CN108375774A - A kind of single photon image detecting laser radar of no-raster - Google Patents
A kind of single photon image detecting laser radar of no-raster Download PDFInfo
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- CN108375774A CN108375774A CN201810167350.5A CN201810167350A CN108375774A CN 108375774 A CN108375774 A CN 108375774A CN 201810167350 A CN201810167350 A CN 201810167350A CN 108375774 A CN108375774 A CN 108375774A
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
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Abstract
The invention discloses a kind of single photon image detecting laser radars of no-raster, including：Wide range pulse module, wide range pulse module is for exporting wide range pulsed light；Two-dimension chromatic dispersion optical transceiver module, two-dimension chromatic dispersion optical transceiver module is used to wide range pulsed light carrying out two-dimension chromatic dispersion in default light path, it is exported after generating two-dimensional lattice detection light, and receive two-dimensional lattice after being detected to detection target and detect light, and reverses through output feedback detection light after default light path；And signal detection module, after signal detection module is used to carry out dispersion to feedback detection light, carries out single photon counting imaging and analyzing processing obtains the information of detection target.Two-dimension chromatic dispersion is carried out to wide range pulsed light using two-dimension chromatic dispersion optical transceiver module and forms two-dimensional lattice detection light, fully applies wavelength components therein, and avoid scanning situation；And detection target is detected using single photon, and handled using single photon counting imaging, it can realize remote detection.
Description
Technical field
The present invention relates to imaging detection laser radar fields, more specifically, be related to a kind of single photon of no-raster at
As detecting laser radar.
Background technology
Imaging detection laser radar is at scientific research, military affairs, civilian aspect particularly with terrain detection, automatic driving, life
The fields such as object target micro-imaging, high speed processes imaging, national security have major application meaning and development potentiality.
Currently, laser infrared radar imaging Detection Techniques just receive more and more attention, it is increasingly becoming laser radar research heat
Point field.The units such as top colleges and universities of the world and scientific research institution, high-tech enterprise all energetically carry out imaging laser radar system
The research and development of system.The unit that foreign countries are engaged in imaging laser radar includes the projects such as U.S. NASA, U.S. national defense height administration
(Defense Advanced Research Projects Agency, DARPA), the Massachusetts Institute of Technology (MIT), U.S. Kaman
Aviation group (Kaman Aerospace Corporation), Velodyne LiDAR companies of the U.S., U.S. Quanergy are public
Department, Innoviz companies of Israel, Leddar Tech companies of Canada etc..The as above extra large optical precision optical machinery research of domestic aspect
Institute, Harbin Institute of Technology, Xian Electronics Science and Technology University, photoelectric technology research institute of the Chinese Academy of Sciences, Beijing Institute of Technology, national defence
The units such as University of Science and Technology, Zhejiang University, East China Normal University, Chinese Marine University are also in the research for carrying out the relevant technologies.
The field of view of receiver of traditional laser radar is small, in order to carry out high-precision imaging to target, it usually needs is equipped with high
Accurate laser scanning device, this aspect limit image taking speed, on the other hand influence the stability of system.For this purpose, being based on
The three-dimensional imaging of single-photon avalanche diode array camera (single-photon avalanche diode array, SPAD)
Laser radar is suggested.It, will be in laser irradiation to target by light diffuser using laser diode as light source.Single photon
The return photon detection of avalanche photodiode arrays cameras record lower time label, is estimated using the information by series of algorithms
Target reflectivity removes unrelated detection, estimates target depth, and then obtain object construction inversion result.Opposite simple scan formula
For one-dimensional scanning single photon detection scheme, This solution avoids mechanical scannings, improve stiffness of system.Also, it is based on
The imaging technique of SPAD can be imaged using minimal amount of number of photons, be suitable for remote not damaged dim light imaging, but essence
It spends relatively low, only can reach centimetres at present, and algorithm is complicated, object inversion program runtime is long, limits the reality of detection
Shi Xing.
