CN112558039A - Multi-beam transmitting-receiving optical system - Google Patents
Multi-beam transmitting-receiving optical system Download PDFInfo
- Publication number
- CN112558039A CN112558039A CN202011267239.7A CN202011267239A CN112558039A CN 112558039 A CN112558039 A CN 112558039A CN 202011267239 A CN202011267239 A CN 202011267239A CN 112558039 A CN112558039 A CN 112558039A
- Authority
- CN
- China
- Prior art keywords
- laser
- optical system
- module
- echo signal
- optical fiber
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4818—Constructional features, e.g. arrangements of optical elements using optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4817—Constructional features, e.g. arrangements of optical elements relating to scanning
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention provides a multi-beam receiving and transmitting different-position optical system which comprises a laser beam splitting and transmitting module, an echo signal transmission module and an echo signal receiving module, wherein after a laser of the laser beam splitting and transmitting module emits light, a laser beam expanding lens expands the laser, a diffraction beam splitting module DOE divides 64 laser lattices into the laser lattices to be transmitted, the emitted laser is received and coupled into a corresponding optical fiber array by a telescope of the echo signal transmission module after being reflected by a target, and echo signals are transmitted to a photosensitive surface corresponding to an array detector through the optical fiber array, an optical filter of the echo signal receiving module and a double telecentric optical system. The invention provides a diffraction light splitting and receiving and sending out different optical fiber matching technology, which solves the beam splitting requirement of high-efficiency 64 beams of laser through the design of a diffraction optical device DOE; by the arrangement design of the optical fiber area array and the design of a telecentric optical system, the strict matching technology of the transmitting field and the receiving field can be realized, and the large-field and high-density laser three-dimensional detection can be completed.
Description
Technical Field
The invention relates to the technical field, in particular to a multi-beam transmitting-receiving different-position optical system.
Background
The laser radar has wide application, relates to a plurality of subject fields, and has wide application prospect in military affairs and civil use. In the military aspect: the laser radar can be used for guidance and navigation of cruise missiles, a distance measuring system, low-flying target tracking measurement, measurement of target flight attitude, detection of chemical and biological warfare agents, underwater positioning, communication and the like. In the civil aspect: the laser radar can be used in the fields of atmospheric remote sensing and atmospheric measurement, atmospheric ozone measurement, dangerous case prediction, mapping and geodetic measurement in industrial production, vehicle collision prevention, robot vision, nondestructive testing, medical diagnosis and the like. Lidar technology has achieved significant research and application efforts.
The multi-beam laser radar is an active sensor, which uses an existing unmanned aerial vehicle as a working platform, irradiates a target by emitting laser with different wavelengths, and receives echo signals to obtain active multispectral data and three-dimensional space data. The method has wide application in high-point density topographic mapping, seamless water and land integrated detection, environment modeling, fine urban drawing and vegetation classification.
However, the existing laser radar cannot meet the requirements of large-field and high-density three-dimensional mapping.
Disclosure of Invention
The invention aims to solve the problem of difficult three-dimensional mapping with large visual field and high density, provides a diffraction light splitting and receiving-transmitting different-position optical fiber matching technology, solves the beam splitting requirement of 64 laser beams with high efficiency through the design of a diffraction optical device DOE, realizes the high-precision matching of a multi-beam laser transmitting visual field and a receiving visual field, performs multi-beam high-resolution laser three-dimensional detection, and acquires high-precision accurate information; by the arrangement design of the optical fiber area array and the design of the telecentric optical system, the strict matching technology of the transmitting field and the receiving field can be realized, the large field and the high sampling density are considered, the power consumption and the weight of the system are reduced, and the complexity of the system is reduced.
The invention provides a multi-beam receiving and transmitting different-position optical system which comprises a laser beam splitting and transmitting module, an echo signal transmission module and an echo signal receiving module, wherein the echo signal transmission module is arranged on one side of the laser beam splitting and transmitting module;
the laser beam splitting and transmitting module is used for transmitting laser and performing beam expanding, compressing and beam splitting to obtain multi-beam laser output, the echo signal transmitting module is used for receiving echo signals generated by reflection of the multi-beam laser by a target and coupling the echo signals to the optical fiber end faces corresponding to the optical fiber array to output multi-beam echo signals, the echo signals correspond to the multi-beam laser one by one, and the echo signal receiving module is used for receiving the multi-beam echo signals output by the echo signal transmitting module, respectively performing collimation and convergence and coupling the multi-beam echo signals to pixels corresponding to the detector.
