector based on photonic crystal negative refraction effect - Google Patents
Solution concentration detector based on photonic crystal negative refraction effect Download PDFInfo
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- CN202956340U CN202956340U CN 201220655603 CN201220655603U CN202956340U CN 202956340 U CN202956340 U CN 202956340U CN 201220655603 CN201220655603 CN 201220655603 CN 201220655603 U CN201220655603 U CN 201220655603U CN 202956340 U CN202956340 U CN 202956340U
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Abstract
The utility model relates to a solution concentration detector based on a photonic crystal negative refraction effect. The detector comprises a laser which emits probe laser, a photonic crystal which generates negative refractive light on the outer surface by one-time negative refraction effect of the probe laser through the solution to be tested and carried by the detector, an optical power probe which receives all negative refractive lights and determines negative refractive power, and a calculating part which calculates the refractive index of the solution to be tested according to relative power of incident light emitted by the laser relative to the negative refractive light determined. The solution detector provided by the utility model is simple in structure, small in size, high in measurement precision, quick in response speed, convenient to operate, and stable and reliable in performance, and interference of stray light is effectively reduced.
Description
Technical field
The utility model relates to a kind of detecting device of fast detecting solution concentration, particularly a kind of solution concentration detection device based on the 2 D photon crystal negative refraction.
Background technology
The concept of photonic crystal proposed in 1987 the earliest.Photonic crystal is the micro-dielectric structure material of a kind of periodicity prepared according to the structural symmetry of crystal, and its most basic characteristic has photon band gap exactly.The light that frequency is in photon band gap can not be propagated in photonic crystal.Negative refraction is that Russian scientists Veselago proposed in 1968: when light wave incides the interface with material with negative refractive index from the material with positive refracting power, the refraction of light wave is contrary with conventional refraction, and incident wave and refraction wave are in interface normal direction the same side.Until the beginning of this century, this material with negative index just was produced out.Light there will be negative refraction while propagating in photonic crystal, and the negative refraction of photonic crystal can be affected by some characteristic parameter.Photoelectric device based on photonic crystal has obtained widely research and development recently, and compared to other photoelectric device, it is little that photon crystal device has a volume, is easy to integrated and device and is not subject to the advantages such as external electromagnetic environmental impact.These characteristics provide new application prospect for optoelectronic device to the Highgrade integration development.
The measurement of solution concentration is had a wide range of applications with being controlled in the industries such as papermaking, chemical industry, sugaring, dairy products, pharmacy, beverage, and it is the important technical that guarantees and improve the quality of products.In the context of detection of solution concentration, use osmometry in chemical method at present, the polarimeter method is arranged in physical method, also then the proportion of useful ball float method survey liquid be converted into solution concentration, perhaps use the method for the light absorption principle measurement solution concentration based on Lambert law, but the former needs suitable ball float and high precision weight sensor, and need ball float relatively stable while measuring, the measurement mechanism volume is large, inconvenient operation, the latter only is suitable for measuring transparent or translucent solution, survey bureau is sex-limited large. along with constantly improving and optical fiber technology of physical optics series of theories and experimental study, the development of prism coating technique and photoelectric detecting technology, the method of high-acruracy survey solution concentration has at present: prism surface plasma resonance technology, optical fiber surface plasmon resonance body sensing technology and thin dielectric film strengthen the Gu Sihanxin shift technique. but these technology and method are to take prismatic reflection light as Fundamentals of Measurement, complex structure and volume are larger, be unfavorable for integrated development.
Summary of the invention
The utility model is for many defects of existing solution concentration detector, a kind of novelty is provided, be easy to the integrated solution concentration detection device based on the 2 D photon crystal negative refraction, it is characterized in that: described solution concentration detection device comprises laser instrument, photonic crystal, optical power detecting head and the calculating part be attached thereto, wherein, described laser instrument emission detection light wavelength is 0.8 μ m～1.8 μ m, described photonic crystal is comprised of cylinder silicon body and silicon substrate, cylinder silicon body is ordered in photonic crystal, its diameter is 0.2 μ m～0.35 μ m, the grating constant of hexagonal lattice is 0.22 μ m～0.54 μ m.
In addition, described laser instrument (10) emission detection light wavelength is 1.55 μ m.Described photonic crystal (5) is trapezoidal column structure.Described cylinder silicon body (7) is according to the hexagonal lattice periodic arrangement in photonic crystal (5), and its diameter is 0.2852 μ m.The sensing range of described solution concentration detection device is 0～100%(massfraction).Described optical power detecting head (4) is optical semiconductor power detecting head.The grating constant of described hexagonal lattice is 0.46 μ m.