In recent years, the ultrafast imaging technique based on wide spectrum light source achieves larger breakthrough.Wide range pulse is due to arteries and veins
The features such as width is narrow, covering spectral range is wide is rushed, possesses huge advantage in terms of accurate measurement and ultrafast process imaging.At present
It is existing that chemical process, blood flow, high-velocity particles course of injection are imaged using wide range Dispersive.Width most fast at present
The ultrafast imaging technique of light source is composed, using time-stretching technology (Time Stretch Technology), this method takes full advantage of
The wide spectral characteristics of light source, using the orthogonal spatial dispersion device in a pair of of direction by the two-dimensional space information coding of object target in width
Spectrally, signal is unfolded tape pulse in the time domain by dispersion Fourier transformation for the signal returned by target, thus by two
Dimension image sequence turns to one-dimensional time-domain data stream, recycles single pixel photodiode to detect one-dimensional time-domain data stream, uses oscillography
Device is digitized time-domain signal, and one-dimensional vector, which is arranged in two-dimensional matrix, in numeric field carries out image reconstruction.Time-stretching
Technology is mainly used in microprocess imaging at this stage, and imaging precision is high, and speed is fast.For aerial image, the detection of return
Light carries the information of different location and distance, can destroy relationship between frequency and time of the former pulse in dispersive optical fiber, to can not be from obtaining
Time-domain signal differentiate return signal frequency, thus the technology not yet remote macro-goal detect and be imaged on answered
With.
Invention content
In view of this, the present invention provides a kind of single photon image detecting laser radar of no-raster, two-dimension chromatic dispersion is utilized
Optical transceiver module to wide range pulsed light carry out two-dimension chromatic dispersion formed two-dimensional lattice detect light, fully apply wavelength therein at
Point, and avoid scanning situation；And using single photon to detection target detect, and using single photon counting be imaged into
Row processing, can realize remote detection.
To achieve the above object, technical solution provided by the invention is as follows：
A kind of single photon image detecting laser radar of no-raster, including：
Wide range pulse module, the wide range pulse module is for exporting wide range pulsed light；
Two-dimension chromatic dispersion optical transceiver module, the two-dimension chromatic dispersion optical transceiver module are used for the wide range pulsed light in default light
Two-dimension chromatic dispersion is carried out in road, is exported after generating two-dimensional lattice detection light, and receive described two after being detected to detection target
It ties up dot matrix and detects light, and reverses through output feedback detection light after the default light path；
And signal detection module carries out after the signal detection module is used to carry out dispersion to the feedback detection light
Single photon counting is imaged and analyzing processing obtains the information of the detection target.
Optionally, the two-dimension chromatic dispersion optical transceiver module includes：
The input terminal of circulator, the circulator connects the wide range pulse module；
The first port of the first collimating mirror being set in the light path of the first port of the circulator, the circulator is used
In the output wide range pulsed light；
The first cylindrical mirror being set in the light path of first collimating mirror；
The first Dispersive Devices being set in the light path of first cylindrical mirror, first Dispersive Devices are for being connect
The light of receipts carries out dispersion in y-direction；
The second Dispersive Devices being set in the light path of first Dispersive Devices, second Dispersive Devices are used for it
The light of reception carries out dispersion in the x direction and obtains the two-dimensional lattice detection light；
And it is set to the transmitting-receiving telescope in the light path of second Dispersive Devices, the transmitting-receiving telescope is used for will
The two-dimensional lattice detects light output, and receives the two-dimensional lattice after being detected to detection target and detect light, and reversed
Successively after second Dispersive Devices, first Dispersive Devices, first cylindrical mirror and first collimating mirror, by
The second port of the circulator exports the feedback detection light.
Optionally, the signal detection module includes：
The second collimating mirror being set in the light path of the feedback detection light；
It is set to third Dispersive Devices in the light path of second collimating mirror；
The condenser lens being set in the light path of the third Dispersive Devices；
The single photon counting camera being set in the light path of the condenser lens, the single photon counting camera are used for monochromatic light
Sub-count is imaged；
The capture card being connected with the single photon counting camera, the capture card is for acquiring the single photon counting camera
The image data of output；
And the computer being connected with the capture card, the computer according to described image data for being analyzed
Processing obtains the information of the detection target.
Optionally, the signal detection module further includes：
First input port receives the wavelength division multiplexer of the feedback detection light, the second input terminal of the wavelength division multiplexer
Mouth receives pump light；
And the Frequency up-converter being connect with the output port of the wavelength division multiplexer, the second collimating mirror setting
In in the light path of the Frequency up-converter.
Optionally, the signal detection module further includes：
The second cylindrical mirror and the 4th Dispersive Devices being set between second collimating mirror and the third Dispersive Devices,
The light that 4th Dispersive Devices are used to be received carries out dispersion in y-direction, and the third Dispersive Devices are for being connect
The light of receipts carries out dispersion in the x direction；
Wherein, second cylindrical mirror is set in the light path of second collimating mirror, the 4th Dispersive Devices setting
In in the light path of second cylindrical mirror, the third Dispersive Devices are set in the light path of the 4th Dispersive Devices.