The invention relates to a multi-beam transmitting-receiving optical system which is characterized in that as an optimal mode, a laser beam splitting and transmitting module comprises a laser, a laser beam expander and a diffraction beam splitting module (DOE) which are sequentially arranged, the laser is used for transmitting laser to the laser beam expander, the laser beam expander is used for receiving the laser transmitted by the laser, expanding the laser, compressing divergence angle and then transmitting the laser to the diffraction beam splitting module, and the beam splitting module is used for receiving the laser expanded by the laser beam expander and splitting the laser into multi-beam laser to be output.
In the multi-beam transmitting-receiving different-position optical system, as a preferable mode, the multi-beam laser is 64 lasers with equal interval angles and the same single-beam divergence angle.
The invention discloses a multi-beam receiving and transmitting different-position optical system, which is preferably characterized in that the interval angle is 333uRad, and the single-beam divergence angle is 50 uRad.
According to the multi-beam receiving and transmitting different-position optical system, as a preferred mode, the output mode of a laser is optical fiber output, the diameter of an optical fiber core is 25 micrometers, and NA is 0.08;
the aperture of the laser beam expander is 80mm, and the effective focal length is 500 mm.
The invention relates to a multi-beam transceiving different-position optical system, which is a preferred mode, wherein an echo signal transmission module comprises an image space telecentric optical system and an area array optical fiber array which are sequentially connected, the image space telecentric optical system is used for receiving echo signals generated by multi-beam laser reflected by a target and coupling the echo signals to the corresponding optical fiber end surface of the area array optical fiber array, and the area array optical fiber array is used for outputting the echo signals coupled by the image space telecentric optical system to an echo signal receiving module.
As a preferred mode, the image space telecentric optical system is a telescope with an effective aperture of 100mm, a total field of view of 0.4 degrees and an emergent ray parallel to an optical axis, and the single-beam receiving field angle of the telescope is 144 urad.
As a preferred mode, one end of an area array optical fiber array is arranged into a 16 multiplied by 4 array, the arrangement mode of the area array optical fiber array is consistent with the arrangement mode of laser transmitting foot points of a laser beam splitting and transmitting module, and the end of the area array optical fiber array is arranged at a focal plane of a telescope and used for receiving echo signals; the other end of the area array optical fiber array is arranged into 4 multiplied by 4 area arrays which correspond to the echo signal receiving module.
The invention relates to a multi-beam transceiving different-position optical system, which is used as a preferred mode, wherein an echo signal receiving module comprises a double telecentric optical system, a single-photon detector group and an optical filter arranged on one side of the double telecentric optical system which are sequentially arranged, and the double telecentric optical system is electrically connected with an echo signal transmission module;
the double telecentric optical system is used for receiving a plurality of echo signals output by the echo signal transmission module, respectively collimating, converging and coupling the echo signals to pixels corresponding to the single photon detector group, and the optical filter is used for filtering stray light.
As a preferred mode, the single-photon detector group comprises 4 multiplied by 4 single-photon detectors.
The multi-beam transceiving different-position optical system consists of a laser beam splitting and transmitting module, an echo signal transmission module and an echo signal receiving module; the laser beam splitting and transmitting module consists of a laser beam expanding lens and a diffraction beam splitting module DOE, the divergence angle of laser emitted by the laser is large, the laser beam expanding lens expands the beam and compresses the divergence angle, and the DOE splits the beam of the laser after the beam expansion, so that 64 beams of laser with equal interval angles and the same single beam divergence angle are transmitted; the echo signal transmission module consists of an image space telecentric optical system and an area array optical fiber array; the image space telecentric optical system receives the echo signal and couples the echo signal to the optical fiber end face corresponding to the optical fiber array; one end of the area array optical fiber array is arranged at the image surface of the telescope, the arrangement mode of the end is consistent with the arrangement mode of laser foot points after the DOE beam splitting, and the image space telecentric optical system is ensured to be in one-to-one correspondence between received signals and emitted light beams. The echo signal is transmitted by the optical fiber array and then output, and is received and detected by an echo signal receiving module, and the echo signal receiving module consists of a double telecentric optical system, an optical filter and a 4 multiplied by 4 array single photon detector; because the light output by the optical fiber has a larger divergence angle, and the pixel size and the pixel interval of the area array detector are smaller (less than 100 mu m), a double telecentric optical system is adopted to collimate and converge the laser output by the area array optical fiber and couple the laser to the pixel corresponding to the detector, and the optical filter is arranged between the photosensitive surface of the detector and the double telecentric optical system and is used for shielding parasitic light.
