CN101256242B - Apparatus and method for areflexia object in post-direction stimulated brillouin scattering detecting liquid - Google Patents
Apparatus and method for areflexia object in post-direction stimulated brillouin scattering detecting liquid Download PDFInfo
- Publication number
- CN101256242B CN101256242B CN2008100599879A CN200810059987A CN101256242B CN 101256242 B CN101256242 B CN 101256242B CN 2008100599879 A CN2008100599879 A CN 2008100599879A CN 200810059987 A CN200810059987 A CN 200810059987A CN 101256242 B CN101256242 B CN 101256242B
- Authority
- CN
- China
- Prior art keywords
- laser
- liquid
- brillouin scattering
- stimulated brillouin
- polarization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title abstract description 8
- 206010003084 Areflexia Diseases 0.000 title 1
- 230000010287 polarization Effects 0.000 claims description 43
- 238000001514 detection method Methods 0.000 claims description 23
- 230000003287 optical effect Effects 0.000 claims description 9
- 230000011514 reflex Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000008239 natural water Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000931526 Acer campestre Species 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
Images
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention discloses a device and method for detecting the no reflection objects in liquid using backward stimulated Brillouin scattering. The device comprises a single longitudinal mode laser, reflector M1, 1/2 wave plate, glan prism, faraday 45 degree activizer, reflector M2, divergent lens, convergent lens, liquid cell containing the objects to be detected and photo detector. The laser fromthe single longitudinal mode laser converges in the liquid cell by the above system. When the light intensity of the convergence point reaches to the threshold of the stimulates Brillouin scattering,the backward stimulated Brillouin scattering is generated and returns at the original path, and output at the reflection port of the glan prism and received using the photo detector. When there is object at the laser convergence point in liquid, the laser is blocked and the backward stimulated Brillouin scattering is not generated, therefore there is no signal to output. The presentation of the object in liquid and the depth thereof can be detected by detecting whether there is backward stimulated Brillouin scattering signal or not at different depth of laser converging.
Description
Technical field
The present invention relates to sniffer, relate in particular to the device and method of a kind of back no reflection events object in stimulated Brillouin scattering detection liquid.
Background technology
The classic method of laser acquisition immersed body is that laser is injected in the water, when running into immersed body, because body surface has reflection to a certain degree, survey the time that reflected light returns arrival, Laser Measurement outgoing time and reflected light return the difference of time of arrival, can calculate the degree of depth of determining the object place according to the velocity of propagation of light.Do not have scattering properties but the development of present anti-Detection Techniques makes immersed body have more hidden no reflection events, this method that just makes traditional dependence be detected object self reflection or scattering under water has been subjected to great challenge.The present invention is directed to object under water or under other liquid with reflection characteristic and weak scattering characteristic, in the time of can't surveying with the conventional laser detection method, back when converging at different depth by detection laser in the liquid surveys to the stimulated Brillouin scattering signal whether object exists and the degree of depth at its place.
Summary of the invention
The device and method that the purpose of this invention is to provide a kind of back no reflection events object in stimulated Brillouin scattering detection liquid.
The no reflection events object device that the back is surveyed in the liquid to the laser stimulated Brillouin scattering is to place single longitudinal mode laser, mirror M on same optical axis successively
1, 1/2 wave plate, Glan prism, 45 ° of polarization apparatuss of faraday, mirror M
2, divergent lens, convergent lens, measurand, detector.
The laser wavelength lambda of described single longitudinal mode laser
0Be respectively 1.06 μ m, 532nm or 355nm.
The pulse of single longitudinal mode laser output single longitudinal mode laser, pulse width is 1～100ns, and pulse energy is 10～1000mJ, and laser linewidth is less than 1GHz.
1/2 wave plate is that the mutual vertical polarization components of 1.06 μ m, 532nm or 355nm laser two produce 180 ° phasic difference for wavelength.
Glan prism is two mutual vertical polarization components of 1.06 μ m, 532nm or 355nm laser for wavelength, horizontal polarization light transmission, and orthogonal polarized light reflection.
45 ° of polarization apparatuss of faraday are two mutual vertical polarization components of 1.06 μ m, 532nm or 355nm laser for wavelength, and forward or backwards once by behind the polarization apparatus, the polarization direction is by 45 ° of same direction rotations.
Divergent lens, convergent lens are formed and are dispersed convergence system, and the focal length of divergent lens is-20～-40cm, the focal length of convergent lens is 20～40cm.