Optionally, first Dispersive Devices and four Dispersive Devices are virtual image phased array, echelle grating and battle array
Any one in train wave guide grating；
And second Dispersive Devices and the third Dispersive Devices are diffraction grating.
Optionally, the wide range pulse module includes wide range light-pulse generator；
Wherein, the wide range light-pulse generator is femtosecond laser light source or amplified spontaneous emission source.
Optionally, the wide range pulse module further includes：
The dispersion compensating fiber being connected with the output end of the wide range light-pulse generator；
And the fiber amplifier being connected with the output end of the dispersion compensating fiber.
Optionally, the fiber amplifier is erbium-doped fiber amplifier.
Optionally, the wide range pulse module further includes：
The isolator being connected with the output end of the wide range light-pulse generator.
Compared to the prior art, technical solution provided by the invention has at least the following advantages：
The present invention provides a kind of single photon image detecting laser radars of no-raster, including：Wide range pulse module, it is described
Wide range pulse module is for exporting wide range pulsed light；Two-dimension chromatic dispersion optical transceiver module, the two-dimension chromatic dispersion optical transceiver module are used for
The wide range pulsed light is subjected to two-dimension chromatic dispersion in default light path, is exported after generating two-dimensional lattice detection light, and to detection
Target receives the two-dimensional lattice detection light after being detected, and reverses through output feedback detection light after the default light path；
And signal detection module carries out single photon meter after the signal detection module is used to carry out dispersion to the feedback detection light
Number imaging and analyzing processing obtain the information of the detection target.As shown in the above, technical solution provided by the invention, profit
Two-dimension chromatic dispersion is carried out to wide range pulsed light with two-dimension chromatic dispersion optical transceiver module and forms two-dimensional lattice detection light, is fully applied wherein
Wavelength components, and avoid scanning situation；And detection target is detected using single photon, and use single photon meter
Number imaging is handled, and can realize remote detection.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural representation of the single photon image detecting laser radar of no-raster provided by the embodiments of the present application
Figure；
Fig. 2 is the structural representation of the single photon image detecting laser radar of another no-raster provided by the embodiments of the present application
Figure；
Fig. 3 is the structural representation of the single photon image detecting laser radar of another no-raster provided by the embodiments of the present application
Figure；
Fig. 4 is the structural representation of the single photon image detecting laser radar of another no-raster provided by the embodiments of the present application
Figure；
Fig. 5 is the structural representation of the single photon image detecting laser radar of another no-raster provided by the embodiments of the present application
Figure；
Fig. 6 is the schematic diagram that two-dimensional lattice provided by the embodiments of the present application detects light；
Fig. 7 is that two-dimensional lattice provided by the embodiments of the present application detects light and detects the schematic diagram of target.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As described in background, in recent years, the ultrafast imaging technique based on wide spectrum light source achieves larger breakthrough.It is wide
Spectrum pulse is due to having the characteristics that pulse width is narrow, covering spectral range is wide, in terms of accurate measurement and ultrafast process imaging
Possess huge advantage.It is existing at present that chemical process, blood flow, high-velocity particles course of injection are carried out using wide range Dispersive
Imaging.The ultrafast imaging technique of wide spectrum light source most fast at present, using time-stretching technology (Time Stretch
Technology), this method takes full advantage of the wide spectral characteristics of light source, using the orthogonal spatial dispersion device in a pair of of direction by object
The two-dimensional space information coding of body target wideband pulse spectrally, by target return signal become by dispersion Fourier
It changes, signal is unfolded in the time domain, to which two-dimensional image sequence is turned to one-dimensional time-domain data stream, recycle single pixel photoelectricity two
Pole pipe detects one-dimensional time-domain data stream, is digitized to time-domain signal with oscillograph, is arranged in one-dimensional vector in numeric field
Two-dimensional matrix carries out image reconstruction.Time-stretching technology is mainly used in microprocess imaging at this stage, and imaging precision is high, speed
Degree is fast, and time-stretching technology is mainly used in microprocess imaging at this stage, and imaging precision is high, and speed is fast.For space at
Picture, the detection light of return carry the information of different location and distance, can destroy relationship between frequency and time of the former pulse in dispersive optical fiber, from
And the frequency of return signal can not be differentiated from obtained time-domain signal, thus the technology not yet in the detection of remote macro-goal and
It is applied in imaging.