The technical solution of the invention is as follows:
(1) the method can design the divergence angle of a single laser beam, the interval angle of the beams, the distribution of laser foot points and the quantity of the laser beams according to requirements, replace the traditional scanning mode and meet the requirements of three-dimensional mapping with large field of view and high density;
(2) the receiving detection of the multi-channel parallel echo signals is realized by using a telecentric optical system, array optical fibers and an area array single photon detector.
The invention adopts optical means such as DOE, optical fiber array and the like to realize high-precision matching of the multi-beam laser emission view field and the receiving view field, and performs multi-beam high-resolution laser three-dimensional detection to obtain high-precision accurate information. According to the technology, the DOE beam splitting push-broom mode replaces the traditional mechanical scanning mode, the large field of view and the high sampling density are both considered, the power consumption and the weight of the system are reduced, and the complexity of the system is reduced.
The invention has the following advantages:
(1) the invention uses a multi-channel detection mode combining DOE and an optical fiber array, can realize three-dimensional measurement with large visual field and high density, and has greater advantages in the aspects of system complexity, power consumption, weight, detection effect and the like compared with the traditional scanning detection mode;
(2) the DOE is used for laser beam splitting, the DOE is high in beam splitting efficiency, uniform in beam splitting and small in single beam divergence angle, and beam arrangement can be flexibly designed according to needs;
(3) in the invention, the optical fiber array is used for replacing a driving motor of a scanning galvanometer, so that large-field multi-channel three-dimensional detection can be realized;
(4) the invention uses the telecentric optical system to carry out multi-channel optical fiber coupling, realizes the receiving of echo signals, and respectively couples the multi-channel echo signals to the pixels of the array detector, the single-channel coupling efficiency is high, and the signals between the channels have no crosstalk.
Drawings
Fig. 1 is a schematic diagram of an optical system of an embodiment 1 of a multi-beam transceiving different-location optical system;
FIG. 2 is a schematic diagram of an optical system of embodiments 2-3 of a multi-beam transmit-receive diversity optical system;
FIG. 3 is a schematic diagram of a laser beam splitting and emitting module of a multi-beam transmitting-receiving different-position optical system;
FIG. 4 is a diagram of a distribution of laser foot points after a multi-beam transmit-receive differential optical system diffracts and splits light;
FIG. 5 is a layout diagram of a telescope with a multi-beam transmit-receive optical system;
FIG. 6 is a layout diagram of an optical fiber array of a multi-beam transmit-receive optical system;
fig. 7 is a diagram of a double telecentric optical system of a multi-beam transceiving heterotopic optical system.
Reference numerals:
1. a laser beam splitting and emitting module; 11. a laser; 12. a laser beam expander; 13. a diffraction beam splitting module; 2. an echo signal transmission module; 21. an image-side telecentric optical system; 22. an area array optical fiber array; 3. an echo signal receiving module; 31. a double telecentric optical system; 32. a single photon detector group; 33. and (3) a filter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
As shown in fig. 1, a multi-beam transceiving optical system comprises a laser beam splitting and transmitting module 1, an echo signal transmission module 2 disposed at one side of the laser beam splitting and transmitting module 1, and an echo signal receiving module 3 electrically connected to the echo signal transmission module 2;
the laser beam splitting and transmitting module 1 is used for transmitting laser and performing beam expanding, compressing and beam splitting to obtain multi-beam laser output, the echo signal transmitting module 2 is used for receiving echo signals generated by reflection of the multi-beam laser by a target and coupling the echo signals to the optical fiber end surfaces corresponding to the optical fiber array to output multi-beam echo signals, the echo signals correspond to the multi-beam laser one by one, and the echo signal receiving module 3 is used for receiving the multi-beam echo signals output by the echo signal transmitting module 2, and respectively performing collimation, convergence and coupling on pixels corresponding to the detector.
