CN103163529A - Distance measuring system based on pseudo thermal light second-order relevance - Google Patents
Distance measuring system based on pseudo thermal light second-order relevance Download PDFInfo
- Publication number
- CN103163529A CN103163529A CN2013101011795A CN201310101179A CN103163529A CN 103163529 A CN103163529 A CN 103163529A CN 2013101011795 A CN2013101011795 A CN 2013101011795A CN 201310101179 A CN201310101179 A CN 201310101179A CN 103163529 A CN103163529 A CN 103163529A
- Authority
- CN
- China
- Prior art keywords
- counterfeit
- time
- optical
- system based
- thermo
- 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.)
- Granted
Links
Images
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention discloses a distance measuring system based on pseudo thermal light second-order relevance. The distance measuring system based on the pseudo thermal light second-order relevance comprises a pseudo thermal light source, a beam splitter, a detection module, a transmitting device, a receiving device and a distance measuring module, wherein the distance measuring module measures distance by using a distance measuring method in accordance with measurement and curve fitting. The distance measuring system based on the pseudo thermal light second-order relevance has the characteristics of high accuracy and high environmental interference resistance, remote and high-accuracy distance measurement can be realized, and measurement dead zones are eliminated.
Description
Technical field
The present invention relates to the related range measurement system of a kind of continuous light, relate in particular to a kind of range measurement system based on counterfeit thermo-optical double velocity correlation.
Background technology
The related range finding of continuous light is based on continuous light ranging technology and corresponding technology, has acted on the characteristics such as laser ranging monochromaticity goes with coherence, high directivity, and has had the characteristic of the anti-environmental interference of corresponding technology.The related range finding of common continuous light comprises ranging phase method, pseudo-random code ranging, interfere type range finding and chaos laser range-measurement.
Laser Range Finding Based on Phase come and go to be propagated the phase place that produces and is changed and come the measured signal travel-time indirectly by measuring continuous modulation signal on testing distance, thereby tries to achieve tested distance.The Laser Range Finding Based on Phase system is the frequency with radio wave band, laser beam is carried out amplitude modulation(PAM) and measures light modulated coming and going the phase delay that survey line once produces, again according to the modulation light wavelength, the convert distance of this phase delay representative namely determines laser with indirect method and comes and goes the required time of target.Ranging phase method has high-precision specific, generally can reach millimetre-sized precision, but because phase place has cyclophysis, so Laser Range Finding Based on Phase is not suitable for surveying at a distance.
The pseudo-random code laser ranging is that pseudo-random code is modulated in the amplitude variation of laser by amplitude modulator, then at receiving end, echoed signal and local reference signal is directly carried out related operation, obtains the travel-time and convert obtaining distance.Its distance accuracy is by the decision of pseudo-random code spreading rate, and namely spreading rate is higher, and distance accuracy is higher.Yet randomizer at a high speed generally is difficult to surpass the speed of 1Gbps, so more than the pseudo-random code precision of laser ranging generally is limited in 10cm.
The interfere type range finding is also a kind of ranging phase method in principle, but it is not the phase differential by the measurement laser modulation signal, but the phase place superposition relation (interference) of the light wave of measurement non-modulated itself is found range.Because light wavelength is extremely short. particularly the monochromaticity of laser is high, and its wavelength value is very accurate, so utilize the resolution of interferometric method range finding to be at least half-wavelength, precision is micron order, and the interferometric method range finding has the high characteristic of precision.But the interferometric method range finding can only be measured relative distance, carry out absolute interferometry in long distance, and the discriminating of ambiguity is extremely important but very difficult, so the interferometric method range finding is not suitable for the range finding of long distance.
Chaos laser range-measurement originates from and utilizes the thin sharp class impulse function characteristic of chaotic signal correlation curve, at first the people such as K.Myneni propose to utilize the research of finding range of chaotic laser light pulse train in calendar year 2001, they utilize chaotic laser light pulse train that the light feedback semiconductor laser produces to realize the range observation of target, but the limit bandwidth of detectable signal its distance accuracy.Pass through subsequently scholar's large quantity research, obtain at present the distance accuracy of 6cm aspect chaotic distance-testing.