Based on this, the embodiment of the present application provides a kind of single photon image detecting laser radar of no-raster, utilizes two dimension
Dispersion optical transceiver module carries out two-dimension chromatic dispersion to wide range pulsed light and forms two-dimensional lattice detection light, fully applies wavelength therein
Ingredient, and avoid scanning situation；And detection target is detected using single photon, and be imaged using single photon counting
It is handled, can realize remote detection.To achieve the above object, technical solution provided by the embodiments of the present application is as follows,
Specifically technical solution provided by the embodiments of the present application is described in detail in conjunction with Fig. 1 to Fig. 7.
Refering to what is shown in Fig. 1, being a kind of single photon image detecting laser radar of no-raster provided by the embodiments of the present application
Structural schematic diagram, wherein imaging detection laser radar includes：
Wide range pulse module 100, the wide range pulse module 100 is for exporting wide range pulsed light；
Two-dimension chromatic dispersion optical transceiver module 200, the two-dimension chromatic dispersion optical transceiver module 200 is for existing the wide range pulsed light
Two-dimension chromatic dispersion is carried out in default light path, is exported after generating two-dimensional lattice detection light, and received after being detected to detection target
The two-dimensional lattice detects light, and reverses through output feedback detection light after the default light path；
And signal detection module 300, the signal detection module 300 are used to carry out dispersion to the feedback detection light
Afterwards, it carries out single photon counting imaging and analyzing processing obtains the information of the detection target.
As shown in the above, technical solution provided by the embodiments of the present application, using two-dimension chromatic dispersion optical transceiver module to width
It composes pulsed light and carries out two-dimension chromatic dispersion formation two-dimensional lattice detection light, fully apply wavelength components therein, and avoid and sweep
Retouch situation；And detection target is detected using single photon, and handled using single photon counting imaging, it can realize
Detection at a distance.
The structure of several specific imaging detection laser radars provided by the embodiments of the present application is said below in conjunction with the accompanying drawings
It is bright.
Refering to what is shown in Fig. 2, for the single photon image detecting laser radar of another no-raster provided by the embodiments of the present application
Structural schematic diagram, wherein the wide range pulse module 100 provided by the embodiments of the present application include wide range light-pulse generator 110；
Wherein, the wide range light-pulse generator 110 can be femtosecond laser light source or amplified spontaneous emission source.The application is real
The wide range light-pulse generator for applying example offer, which is the light of output, has larger spectrum width, generally tens to hundreds of nanometer typical
Wide range light-pulse generator have femtosecond laser light source and amplified spontaneous emission source of visible light wave range and infrared band etc., wherein
The emergent light sheet of femtosecond laser light source is as pulsed light, and amplified spontaneous emission source emergent light needs to combine light for continuous light
Electric modulator is modulated to pulsed light.It, can be to detection since femtosecond laser repetition rate is high when using femtosecond laser light source
Mobile target in range carries out implementing tracking detection, by appropriately designed, can generate intensive two-dimensional lattice and detect light to close
It is imaged apart from static macro-goal.
In one embodiment of the application, refering to what is shown in Fig. 2, the wide range pulse module 100 provided by the present application further includes：
The dispersion compensating fiber 130 being connected with the output end of the wide range light-pulse generator 110；
And the fiber amplifier 140 being connected with the output end of the dispersion compensating fiber 130, wherein different frequency
Light has the speed of different transmission, thus in the time domain can separate the light of these different frequencies, due to femtosecond laser or narrow
The luminous power of pulse is integrally larger, and the light of different frequency is separated to be amplified to place again in the time domain and burns optical fiber, is put
Big parameter, which needs to be integrated according to light source, the loss of each device and detection range, to be determined.Optionally, institute provided by the embodiments of the present application
It can be erbium-doped fiber amplifier to state fiber amplifier, wherein the operation wave band of wide range light-pulse generator is infrared band.
Further, refering to what is shown in Fig. 2, the wide range pulse module 100 provided by the embodiments of the present application further includes：
The isolator 120 being connected with the output end of the wide range light-pulse generator 110.Wherein, include in wide range pulse module
When having dispersion compensating fiber and fiber amplifier, dispersion compensating fiber is connected to the output end of isolator.Wherein, isolator is set
Setting can prevent from entering laser device by the light being reflected back in subsequent optical path and damage laser device structure.