The detection method that the no reflection events object in the liquid is surveyed to stimulated Brillouin scattering in the back is the laser that is sent by single longitudinal mode laser, passes through mirror M
1The reflection back sees through 1/2 wave plate, rotates 1/2 wave plate and changes the polarization direction, and light intensity changed after emergent light saw through Glan prism; Light by the Glan prism outgoing rotates 45 ° by 45 ° of polarization apparatus rear polarizer of faraday direction, again by mirror M
2Reflex to the expansion beam convergence system that forms by divergent lens and convergent lens, liquid cell or natural water area, assemble from convergent lens emitting laser bundle; When reaching the threshold value light intensity of stimulated Brillouin scattering of this liquid when the light intensity of convergent point, laser produces the back to stimulated Brillouin scattering in liquid, and rear orientation light returns along former road, once more through expanding after the beam convergence system from mirror M
2Reflection, and, make the polarization direction continue 45 ° of rotations oppositely by 45 ° of polarization apparatuss of faraday, the polarization direction of laser has rotated 90 ° altogether, from the reflex port output of Glan prism, the back scattering laser photodetector receiving optical signals of output, and be converted to electric signal output; When having a no reflection events object on the convergent point at liquid, laser just can't produce the back to stimulated Brillouin scattering in liquid, does not just have electric signal output; Distance between divergent lens in the change expansion beam convergence system and the convergent lens, the laser just different depth in liquid is assembled, corresponding back was to the having or not of brillouin scattering signal when detection laser converged at different depth, just can detect whether immersed body exists and the degree of depth at its place.
The present invention is by changing the distance of divergent lens and convergence, can design the underwater degree of depth of convergent laser easily, simultaneously, directly export from Glan prism to stimulated Brillouin scattering light the back, the photodetector of use general commercial just can detect and have or not object to exist, and does not need special receiving system.Because what detect is the scattering of water or liquid rather than the scattering of testee, even body surface does not have reflected light or scattered light, can there be object to exist by there being the back to differentiate in this degree of depth in the detector to this phenomenon of stimulated Brillouin scattering light electric signal yet.The degree of depth at object place then can be determined by the distance between convergent lens and the divergent lens, this need set up the corresponding relation of convergent point position with convergent lens and divergent lens spacing by optical design, need simultaneously to adjust the distance and demarcate, thereby preset distance between convergent lens and the divergent lens and the relation between the degree of depth of object place by actual measurement.By the distance between automatic focusing device adjusting convergent lens and the divergent lens, reach the underwater degree of depth of scan laser convergent point in the actual device, survey the object in the different depth.
Description of drawings
Fig. 1 is the device synoptic diagram of the no reflection events object of back in stimulated Brillouin scattering detection liquid;
Fig. 2 is the incident laser and the interference ring figure of back to stimulated Brillouin scattering light that obtains with the test of F-P etalon;
Fig. 3 is the additional ring disappearance synoptic diagram that stimulated Brillouin scattering light causes.
Embodiment
As shown in Figure 1, the no reflection events object device of back in laser stimulated Brillouin scattering detection liquid is to place single longitudinal mode laser 1, mirror M on same optical axis successively
12,1/ 22 wave plates 3, Glan prism 4,45 ° of polarization apparatuss 5 of faraday, mirror M
26, divergent lens 7, convergent lens 8, measurand 9, detector 10.
The laser wavelength lambda of described single longitudinal mode laser 1
0Be respectively 1.06 μ m, 532nm or 355nm.Single longitudinal mode laser 1 output single longitudinal mode laser pulse, pulse width is 1～100ns, and pulse energy is 10～1000mJ, and laser linewidth is less than 1GHz.1/2 wave plate 3 is that the mutual vertical polarization components of 1.06 μ m, 532nm or 355nm laser two produce 180 ° phasic difference for wavelength.Glan prism 4 is two mutual vertical polarization components of 1.06 μ m, 532nm or 355nm laser for wavelength, horizontal polarization light transmission, and orthogonal polarized light reflection.45 ° of polarization apparatuss 5 of faraday are two mutual vertical polarization components of 1.06 μ m, 532nm or 355nm laser for wavelength, and forward or backwards once by behind the polarization apparatus, the polarization direction is by 45 ° of same direction rotations.Divergent lens 7, convergent lens 8 formed and dispersed convergence system, and the focal length of divergent lens 7 is-20～-40cm, the focal length of convergent lens 8 is 20～40cm.
The detection method of the no reflection events object of back in stimulated Brillouin scattering detection liquid is based on the principle of the stimulated Brillouin scattering of laser in liquid.When laser convergence is in liquid, because laser intensity has surpassed liquid Brillouin scattering threshold value, produce back scattering, the back has certain variation to the frequency of stimulated Brillouin scattering light with respect to incident laser, produces frequency displacement,
The back is to stimulated Brillouin scattering frequency displacement Δ v
BCan calculate by following formula:
Wherein n is the refractive index of this wavelength laser in liquid, V
SondBe sound's velocity in liquid, λ
0It is light wavelength in a vacuum.