Therefore, those skilled in the art is devoted to develop and a kind ofly can realizes remote, high-precision range measurement system.
Summary of the invention
Because the defects of prior art, technical matters to be solved by this invention is to provide and a kind ofly can realizes remote, high-precision range measurement system.The present invention proposes a kind of range measurement system based on counterfeit thermo-optical double velocity correlation.Compare with existing continuous light ranging technology, the range measurement system based on counterfeit thermo-optical double velocity correlation that the present invention proposes has very large advantage, theoretical formula due to the double velocity correlation curve that can calculate counterfeit thermo-optical field has adopted the method for curve can greatly promote its precision; Secondly because counterfeit thermo-optical field double velocity correlation curve has unimodal characteristic, there is not the dead band of any measurement in it; Due to the mode that adopts single photon detection and correlation measurement, this system has good anti-environmental interference characteristic for neighbourhood noise at last.
The object of the invention is to propose a kind of brand-new range measurement system based on counterfeit thermo-optical double velocity correlation for the blank of using counterfeit thermo-optical range finding the high precision that this system has, without blind area and environmental interference resistance.
For achieving the above object, the technical solution used in the present invention is as follows:
The invention provides a kind of range measurement system based on counterfeit thermo-optical double velocity correlation, comprise counterfeit thermal light source module, beam splitter, detecting module, emitter, receiving trap and range finder module, described detecting module comprises detector 1, detector 2, wherein, described counterfeit thermal light source module is sent light beam, described light beam is divided into two-way through described beam splitter, wherein one the tunnel is received by described detector 1; Lead up in addition described emitter collimator and extender and shine target object, the reflection echo light beam of described target object is received by described receiving trap, and is input to described detector 2; The photoimpact of described detector 1 output reference signal, the photoimpact of described detector 2 output measuring-signals, the photoimpact of described reference signal and the photoimpact of measuring-signal are sent to described range finder module, the distance of the relatively described range measurement system of the described range finder module described target object of output.
Wherein, described range finder module adopts coincidence measurement algorithm and curve fitting algorithm, described coincidence measurement algorithm carries out the burst coincidence counting with the output of described detector 1 and described detector 2 and obtains the sample point of counterfeit thermo-optical double velocity correlation curve, the theoretical formula of described curve fitting algorithm by counterfeit thermo-optical field becomes a smooth curve with a series of sample point matches that obtain of described coincidence measurement algorithm, and export the distance of the relatively described range measurement system of described target object, significantly promote the precision of this range measurement system by described curve fitting algorithm.Preferably, described sample point is 2000 sample points.
Further, the time of the described range finder module of the photoimpact of the photoimpact of described reference signal and measuring-signal arrival is respectively t
1And t
2, described distance is L, can be expressed as:
C is the speed that light is propagated.
Further, described counterfeit thermal light source module comprises adjustable attenuator, lens, frosted glass, pin hole; Send continuous laser by the wavelength semiconductor laser that is 780nm and at first pass through described adjustable attenuator, then pass through described lens, converge to the surface of described frosted glass, described frosted glass rotates, laser produces counterfeit thermo-optical by the frosted glass of described rotation, and described counterfeit thermo-optical is by described pin hole output, the implementation space filtering of described pin hole, make described counterfeit thermo-optical have later on identical spatial character by described pin hole, to reduce the impact of space correlation on time correlation.
Further, the frosted glass of described rotation regulates by motor driving the rotational angular velocity that described motor rotary speed can change described frosted glass, thereby accelerates or reduce the linear velocity at hot spot place, frosted glass surface.