Refering to what is shown in Fig. 2, the two-dimension chromatic dispersion optical transceiver module 200 provided by the embodiments of the present application includes：
The input terminal of circulator 210, the circulator 210 connects the wide range pulse module 100；
The first collimating mirror 220 being set in the light path of the first port of the circulator 210, the circulator 210
First port is for exporting the wide range pulsed light；
The first cylindrical mirror 230 being set in the light path of first collimating mirror 220；
The first Dispersive Devices 240 being set in the light path of first cylindrical mirror 230, first Dispersive Devices 240
Light for being received carries out dispersion in y-direction；
The second Dispersive Devices 250 being set in the light path of first Dispersive Devices 240, second Dispersive Devices
250 light for being received carries out dispersion in the x direction and obtains the two-dimensional lattice detection light；
And it is set to the transmitting-receiving telescope 260 in the light path of second Dispersive Devices 250, the transmitting-receiving telescope
260 by the two-dimensional lattice for detecting light output, and receives the two-dimensional lattice after being detected to detection target and detect
Light, and it is reversed successively by second Dispersive Devices 250, first Dispersive Devices 240,230 and of the first cylindrical mirror
After first collimating mirror 220, the feedback detection light is exported by the second port of the circulator 210.
Refering to what is shown in Fig. 2, the signal detection module 300 provided by the embodiments of the present application includes：
The second collimating mirror 310 being set in the light path of the feedback detection light；
It is set to third Dispersive Devices 320 in the light path of second collimating mirror 310；
The condenser lens 330 being set in the light path of the third Dispersive Devices 320；
The single photon counting camera 340 being set in the light path of the condenser lens 330, the single photon counting camera
340 are imaged for single photon counting；
The capture card 350 being connected with the single photon counting camera 340, the capture card 350 is for acquiring the monochromatic light
The image data that sub-count camera 340 exports；
And the computer 360 being connected with the capture card 350, the computer 360 are used for according to described image data
It carries out analyzing processing and obtains the information of the detection target.
The operation wave band of the imaging detection laser radar in conjunction with shown in Fig. 2, wide range light-pulse generator and single photon counting camera
It is identical, it is visible light wave range or infrared band.Wherein, single photon counting camera is single photon counting alignment camera.The application
Embodiment realizes the distant object of no-raster using two-dimension chromatic dispersion optical transceiver module and one-dimensional single photon counting alignment camera
The detection of large scale and high accuracy real-time target and tracking may be implemented using more set system group networks in detection.And the embodiment of the present application
The wide range light-pulse generator of use is identical with single photon counting alignment camera operation wave band, can be adapted for all wave bands；In addition, letter
Number detecting module using one-dimensional dispersion (i.e. only including a third Dispersive Devices, which can be diffraction grating),
Structure is simpler compact.
Wide range pulsed light can be converted to two-dimensional lattice detection light (reference by two-dimension chromatic dispersion transceiver module provided by the present application
The schematic diagram of the detection light of two-dimensional lattice provided by the embodiments of the present application shown in Fig. 6), include mainly that two spaces dispersion is mutual
Vertical Dispersive Devices, the first Dispersive Devices have the diffraction light of high level and each diffraction time has overlapping, the second dispersor
Part is unfolded by the diffraction time of overlapping in another dimension, ultimately forms two-dimensional emergent light.Provided by the embodiments of the present application first
Dispersive Devices can be echelle grating, virtual image phased array or array waveguide grating.
Wherein, the device, which can be regarded as into, which to be changed, is further illustrated to image-forming principle by taking virtual image phased array (VIPA) as an example
Into Fabry-Perot etalon, typical structure include two panels glass plate, output plate face plate part reflectance coating, tablet
Face rest part in addition to input window plates reflectance coating.Input window is penetrated by a branch of collimation laser is by cylindrical mirror, is focused on
The output plate face of virtual image phased array, light beam are emitted after its intracavitary roundtrip by output plate face, and light beam is in intracavity reflecting phase
When in forming multiple virtual image arrays perpendicular to the direction of glass plate in focal length point.
According to multiple-beam interference theory, when a certain wavelength X meets constructive interference condition, i.e., adjacent emergent light phase difference meets
The integral multiple of 2 π, in shooting angle θoutputForm intensity maxima.Constructive interference condition is：
In formula 1, k=2 π/λ, t are the spacing of two glass plates of virtual image phased array, n0For ambient refractive index, nrFor
Refractive Index of Material between the glass plate of virtual image phased array,For the angle of virtual image phased array and incident light, whereinθ is shooting angle, and m is integer.