Utilize the F-P etalon can see that the multiple-beam interference ring after the frequency displacement and the ring diameter of former incident light change.Differentiating this light by the frequency displacement of observing rear orientation light is stimulated Brillouin scattering light in the liquid really.Fig. 2 is the incident laser and the interference ring figure of back to stimulated Brillouin scattering light that obtains with the test of F-P etalon.
The detection method that the no reflection events object in the liquid is surveyed to stimulated Brillouin scattering in the back is the laser that is sent by single longitudinal mode laser 1, passes through mirror M
12 reflection backs see through 1/2 wave plate 3, rotate 1/2 wave plate and change the polarization direction, and light intensity changed after emergent light saw through Glan prism; Light by Glan prism 4 outgoing rotates 45 ° by 45 ° of polarization apparatuss of faraday, 5 rear polarizer directions, again by mirror M
26 reflex to the expansion beam convergence system that is made up of divergent lens 7 and convergent lens 8, assemble liquid cell 9 or natural water area from convergent lens emitting laser bundle; When reaching the threshold value light intensity of stimulated Brillouin scattering of this liquid when the light intensity of convergent point, laser produces the back to stimulated Brillouin scattering in liquid, and rear orientation light returns along former road, once more through expanding after the beam convergence system from mirror M
2Reflection, and, make the polarization direction continue 45 ° of rotations oppositely by 45 ° of polarization apparatuss of faraday, the polarization direction of laser has rotated 90 ° altogether, from the reflex port output of Glan prism, the back scattering laser of output photodetector 10 receiving optical signals, and be converted to electric signal output; When having a no reflection events object on the convergent point at liquid, laser just can't produce the back to stimulated Brillouin scattering in liquid, does not just have electric signal output; Distance between divergent lens in the change expansion beam convergence system and the convergent lens, the laser just different depth in liquid is assembled, corresponding back was to the having or not of brillouin scattering signal when detection laser converged at different depth, just can detect whether immersed body exists and the degree of depth at its place.
The method of utilizing the no reflection events object of back in stimulated Brillouin scattering detection liquid provided by the invention, because what detect is the scattering of water or liquid rather than the scattering of testee, even object does not have reflected light, also can differentiate in this degree of depth to stimulated Brillouin scattering less than the back by detection has object to exist.The degree of depth of object in liquid can be determined by the distance between the converging and diverging lens simultaneously, and the relation between this distance and the degree of depth can be established in advance by demarcation.Thereby can detect the degree of depth of object in liquid rapidly efficiently.
Embodiment:
As shown in Figure 1, single longitudinal mode laser output single longitudinal mode pulse laser,
Experiment parameter is as follows:
Optical maser wavelength=532.201nm
Pulse width=5ns
Live width＜1GHz
Pulse energy is variable in 20mJ～250mJ
Absorption absorption coefficient=0.01～the 0.05/cm of this wavelength in water
The stimulated Brillouin scattering gain coefficient is=0.0048cm/MW
Divergent lens (7) focal length=-20～-40cm
Convergent lens (8) focal length=10～30cm
Distance=10～20cm between divergent lens and the convergent lens
Medium is a water, refractive index=1.52 of 532nm laser in water
Laser beam is focused in the liquid cell, in the water of the degree of depth=10m～20m.
The emitted laser bundle passes through mirror M
1See through 1/2 wave plate, Glan prism, 45 ° of polarization apparatuss of faraday after the reflection successively, by mirror M
2Reflex to the expansion beam convergence system that forms by divergent lens and convergent lens, the pond, assemble from convergent lens emitting laser bundle.When reaching the threshold value light intensity of stimulated Brillouin scattering of water when the light intensity of convergent point, laser produces the back to stimulated Brillouin scattering in water, and rear orientation light returns along former road, once more through expanding after the beam convergence system from mirror M
2Reflect, and oppositely by 45 ° of polarization apparatuss of faraday, because the forward and reverse secondary of laser beam passes through 45 ° of polarization apparatuss of faraday, the polarization direction of laser has rotated 90 ° altogether, therefore exported from the reflex port of Glan prism.
The input optical pulse energy is when 50mJ in the experiment, observed the rear orientation light of stimulated Brillouin scattering, and, can see the frequency displacement that causes by stimulated Brillouin scattering light with the observation of F-P etalon, what demonstrate in Fig. 2 is that more weak additional ring of close bright ring.