Further, described detecting module also comprises the device that light beam is carried out filtering and coupling, the device of described filtering and coupling has two-way, described counterfeit thermal light source module is sent light beam, described light beam is divided into two-way through described beam splitter, wherein one the tunnel is received by described detector 1 through a road in described filtering and coupling device; Lead up in addition described emitter collimator and extender and shine target object, described target object reflection echo light beam is received by described receiving trap, and is input to described detector 2 through another road in described filtering and coupling device; The output of described detector 1 is as the reference signal, and the output of described detector 2 is as measuring-signal.
A step ground more, in order to reduce background radiation to the impact of result of detection, it is 780 ± 2nm that the device of described filtering and coupling has adopted centre wavelength, and bandwidth is 10 ± 2nm, and peak transmittance is minimum is that 50% narrow-band interference filter plate carries out filtering.
Further, described detecting module also comprises high speed acquisition circuit, and the photoimpact that described detector 1 and 2 output are recorded the photoimpact of described reference signal and measuring-signal through described high speed acquisition circuit arrives the time of described range finder module.
Further, described high speed acquisition circuit temporal resolution is 1ps.
Further, described coincidence measurement algorithm is for adding time-delay τ on each label value in measuring-signal time series label
0+ i τ, choose the time tag sequence of reference signal as benchmark, as the mid point of a time interval, and the length of time interval is and meets gate-width with reference to each time tag in the signal time sequence label, and search has time-delay τ in the time interval of each reference signal
0The time tag of the measuring-signal of+i τ, if there is the time tag of measuring-signal to fall in the interval, note meets number and adds one; After having searched for all time tags in signal road, namely obtain the τ that delays time
0Meet several n (τ) under+i τ, and according to equation
Calculate this time-delay τ
0Normalized time second order coherence function g under+i τ
(2)(τ), complete and once meet calculating, namely obtain a sample point, adjust the value of i, calculate all sample points.
Further, τ wherein
0For measuring starting point, value-4us, i are the sample point number, i:0～1999, τ value 4ns.
Further, the described counterfeit thermo-optical field theory formula of described curve fitting algorithm employing is:
In formula, f is described counterfeit thermo-optical and coherent states field light intensity ratio, and p is the live width parameter of described counterfeit thermo-optical, and q is described coherent light live width parameter; Δ τ is the position of double velocity correlation peak of function, and τ is function variable, dependent variable g
(2)(τ) the different values according to time delay τ have different values.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand fully purpose of the present invention, feature and effect.
Description of drawings
Fig. 1 is the structural representation based on the range measurement system of counterfeit thermo-optical double velocity correlation of a preferred embodiment of the present invention.
Fig. 2 is the structural representation based on the range measurement system of counterfeit thermo-optical double velocity correlation of another preferred embodiment of the present invention.
Embodiment
As shown in Figure 1, in a preferred embodiment of the present invention, range measurement system based on counterfeit thermo-optical double velocity correlation comprises counterfeit thermal light source module, beam splitter, detecting module, emitter, receiving trap and range finder module, described detecting module comprises detector 1, detector 2, wherein, described counterfeit thermal light source module is sent light beam, and described light beam is divided into two-way through described beam splitter, wherein one the tunnel is received by described detector 1; Lead up in addition described emitter collimator and extender and shine target object, described target object reflection echo light beam is received by described receiving trap, and is input to described detector 2; The output of described detector 1 is as reference signal photon, the output of described detector 2 is as the measuring-signal photon, the output of the output of described detector 1 and described detector 2 is sent to described range finder module, the distance of the relatively described range measurement system of the described range finder module described target object of output.
In the present embodiment, the coincidence measurement algorithm thinking of range finder module is: add certain time-delay τ in one tunnel time series label on each label value, choose other one tunnel time tag sequence as benchmark, as the mid point of a time interval, and the length of time interval is and meets gate-width with each time tag wherein.Search has the time tag on that road of time-delay τ in each time interval, if free label falls in the interval, note meets number and adds one.After having searched for all time tags in signal road, namely obtain meeting several n (τ) under certain time-delay τ, and according to equation
Calculate normalized time second order coherence function g under this time-delay τ
(2)(τ), complete and once meet calculating.Adjustment time-delay τ recomputates and meets number, re-starts to meet calculating, until satisfy the required sample points of curve.