Freely composing spacing (FSR) is：
Formula 2 shows that same shooting angle includes the outgoing light frequency that frequency interval is FSR, and wherein FSR should be less than detecting
The total bandwidth of wave band.
The diffraction time light of overlapping can be separated using diffraction grating, to form two-dimensional lattice, wherein longitudinal color
It dissipates and is generated by virtual image phased array, lateral dispersion is generated by diffraction grating (i.e. the second Dispersive Devices).As in Fig. 6 in the direction of arrows
(N1, N2 ... Nn) is numbered to each point, corresponding point is each numbered and represents a direction (θx,θy) and a wavelength XN,
Middle θxFor the dispersion angle that diffraction grating generates, θyThe dispersion angle generated for virtual image phased array.
If Fig. 7 is that two-dimensional lattice provided by the embodiments of the present application detects light and detects the structural schematic diagram of target, when there is shifting
When moving-target (detects target, that is, detect aircraft in Fig. 7) passing point face coverage area, the direction blocked is (θxi,θyi)
Wavelength XNiBe reflected back two-dimension chromatic dispersion optical transceiver module, and after after signal detection module carries out dispersion process by single photon counting at
The pixel of picture, the image being then imaged to single photon counting carries out number corresponding with eye point face, obtains detection mesh
Target directional information, using the time-of-flight method of detection target, it is S=τ c/2 to obtain target range information, and wherein τ is λNiFly
Row time, c are the light velocity, and distance resolution is determined by pulse width, finally obtain the information of detection target.
Refering to what is shown in Fig. 3, for the single photon image detecting laser radar of another no-raster provided by the embodiments of the present application
Structural schematic diagram, compared to the imaging detection laser radar that Fig. 2 is provided, imaging detection laser radar shown in Fig. 3 it is described
Signal detection module 300 further includes：
First input port receives the wavelength division multiplexer 370 of the feedback detection light, and the second of the wavelength division multiplexer 370
Input port receives pump light；
And the Frequency up-converter 380 being connect with the output port of the wavelength division multiplexer 370, second collimation
Mirror 310 is set in the light path of the Frequency up-converter 380.
The operation wave band of the imaging detection laser radar in conjunction with shown in Fig. 3, wide range light-pulse generator is infrared band, in two dimension
After dot matrix detection light detects detection target, the feedback detection light of return is closed by wavelength division multiplexer and pump light
The feedback detection light of infrared band is then converted to visible light wave range by beam by frequency upooaversion device, then again from
(single photon counting camera provided by the embodiments of the present application is single photon counting alignment (such as Si- to the single photon counting camera of optical band
APD alignments) camera) it is detected, improve the signal-to-noise ratio of detection efficient and detection.The embodiment of the present application is received using two-dimension chromatic dispersion light
It sends out module and one-dimensional single photon counting alignment camera realizes the long-range target acquisition of no-raster, it can using more set system group networks
To realize the detection of large scale and high accuracy real-time target and tracking.It is red in feedback detection light and using frequency upooaversion technology
When wave section, feedback detection light become after conversion the light of visible light wave range, utilizes the single photon counting of visible light wave range
Alignment camera is detected, and compared to relatively directly using the single photon counting alignment camera of infrared band to detect, improves detection efficient
And signal-to-noise ratio；And signal detection module uses one-dimensional dispersion, it is simple and compact for structure.
Refering to what is shown in Fig. 4, for the single photon image detecting laser radar of another no-raster provided by the embodiments of the present application
Structural schematic diagram, compared to the imaging detection laser radar that Fig. 2 is provided, imaging detection laser radar shown in Fig. 4 it is described
Signal detection module 300 further includes：
The second cylindrical mirror 391 and the 4th being set between second collimating mirror 310 and the third Dispersive Devices 320
Dispersive Devices 392, the light that the 4th Dispersive Devices 392 are used to be received carry out dispersion, the third dispersion in y-direction
The light that device 320 is used to be received carries out dispersion in the x direction；
Wherein, second cylindrical mirror 391 is set in the light path of second collimating mirror 310, the 4th dispersor
Part 392 is set in the light path of second cylindrical mirror 391, and the third Dispersive Devices 330 are set to the 4th dispersor
In the light path of part 392.