If place the object of a no reflection events characteristic on the convergent point position in water, laser also can't produce the back to stimulated Brillouin scattering both not from the light of body surface reflection in liquid, and just do not have signal output at the Glan prism output terminal this moment.Observe with the F-P etalon, can see that the additional ring that is caused by stimulated Brillouin scattering light disappears, as shown in Figure 3.
Distance the time, laser is just assembled in the different depth in liquid between divergent lens in change expanding the beam convergence system and the convergent lens.Corresponding back was to the having or not of brillouin scattering signal when detection laser converged at different depth, just can detect whether immersed body exists and the degree of depth at its place.
Testee is in water 10～20 meters in the present embodiment, and needing laser energy is that 50～250 millis are burnt.
Claims (8)
1. survey no reflection events object device in the liquid to the laser stimulated Brillouin scattering after one kind, it is characterized in that on same optical axis, placing successively single longitudinal mode laser (1), mirror M
1(2), 1/2 wave plate (3), Glan prism (4), 45 ° of polarization apparatuss of faraday (5), mirror M
2(6), divergent lens (7), convergent lens (8), measurand (9), the reflex port of Glan prism (4) and photodetector (10) join.
2. no reflection events object device in the liquid is surveyed to the laser stimulated Brillouin scattering in a kind of back according to claim 1, it is characterized in that the laser wavelength lambda of described single longitudinal mode laser (1)
0Be respectively 1.06 μ m, 532nm or 355nm.
3. the no reflection events object device of a kind of back according to claim 1 in laser stimulated Brillouin scattering detection liquid, it is characterized in that the pulse of described single longitudinal mode laser (1) output single longitudinal mode laser, pulse width is 1～100ns, pulse energy is 10～1000mJ, and laser linewidth is less than 1GHz.
4. no reflection events object device in the liquid is surveyed to the laser stimulated Brillouin scattering in a kind of back according to claim 1, it is characterized in that described 1/2 wave plate (3) is that two mutual vertical polarization components of 1.06 μ m, 532nm or 355nm laser produce 180 ° phasic difference for wavelength.
5. the no reflection events object device of a kind of back according to claim 1 in laser stimulated Brillouin scattering detection liquid, it is characterized in that described Glan prism (4) is two mutual vertical polarization components of 1.06 μ m, 532nm or 355nm laser for wavelength, horizontal polarization light transmission, and orthogonal polarized light reflection.
6. the no reflection events object device of a kind of back according to claim 1 in laser stimulated Brillouin scattering detection liquid, it is characterized in that 45 ° of polarization apparatuss of described faraday (5), for wavelength is two mutual vertical polarization components of 1.06 μ m, 532nm or 355nm laser, once by behind the polarization apparatus, the polarization direction is by 45 ° of same direction rotations forward or backwards.
7. the no reflection events object device of a kind of back according to claim 1 in laser stimulated Brillouin scattering detection liquid, it is characterized in that described divergent lens (7), convergent lens (8) are formed disperses convergence system, the focal length of divergent lens (7) is-20～-40cm, the focal length of convergent lens (8) is 20～40cm.
8. what a use was installed according to claim 1 afterwards surveys the detection method of the no reflection events object in the liquid to stimulated Brillouin scattering, it is characterized in that described measurand (9) is liquid cell, and the laser by single longitudinal mode laser (1) sends passes through mirror M
1(2) the reflection back sees through 1/2 wave plate (3), rotates 1/2 wave plate and changes the polarization direction, and light intensity changed after emergent light saw through Glan prism; Light by Glan prism (4) outgoing rotates 45 ° by 45 ° of polarization apparatuss of faraday (5) rear polarizer direction, again by mirror M
2(6) reflex to the expansion beam convergence system that forms by divergent lens (7) and convergent lens (8), liquid cell or natural water area, assemble from convergent lens emitting laser bundle; When reaching the threshold value light intensity of stimulated Brillouin scattering of this liquid when the light intensity of convergent point, laser produces the back to stimulated Brillouin scattering in liquid, and rear orientation light returns along former road, once more through expanding after the beam convergence system from mirror M