Adopt curve fitting algorithm calculate the corresponding amount of delay Δ of peak value τ by, the rotation formed counterfeit thermo-optical of frosted glass field has following double velocity correlation function expression:
In formula, f is thermo-optical and coherent states field light intensity ratio, and p is thermo-optical live width parameter, and q is coherent light live width parameter; Δ τ is the position of double velocity correlation peak of function; Select following formula as treating fitting function, according to meeting the resulting discrete sample point of algorithm, pass through fitting algorithm, can simulate the value of amount of delay Δ τ, adopt the data fitting algorithm, the temporal resolution that the final resolution of system can be approached the front end single-photon detector has significantly improved system performance.
As shown in Figure 2, wherein, described counterfeit thermal light source module comprises adjustable attenuator, lens, frosted glass, pin hole; Send continuous laser by the wavelength semiconductor laser that is 780nm and at first pass through described adjustable attenuator, then pass through described lens, converge to the surface of described frosted glass, described frosted glass rotates, laser beam produces counterfeit thermo-optical by the frosted glass of described rotation, and described counterfeit thermo-optical is by described pin hole output, the implementation space filtering of described pin hole, make described counterfeit thermo-optical have later on identical spatial character by described pin hole, to reduce the impact of space correlation on time correlation.It is the continuous laser of 780nm that laser instrument is selected wavelength, is converged to accurately on the frosted glass of High Rotation Speed by one group of lens after overdamping and obtains needed counterfeit thermo-optical.The radius of wherein choosing frosted glass is 9cm, its rotating speed 10 revolution per seconds.Subsequently, the counterfeit thermo-optical that produces is through after being placed on the pin hole of frosted glass back, beam splitter by a 50:50 is divided into measuring-signal photon and reference signal photon two-way with light beam, and respectively it is coupled in Transmission Fibers, utilization is collected the two-way photon with the single-photon detector of optical fiber pigtail, and recording two-way photon time of arrival by the high speed acquisition circuit that temporal resolution is 1ps, the time series of generation is transferred to range finder module, and calculates distance according to algorithm.in the present embodiment, in order to reduce background radiation to the impact of result of detection, having adopted centre wavelength is 780 ± 2nm, bandwidth is 10 ± 2nm, peak transmittance is minimum is that 50% narrow-band interference filter plate carries out filtering, should guarantee that for obtaining best filter effect flashlight impinges perpendicularly on the narrow band filter slice surface, when if incident light incides the optical filter surface with the angle of deflection, can cause the corresponding wavelength of filter plate transmissivity peak value to move to short wavelength's direction, and the shape of transmission wave band can change, obviously, peak wavelength significantly change and the distortion meeting of passband shapes causes that transmitance obviously descends in former the design's free transmission range.
More than describe preferred embodiment of the present invention in detail.The ordinary skill that should be appreciated that this area need not creative work and just can design according to the present invention make many modifications and variations.Therefore, all technician in the art all should be in claim protection domain of the present invention under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. range measurement system based on counterfeit thermo-optical double velocity correlation, comprise counterfeit thermal light source module, beam splitter, detecting module, emitter, receiving trap and range finder module, described detecting module comprises detector (1), detector (2), wherein, described counterfeit thermal light source module is sent light beam, described light beam is divided into two-way through described beam splitter, wherein one the tunnel is received by described detector (1); Lead up in addition described emitter collimator and extender and shine target object, the reflection echo light beam of described target object is received by described receiving trap, and is input to described detector (2); The photoimpact of described detector (1) output reference signal, the photoimpact of described detector (2) output measuring-signal, the photoimpact of described reference signal and the photoimpact of measuring-signal are sent to described range finder module, the distance of the relatively described range measurement system of the described range finder module described target object of output.