The imaging detection laser radar in conjunction with shown in Fig. 4, single photon counting camera provided by the embodiments of the present application are single photon
Count area array cameras, wherein wide range light-pulse generator is identical with the operation wave band of single photon counting area array cameras, all can be visible
Optical band or infrared band.The embodiment of the present application uses two-dimension chromatic dispersion optical transceiver module and one-dimensional single photon counting alignment camera
The long-range target acquisition for realizing no-raster, using more set system group networks may be implemented the detection of large scale and high accuracy real-time target and
Tracking.And the embodiment of the present application uses wide range light-pulse generator identical with single photon counting alignment camera operation wave band, Ke Yishi
For all wave bands, and it is simple and compact for structure.
Refering to what is shown in Fig. 5, for the single photon image detecting laser radar of another no-raster provided by the embodiments of the present application
Structural schematic diagram, compared to the imaging detection laser radar that Fig. 3 is provided, imaging detection laser radar shown in Fig. 5 it is described
Signal detection module 300 further includes：
The second cylindrical mirror 391 and the 4th being set between second collimating mirror 310 and the third Dispersive Devices 320
Dispersive Devices 392, the light that the 4th Dispersive Devices 392 are used to be received carry out dispersion, the third dispersion in y-direction
The light that device 320 is used to be received carries out dispersion in the x direction；
Wherein, second cylindrical mirror 391 is set in the light path of second collimating mirror 310, the 4th dispersor
Part 392 is set in the light path of second cylindrical mirror 391, and the third Dispersive Devices 330 are set to the 4th dispersor
In the light path of part 392.
The operation wave band of the imaging detection laser radar in conjunction with shown in Fig. 5, wide range light-pulse generator is infrared band, in two dimension
After dot matrix detection light detects detection target, the feedback detection light of return is closed by wavelength division multiplexer and pump light
The feedback detection light of infrared band is then converted to visible light wave range by beam by frequency upooaversion device, then again from
(single photon counting camera provided by the embodiments of the present application is single photon counting face battle array (such as Si- to the single photon counting camera of optical band
The faces APD battle array) camera) it is detected, improve the signal-to-noise ratio of detection efficient and detection.The embodiment of the present application is received using two-dimension chromatic dispersion light
It sends out module and one-dimensional single photon counting alignment camera realizes the long-range target acquisition of no-raster, it can using more set system group networks
To realize the detection of large scale and high accuracy real-time target and tracking.It is red in feedback detection light and using frequency upooaversion technology
When wave section, feedback detection light become after conversion the light of visible light wave range, utilizes the single photon counting of visible light wave range
Alignment camera is detected, and compared to relatively directly using the single photon counting alignment camera of infrared band to detect, improves detection efficient
And signal-to-noise ratio.
In the above-mentioned any one embodiment of the application, first Dispersive Devices provided by the present application and four dispersor
Part is any one in virtual image phased array, echelle grating and array waveguide grating；
And second Dispersive Devices and the third Dispersive Devices are diffraction grating.
In addition, in the above-mentioned any one embodiment of the application, diffraction grating provided by the present application can be reflective diffraction
Grating, transmissive diffraction grating or holographic grating.
The embodiment of the present application provides a kind of single photon image detecting laser radar of no-raster, including：Wide range pulse mode
Block, the wide range pulse module is for exporting wide range pulsed light；Two-dimension chromatic dispersion optical transceiver module, the two-dimension chromatic dispersion light receive and dispatch mould
Block is used to the wide range pulsed light carrying out two-dimension chromatic dispersion in default light path, is exported after generating two-dimensional lattice detection light, and
The two-dimensional lattice is received after being detected to detection target and detects light, and is visited reverses through output feedback after the default light path
Survey light；And signal detection module, after the signal detection module is used to carry out dispersion to the feedback detection light, carry out single
Photon counting imaging and analyzing processing obtain the information of the detection target.As shown in the above, the embodiment of the present application provides
Technical solution, using two-dimension chromatic dispersion optical transceiver module to wide range pulsed light carry out two-dimension chromatic dispersion formed two-dimensional lattice detect light,
Wavelength components therein are fully applied, and avoid scanning situation；And detection target is detected using single photon,
And handled using single photon counting imaging, it can realize remote detection.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (10)
1. a kind of single photon image detecting laser radar of no-raster, which is characterized in that including：
Wide range pulse module, the wide range pulse module is for exporting wide range pulsed light；
Two-dimension chromatic dispersion optical transceiver module, the two-dimension chromatic dispersion optical transceiver module are used for the wide range pulsed light in default light path
Two-dimension chromatic dispersion is carried out, is exported after generating two-dimensional lattice detection light, and the two-dimensional points are received after being detected to detection target
Battle array detection light, and reverses through output feedback detection light after the default light path；
And signal detection module carries out monochromatic light after the signal detection module is used to carry out dispersion to the feedback detection light
Sub-count is imaged and analyzing processing obtains the information of the detection target.