Further, when surveying light wavelength, be 1.55 μ m, when the diameter of circular silicon post is 0.2852 μ m, Linear Quasi the highest right empirical curve can appear.
The beneficial effects of the utility model:
The solution concentration detection device that the utility model provides is simple in structure, volume is small and exquisite, measuring accuracy is high, fast response time, easy to operate, stable and reliable for performance, be applicable to large-scale integrated, extensive Quick Measurement, in addition, this solution concentration detection device is adjusted complicated detection light path without requiring efforts, do not need artificially to adjust any parts in whole measuring process yet, as long as open light source switch, and, principle based on negative refraction, the refraction direction of light of this solution concentration detection device and the opposite direction of incident light, can effectively reduce the interference problem of parasitic light.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, a kind of solution concentration detection device based on the photonic crystal negative refraction of the utility model is described further
The structural representation that Fig. 1 is the solution concentration detection device in embodiment.
The side structure schematic diagram that Fig. 2 is the photonic crystal in embodiment.
The relation curve of the relative power that Fig. 3 is the refract light in embodiment and solution refractive index to be measured.
The relative power that Fig. 4 is the refract light in embodiment and the relation curve of solution concentration to be measured.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
In order to make the concentration that detecting device can fast detecting solution to be measured, the utility model has adopted following structure:
As shown in Figure 1, 2, the utility model solution concentration detection device comprises: comprise laser instrument 10, photonic crystal 5, optical power detecting head 4 and the calculating part 9 be attached thereto.Wherein, laser instrument 10 can emission wavelength the detection light that is 1.55 μ m.Photonic crystal 5 is the trapezoidal column body structure, be the cylinder silicon body 7 that is 0.2852 μ m by diameter according to the hexagonal lattice periodic arrangement therein, grating constant is 0.46 μ m, whole silicon Cylinder Group by silicon substrate 8 as substrate-loading.This photonic crystal 5 can make described detection light, through its solution to be measured carried, a negative refraction only occur and produce on its outer surface negative refraction light.Optical semiconductor power detecting head 4 can receive all described negative refraction light, and obtains accordingly the relative power (in the incident light sent of laser instrument 10) of described negative refraction light.Calculating part 9 can calculate according to resulting relative power the concentration of corresponding solution to be measured.
Operation steps of the present utility model is as follows:
At first, inject sucrose solution 6 and make the complete submergence cylinder of sucrose solution silicon body 7 in photonic crystal.It should be noted that sucrose solution submergence cylinder silicon body 7 fully, the result obtained like this is more accurate.
Then, laser instrument 10 is surveyed light 1 to Vertical Launch on the plane of incidence of photonic crystal 5, survey light 1 on the oblique side aspect in a left side that arrives photonic crystal 5 with original incident direction through sucrose solution to be measured the time, reflection occurs the part light of utilizing emitted light 1 becomes reflected light 2 away from incident light 1, part light generation negative refraction also reflects this aspect and becomes refract light 3, and the optical semiconductor power detecting head 4 that is positioned at the left end of the oblique side aspect in an above-mentioned left side receives refract light 3 fully and determines the power of this refract light 3 with respect to incident light 1.
Finally, calculating part 9 is calculated the concentration of sucrose solution to be measured according to the relative light power meter of the incident light sent with respect to laser instrument 10 of measured refract light 3 again.
As document 1:BAI Ze-sheng, LIU Zhu-qin, XU Hong. An experienced formula about the connection of refraction index and consistence of several liquid [J]. Journal of Yanan University, 2004,23 (1): the refractive index of the sucrose solution of the 0-60% concentration disclosed in 33-34. and the experimental formula of its concentration relationship.Again again by RSOFT software, draw the relation of the relative power that in the utility model, sucrose solution refractive index to be measured and power detecting head 4 receive by the method for Fdtd Method (FTDT).Corresponding curve as shown in Figure 3, the refractive index that the x axle is sucrose solution to be measured, the relative power that the y axle is the refract light that detects of optical semiconductor power detecting head 4.By above-mentioned two relations, can obtain the utility model refractive optical power in an embodiment and the graph of a relation of sucrose solution concentration to be measured: as shown in Figure 4, surveying light wavelength, be 1.55 μ m, in the situation that the diameter of circular silicon post is 0.2852 μ m, the concentration of sucrose solution to be measured has corresponding graph of relation with the relative power of refract light, wherein, the concentration that the y axle is solution to be measured, the relative power that the x axle is the refract light that detects of optical semiconductor power detecting head 4.Calculating part 9 calculates the concentration of solution to be measured according to this corresponding relation.