2. a kind of range measurement system based on counterfeit thermo-optical double velocity correlation according to claim 1, it is characterized in that, described range finder module adopts coincidence measurement algorithm and curve fitting algorithm, described coincidence measurement algorithm carries out the burst coincidence counting with the output of described detector (1) and described detector (2) and obtains the sample point of counterfeit thermo-optical double velocity correlation curve, the theoretical formula of described curve fitting algorithm by counterfeit thermo-optical field becomes a smooth curve with a series of sample point matches that obtain of described coincidence measurement algorithm, and export the distance of the relatively described range measurement system of described target object.
3. a kind of range measurement system based on counterfeit thermo-optical double velocity correlation according to claim 1, is characterized in that, the time that the photoimpact of described reference signal and the photoimpact of measuring-signal arrive described range finder module is respectively t
1And t
2, described distance is L, can be expressed as:
C is the speed that light is propagated.
4. a kind of range measurement system based on counterfeit thermo-optical double velocity correlation according to claim 1, is characterized in that, described counterfeit thermal light source module comprises adjustable attenuator, lens, frosted glass, pin hole; Send continuous laser by the wavelength semiconductor laser that is 780nm and at first pass through described adjustable attenuator, then pass through described lens, converge to the surface of described frosted glass, described frosted glass rotates, laser produces counterfeit thermo-optical by the frosted glass of described rotation, and described counterfeit thermo-optical is by described pin hole output, the implementation space filtering of described pin hole, make described counterfeit thermo-optical have later on identical spatial character by described pin hole, to reduce the impact of space correlation on time correlation.
5. a kind of range measurement system based on counterfeit thermo-optical double velocity correlation according to claim 4, it is characterized in that, the frosted glass of described rotation is by motor driving, regulate the rotational angular velocity that described motor rotary speed can change described frosted glass, thereby accelerate or reduce the linear velocity at hot spot place, frosted glass surface.
6. a kind of range measurement system based on counterfeit thermo-optical double velocity correlation according to claim 1, it is characterized in that, described detecting module also comprises the device that light beam is carried out filtering and coupling, the device of described filtering and coupling has two-way, described counterfeit thermal light source module is sent light beam, described light beam is divided into two-way through described beam splitter, wherein one the tunnel is received by described detector (1) through a road in described filtering and coupling device; Lead up in addition described emitter collimator and extender and shine target object, described target object reflection echo light beam is received by described receiving trap, and is input to described detector (2) through another road in described filtering and coupling device; The output of described detector (1) is as the reference signal, and the output of described detector (2) is as measuring-signal.
7. a kind of range measurement system based on counterfeit thermo-optical double velocity correlation according to claim 6, it is characterized in that, it is 780 ± 2nm that the device of described filtering and coupling has adopted centre wavelength, and bandwidth is 10 ± 2nm, and peak transmittance is minimum is that 50% narrow-band interference filter plate carries out filtering.
8. a kind of range measurement system based on counterfeit thermo-optical double velocity correlation according to claim 1, it is characterized in that, described detecting module also comprises high speed acquisition circuit, and the photoimpact that the output of described detector (1) and (2) is recorded the photoimpact of described reference signal and measuring-signal through described high speed acquisition circuit arrives the time of described range finder module.
9. a kind of range measurement system based on counterfeit thermo-optical double velocity correlation according to claim 2, is characterized in that, described coincidence measurement algorithm is for adding time-delay τ on each label value in measuring-signal time series label
0+ i τ, choose the time tag sequence of reference signal as benchmark, as the mid point of a time interval, and the length of time interval is and meets gate-width with reference to each time tag in the signal time sequence label, and search has time-delay τ in the time interval of each reference signal
0The time tag of the measuring-signal of+i τ, if there is the time tag of measuring-signal to fall in the interval, note meets number and adds one; After having searched for all time tags in signal road, namely obtain the τ that delays time
0Meet several n (τ) under+i τ, and according to equation
Calculate this time-delay τ
0Normalized time second order coherence function g under+i τ
(2)(τ), complete and once meet calculating, namely obtain a sample point, adjust the value of i, calculate all sample points; τ wherein
0For measuring starting point, i is the sample point number.