2. the single photon image detecting laser radar of no-raster according to claim 1, which is characterized in that the two dimension color
Astigmatism transceiver module includes：
The input terminal of circulator, the circulator connects the wide range pulse module；
The first collimating mirror being set in the light path of the first port of the circulator, the first port of the circulator is for defeated
Go out the wide range pulsed light；
The first cylindrical mirror being set in the light path of first collimating mirror；
The first Dispersive Devices being set in the light path of first cylindrical mirror, what first Dispersive Devices were used to be received
Light carries out dispersion in y-direction；
The second Dispersive Devices being set in the light path of first Dispersive Devices, second Dispersive Devices are for being received
Light carry out dispersion in the x direction and obtain two-dimensional lattice detection light；
And it is set to the transmitting-receiving telescope in the light path of second Dispersive Devices, the transmitting-receiving telescope is used for will be described
Two-dimensional lattice detects light output, and receives the two-dimensional lattice after being detected to detection target and detect light, and reversely successively
After second Dispersive Devices, first Dispersive Devices, first cylindrical mirror and first collimating mirror, by described
The second port of circulator exports the feedback detection light.
3. the single photon image detecting laser radar of no-raster according to claim 2, which is characterized in that the signal is visited
Surveying module includes：
The second collimating mirror being set in the light path of the feedback detection light；
It is set to third Dispersive Devices in the light path of second collimating mirror；
The condenser lens being set in the light path of the third Dispersive Devices；
The single photon counting camera being set in the light path of the condenser lens, the single photon counting camera is based on single photon
Number imaging；
The capture card being connected with the single photon counting camera, the capture card is for acquiring the single photon counting camera output
Image data；
And the computer being connected with the capture card, the computer are used to carry out analyzing processing according to described image data
Obtain the information of the detection target.
4. the single photon image detecting laser radar of no-raster according to claim 3, which is characterized in that the signal is visited
Surveying module further includes：
First input port receives the wavelength division multiplexer of the feedback detection light, and the second input port of the wavelength division multiplexer connects
Receive pump light；
And the Frequency up-converter being connect with the output port of the wavelength division multiplexer, second collimating mirror are set to institute
It states in the light path of Frequency up-converter.
5. the single photon image detecting laser radar of no-raster according to claim 3 or 4, which is characterized in that the letter
Number detecting module further includes：
The second cylindrical mirror and the 4th Dispersive Devices being set between second collimating mirror and the third Dispersive Devices, it is described
The light that 4th Dispersive Devices are used to be received carries out dispersion in y-direction, what the third Dispersive Devices were used to be received
Light carries out dispersion in the x direction；
Wherein, second cylindrical mirror is set in the light path of second collimating mirror, and the 4th Dispersive Devices are set to institute
In the light path for stating the second cylindrical mirror, the third Dispersive Devices are set in the light path of the 4th Dispersive Devices.
6. the single photon image detecting laser radar of no-raster according to claim 5, which is characterized in that first color
It is any one in virtual image phased array, echelle grating and array waveguide grating to dissipate device and four Dispersive Devices；
And second Dispersive Devices and the third Dispersive Devices are diffraction grating.
7. the single photon image detecting laser radar of no-raster according to claim 1, which is characterized in that the wide range arteries and veins
Die block includes wide range light-pulse generator；
Wherein, the wide range light-pulse generator is femtosecond laser light source or amplified spontaneous emission source.
8. the single photon image detecting laser radar of no-raster according to claim 7, which is characterized in that the wide range arteries and veins
Die block further includes：
The dispersion compensating fiber being connected with the output end of the wide range light-pulse generator；
And the fiber amplifier being connected with the output end of the dispersion compensating fiber.
9. the single photon image detecting laser radar of no-raster according to claim 8, which is characterized in that the optical fiber is put
Big device is erbium-doped fiber amplifier.
10. the single photon image detecting laser radar of the no-raster according to claim 7~9 any one, feature exist
In the wide range pulse module further includes：
The isolator being connected with the output end of the wide range light-pulse generator.
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