Fig. 4 shows, along with the increase of solution concentration to be measured, negative refraction occurs and the relative power of the refract light that produces can manifest the monotonically increasing variation tendency.
The solution concentration detection device that the utility model provides can more accurately be measured the sucrose solution concentration in concentration 0～60% scope in the present embodiment.
Above embodiment is only unrestricted with giving the explanation the technical solution of the utility model, although reference preferably example has been described in detail, the average skilled worker of this area is to be understood that, the technical solution of the utility model is modified or is equal to replacement, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in claim scope of the present utility model.
Claims (8)
1. the solution concentration detection device based on the photonic crystal negative refraction, it is characterized in that: described solution concentration detection device comprises laser instrument (10), photonic crystal (5), optical power detecting head (4) and the calculating part (9) be attached thereto, wherein, described laser instrument (10) emission detection light wavelength is 0.8 μ m～1.8 μ m, described photonic crystal (5) is comprised of cylinder silicon body (7) and silicon substrate (8), cylinder silicon body (7) is ordered in photonic crystal (5), its cylinder silicon body (7) diameter is 0.2 μ m～0.35 μ m, the grating constant of hexagonal lattice is 0.22 μ m～0.54 μ m.
2. a kind of solution concentration detection device based on the photonic crystal negative refraction according to claim 1, it is characterized in that: described laser instrument (10) emission detection light wavelength is 1.55 μ m.
3. a kind of solution concentration detection device based on the photonic crystal negative refraction according to claim 1, it is characterized in that: described photonic crystal (5) is trapezoidal column structure.
4. a kind of solution concentration detection device based on the photonic crystal negative refraction according to claim 1 is characterized in that: described cylinder silicon body (7) according to the hexagonal lattice periodic arrangement in photonic crystal (5).
5. a kind of solution concentration detection device based on the photonic crystal negative refraction according to claim 1, it is characterized in that: the diameter of described cylinder silicon body (7) is 0.2852 μ m.
6. a kind of solution concentration detection device based on the photonic crystal negative refraction according to claim 3, it is characterized in that: the sensing range of the massfraction of described solution concentration detection device is 0～100%.
7. a kind of solution concentration detection device based on the photonic crystal negative refraction according to claim 1, it is characterized in that: described optical power detecting head (4) is optical semiconductor power detecting head.
8. a kind of solution concentration detection device based on the photonic crystal negative refraction according to claim 1, it is characterized in that: the grating constant of described hexagonal lattice is 0.46 μ m.
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| CN 201220655603 CN202956340U (en) | 2012-12-02 | 2012-12-02 | Solution concentration detector based on photonic crystal negative refraction effect |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535197A (en) * | 2018-04-24 | 2018-09-14 | 南京信息工程大学 | A kind of detection device and method of miniature ethanol solution concentration |
| CN108762322A (en) * | 2018-06-05 | 2018-11-06 | 莆田市烛火信息技术有限公司 | A kind of household self-control beverage concentration control apparatus |
| CN110070954A (en) * | 2019-04-01 | 2019-07-30 | 华南师范大学 | A kind of electron beamlet method and electron beamlet device based on Gu Sihanxin displacement |
| CN112129717A (en) * | 2019-06-24 | 2020-12-25 | 南京农业大学 | Visual solution detection device |
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2012
- 2012-12-02 CN CN 201220655603 patent/CN202956340U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535197A (en) * | 2018-04-24 | 2018-09-14 | 南京信息工程大学 | A kind of detection device and method of miniature ethanol solution concentration |
| CN108762322A (en) * | 2018-06-05 | 2018-11-06 | 莆田市烛火信息技术有限公司 | A kind of household self-control beverage concentration control apparatus |
| CN108762322B (en) * | 2018-06-05 | 2020-12-08 | 温州派瑞机械科技有限公司 | Domestic self-made drink concentration control device |
| CN110070954A (en) * | 2019-04-01 | 2019-07-30 | 华南师范大学 | A kind of electron beamlet method and electron beamlet device based on Gu Sihanxin displacement |
| CN112129717A (en) * | 2019-06-24 | 2020-12-25 | 南京农业大学 | Visual solution detection device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 Termination date: 20131202 |