10. a kind of range measurement system based on counterfeit thermo-optical double velocity correlation according to claim 2, is characterized in that, the described counterfeit thermo-optical field theory formula that described curve fitting algorithm adopts is:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310101179.5A CN103163529B (en) | 2013-03-26 | 2013-03-26 | Distance measuring system based on pseudo thermal light second-order relevance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310101179.5A CN103163529B (en) | 2013-03-26 | 2013-03-26 | Distance measuring system based on pseudo thermal light second-order relevance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103163529A true CN103163529A (en) | 2013-06-19 |
| CN103163529B CN103163529B (en) | 2015-07-15 |
Family
ID=48586771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310101179.5A Expired - Fee Related CN103163529B (en) | 2013-03-26 | 2013-03-26 | Distance measuring system based on pseudo thermal light second-order relevance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103163529B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729458A (en) * | 2015-03-25 | 2015-06-24 | 北京航天控制仪器研究所 | Novel distance measuring instrument based on thermal filed bunching effect |
| CN106323462A (en) * | 2015-07-06 | 2017-01-11 | 上海交通大学 | Novel second-order correlation technology-based weak measurement method |
| CN106325815A (en) * | 2016-10-17 | 2017-01-11 | 清华大学 | Quantum random number generator and quantum random number generation method |
| CN106788399A (en) * | 2016-12-22 | 2017-05-31 | 浙江神州量子网络科技有限公司 | A kind of implementation method of the configurable multichannel coincidence counting device of window time |
| CN108226905A (en) * | 2016-12-21 | 2018-06-29 | 赫克斯冈技术中心 | The laser ranging module of ADC error compensation is carried out by the variation of sampling instant |
| CN109901182A (en) * | 2019-02-18 | 2019-06-18 | 杭州电子科技大学 | A kind of laser ranging system and method based on second order intensity correlation function |
| CN112179507A (en) * | 2020-08-27 | 2021-01-05 | 浙江大学 | Method for measuring optical second-order correlation function based on single-photon detector |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013048A (en) * | 2007-01-30 | 2007-08-08 | 中国科学院上海光学精密机械研究所 | High-brightness pulse type pseudo-thermal light source |
| CN102495467A (en) * | 2011-11-11 | 2012-06-13 | 上海电机学院 | Method utilizing time correlation property of chaotic laser for imaging and device adopting same |
| CN102866405A (en) * | 2012-09-13 | 2013-01-09 | 西北工业大学 | Thermal-optical ranging method based on two-order coherence |
-
2013
- 2013-03-26 CN CN201310101179.5A patent/CN103163529B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013048A (en) * | 2007-01-30 | 2007-08-08 | 中国科学院上海光学精密机械研究所 | High-brightness pulse type pseudo-thermal light source |
| CN102495467A (en) * | 2011-11-11 | 2012-06-13 | 上海电机学院 | Method utilizing time correlation property of chaotic laser for imaging and device adopting same |
| CN102866405A (en) * | 2012-09-13 | 2013-01-09 | 西北工业大学 | Thermal-optical ranging method based on two-order coherence |
Non-Patent Citations (1)
| Title |
|---|
| YUANLU 等: "Experimental Study On Quantum Data Stream Cipher Using Homodyne Detection", 《2012 INTERNATIONAL CONFERENCE ON COMPUTER SCIENCE AND INFORMATION PROCESSING (CSIP)》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729458A (en) * | 2015-03-25 | 2015-06-24 | 北京航天控制仪器研究所 | Novel distance measuring instrument based on thermal filed bunching effect |
| CN106323462A (en) * | 2015-07-06 | 2017-01-11 | 上海交通大学 | Novel second-order correlation technology-based weak measurement method |
| CN106325815A (en) * | 2016-10-17 | 2017-01-11 | 清华大学 | Quantum random number generator and quantum random number generation method |
| CN106325815B (en) * | 2016-10-17 | 2018-12-28 | 清华大学 | A kind of quantum random number generator and quantum random number generation method |
| CN108226905A (en) * | 2016-12-21 | 2018-06-29 | 赫克斯冈技术中心 | The laser ranging module of ADC error compensation is carried out by the variation of sampling instant |
| CN106788399A (en) * | 2016-12-22 | 2017-05-31 | 浙江神州量子网络科技有限公司 | A kind of implementation method of the configurable multichannel coincidence counting device of window time |