2Reflection, and, make the polarization direction continue 45 ° of rotations oppositely by 45 ° of polarization apparatuss of faraday, the polarization direction of laser has rotated 90 ° altogether, from the reflex port output of Glan prism, the back scattering laser of output photodetector (10) receiving optical signals, and be converted to electric signal output; When having a no reflection events object on the convergent point at liquid, laser just can't produce the back to stimulated Brillouin scattering in liquid, does not just have electric signal output; Distance between divergent lens in the change expansion beam convergence system and the convergent lens, the laser just different depth in liquid is assembled, corresponding back was to the having or not of brillouin scattering signal when detection laser converged at different depth, just can detect whether immersed body exists and the degree of depth at its place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100599879A CN101256242B (en) | 2008-03-07 | 2008-03-07 | Apparatus and method for areflexia object in post-direction stimulated brillouin scattering detecting liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100599879A CN101256242B (en) | 2008-03-07 | 2008-03-07 | Apparatus and method for areflexia object in post-direction stimulated brillouin scattering detecting liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101256242A CN101256242A (en) | 2008-09-03 |
| CN101256242B true CN101256242B (en) | 2010-06-16 |
Family
ID=39891201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100599879A Expired - Fee Related CN101256242B (en) | 2008-03-07 | 2008-03-07 | Apparatus and method for areflexia object in post-direction stimulated brillouin scattering detecting liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101256242B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8487235B2 (en) * | 2009-04-13 | 2013-07-16 | Rockwell Automation Technologies, Inc. | Photoelectric sensor for sensing a target at a predetermined location |
| CN102087453B (en) * | 2010-12-13 | 2013-10-23 | 华北电力大学（保定） | Device and method for suppressing stimulated Brillouin scattering based on magneto-optical effect |
| CN102243307A (en) * | 2011-04-13 | 2011-11-16 | 南昌航空大学 | Underwater detection automatic scanning system of SBS (Stimulated Brillouin Scattering) laser radar |
| CN104568846B (en) * | 2015-01-15 | 2017-02-22 | 南昌航空大学 | Two-dimensional scan detection method for sea water halocline based on brillouin scattering |
| CN105044730B (en) * | 2015-06-30 | 2018-10-16 | 北京师范大学 | Rayleigh scattering Oceanic Lidar System |
| CN106773072A (en) * | 2016-12-13 | 2017-05-31 | 中国科学院光电研究院 | The detection means of laser shaping system and laser shaping system |
| CN108827162B (en) * | 2018-09-10 | 2023-08-18 | 中国计量大学 | Device and method for comparing linearity of Fabry-Perot etalon micro-displacement measurement system based on capacitance sensor |
| CN109000567B (en) * | 2018-10-22 | 2023-08-18 | 中国计量大学 | Linearity comparison device and method of Fabry-Perot etalon micro-displacement measurement system based on PSD |
-
2008
- 2008-03-07 CN CN2008100599879A patent/CN101256242B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101256242A (en) | 2008-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101256242B (en) | Apparatus and method for areflexia object in post-direction stimulated brillouin scattering detecting liquid | |
| US9476980B2 (en) | Remote measurement of shallow depths in semi-transparent media | |
| CN105785341A (en) | Novel dual-channel laser radar receiving system for enhancing echo dynamic range | |
| CN102012529B (en) | System and method for detecting target back trace in water based on laser pulse back scattering | |
| CN110673157B (en) | High spectral resolution laser radar system for detecting ocean optical parameters | |
| CN103842782A (en) | Distributed optical fiber sound wave detection device | |
| CN205809286U (en) | The Novel double-channel laser radar improving echo dynamic range receives system | |
| CN102707331B (en) | Receiving and transmitting integrated sub-nanosecond pulse laser detection system based on polarization | |
| CN102169050A (en) | Method for comprehensively measuring reflectivity | |
| CN105372641A (en) | Laser radar water body echo signal simulation method | |
| CN100374875C (en) | Multi-purpose laser altimeter measuring device | |
| CN108717194A (en) | One species complex Doppler anemometry laser radar | |
| CN101614820A (en) | A kind of signal enhancement laser radar system based on modified F-P etalon | |
| CN100554943C (en) | Method with the pulsed laser real time measurement sea water opacity | |
| CN103175629A (en) | Method for fast measuring sea water temperature | |
| Banakh et al. | Lidar measurements of atmospheric backscattering amplification | |
| CN106773072A (en) | The detection means of laser shaping system and laser shaping system | |
| EP2405287A1 (en) | Device for remote laser detection and interferometry method | |
| CN112904308B (en) | Laser radar system and method for detecting cloud phase state and cloud water content | |
| Farrant et al. | Opto-acoustic underwater remote sensing (OAURS)-an optical sonar? | |
| JPH034147A (en) | Gas detecting device | |
| CN113447232A (en) | Wake flow detection device for time-dependent single photon counting and operation method thereof | |
| Tulldahl et al. | Lidar for shallow underwater target detection | |
| Wei et al. | Design of three-channel optical receiving system for dual-frequency laser radar | |
| Hu et al. | Coherent detection of backscattered polarized laser with polarization diversity reception |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100616 Termination date: 20140307 |