| CN106788399B (en) * | 2016-12-22 | 2020-03-03 | 浙江神州量子网络科技有限公司 | Method for realizing window time configurable multi-channel coincidence counter |
| CN109901182A (en) * | 2019-02-18 | 2019-06-18 | 杭州电子科技大学 | A kind of laser ranging system and method based on second order intensity correlation function |
| CN112179507A (en) * | 2020-08-27 | 2021-01-05 | 浙江大学 | Method for measuring optical second-order correlation function based on single-photon detector |
| CN112179507B (en) * | 2020-08-27 | 2022-07-19 | 浙江大学 | Method for measuring optical second-order correlation function based on single-photon detector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103163529B (en) | 2015-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103163529B (en) | Distance measuring system based on pseudo thermal light second-order relevance | |
| CN105629258B (en) | Test the speed range-measurement system and method based on pseudo-random code phases modulation and heterodyne detection | |
| CN101833089B (en) | Doppler anemometry laser radar sensitivity calibrating system and method | |
| CN100478703C (en) | Chaos laser range-measurement method and device based on semiconductor laser | |
| CN106226778A (en) | A kind of coherent lidar system of high resolution measurement remote object | |
| CN206114903U (en) | High resolution measures coherent laser radar system of long -range target | |
| CN110068828A (en) | Device and dispersion compensation method based on the remote ranging of laser frequency-modulation continuous wave | |
| EP3218741B1 (en) | System and method for measuring doppler effect utilizing elastic and inelastic light scattering | |
| CN1844951A (en) | Apparatus and method for distance measurement using chaos laser of optical fiber laser device | |
| CN105676212B (en) | A kind of short range range radar system and the target measuring method based on the system | |
| CN102322997B (en) | Micro-impulse measuring method based on multi-beam laser heterodyne second harmonic method and torsion pendulum method | |
| CN104515475A (en) | Blade tip clearance measuring system based on large-frequency-difference double-frequency laser phase distance measurement | |
| CN104698466B (en) | remote dynamic target distance measuring device and method | |
| CN103076611A (en) | Method and device for measuring speed and distance by coherent detecting laser | |
| JP2017533433A5 (en) | ||
| CN102393247B (en) | Calibration apparatus for laser micro energy | |
| CN112904351B (en) | Single-source positioning method based on quantum entanglement light correlation characteristic | |
| CN102353490B (en) | Micro impulse measuring apparatus using torsion pendulum method of using Doppler vibrating mirror to carry out sine modulation on multiple-beam laser heterodyne and method thereof | |
| CN103954392B (en) | What micro-momentum device was rocked in the measurement of linear frequency modulation multi-beam laser heterodyne rocks micro-impulse measurement method | |
| CN103954390B (en) | Linear frequency modulation double light beam laser process of heterodyning and Inertia Based on Torsion Pendulum Method is adopted to measure the device of micro-momentum and the measuring method of this device | |
| CN102680119A (en) | Method and device for measuring laser frequency stability | |
| CN103994848B (en) | Linear frequency modulation double light beam laser process of heterodyning and Inertia Based on Torsion Pendulum Method is adopted to measure the device of micro-momentum and the measuring method of this device | |
| CN103940354B (en) | Linear frequency modulation multi-beam laser heterodyne measures the device and method of thickness of glass | |
| CN103954391B (en) | The method of micro-momentum is measured based on linear frequency modulation multi-beam laser heterodyne second harmonic method and Inertia Based on Torsion Pendulum Method | |
| Zhu et al. | High anti-interference 3D imaging LIDAR system based on digital chaotic pulse position modulation |
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 | ||
| 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: 20150715 Termination date: 20210326 |