Example 2
As shown in fig. 2, a multi-beam transceiving optical system comprises a laser beam splitting and transmitting module 1, an echo signal transmission module 2 disposed at one side of the laser beam splitting and transmitting module 1, and an echo signal receiving module 3 electrically connected to the echo signal transmission module 2;
the device comprises a laser beam splitting and transmitting module 1, an echo signal transmitting module 2, an echo signal receiving module 3 and an echo signal transmitting module, wherein the laser beam splitting and transmitting module 1 is used for transmitting laser and performing beam expanding, compressing and beam splitting to obtain multi-beam laser output, the echo signal transmitting module 2 is used for receiving echo signals generated by reflection of the multi-beam laser by a target and coupling the echo signals to optical fiber end faces corresponding to an optical fiber array to output multi-beam echo signals, the echo signals correspond to the multi-beam laser one by one, and the echo signal receiving module 3 is used for receiving the multi;
the laser beam splitting and transmitting module 1 comprises a laser 11, a laser beam expander 12 and a diffraction beam splitting module 13 which are sequentially arranged, the laser 11 is used for transmitting laser to the laser beam expander 12, the laser beam expander 12 is used for receiving the laser transmitted by the laser 11, expanding the laser, compressing divergence angles, and then transmitting the laser to the diffraction beam splitting module 13, and the beam splitting module 13 is used for receiving the laser expanded by the laser beam expander 12 and splitting the laser into multi-beam laser to be output;
as shown in fig. 3-4, the multi-beam laser is 64 laser beams with equally spaced angles and the same single beam divergence angle; the separation angle is 333uRad, and the single-beam divergence angle is 50 uRad;
the output mode of the laser 11 is optical fiber output, the diameter of an optical fiber core is 25 mu m, and NA is 0.08;
the aperture of the laser beam expander 12 is 80mm, and the effective focal length is 500 mm;
the echo signal transmission module 2 comprises an image space telecentric optical system 21 and an area array optical fiber array 22 which are sequentially connected, the image space telecentric optical system 21 is used for receiving echo signals generated by the reflection of multi-beam laser by a target and is coupled to the optical fiber end surface corresponding to the area array optical fiber array 22, and the area array optical fiber array 22 is used for outputting the echo signals coupled by the image space telecentric optical system 21 to the echo signal receiving module 3;
the image space telecentric optical system 21 is a telescope with an effective aperture of 100mm, a total field of view of 0.4 degree and an emergent ray parallel to the optical axis, and the single-beam receiving field angle of the telescope is 144 urad;
as shown in fig. 5-6, one end of the area array fiber array 22 is arranged into a 16 × 4 array, and the arrangement mode is the same as the laser emitting pin point arrangement mode of the laser beam splitting and emitting module 1, and the end is arranged at the telescope focal plane for receiving echo signals; the other end of the area array optical fiber array 22 is arranged into 4 multiplied by 4 area arrays, which correspond to the echo signal receiving module 3;
the echo signal receiving module 3 comprises a double telecentric optical system 31, a single photon detector group 32 and an optical filter 33 arranged on one side of the double telecentric optical system 31 which are sequentially arranged, and the double telecentric optical system 31 is electrically connected with the echo signal transmission module 2;
as shown in fig. 7, the double telecentric optical system 31 is configured to receive multiple echo signals output by the echo signal transmission module 2, collimate, converge, and couple the multiple echo signals to pixels corresponding to the single photon detector group 32, and the optical filter 33 is configured to filter stray light;
the group of single photon detectors 32 comprises 4 x 4 single photon detectors.
Example 3
As shown in fig. 2, a multi-beam transceiving optical system comprises a laser beam splitting and transmitting module 1, an echo signal transmission module 2 disposed at one side of the laser beam splitting and transmitting module 1, and an echo signal receiving module 3 electrically connected to the echo signal transmission module 2;
the device comprises a laser beam splitting and transmitting module 1, an echo signal transmitting module 2, an echo signal receiving module 3 and an echo signal transmitting module, wherein the laser beam splitting and transmitting module 1 is used for transmitting laser and performing beam expanding, compressing and beam splitting to obtain multi-beam laser output, the echo signal transmitting module 2 is used for receiving echo signals generated by reflection of the multi-beam laser by a target and coupling the echo signals to optical fiber end faces corresponding to an optical fiber array to output multi-beam echo signals, the echo signals correspond to the multi-beam laser one by one, and the echo signal receiving module 3 is used for receiving the multi;
the laser beam splitting and transmitting module 1 comprises a laser 11, a laser beam expander 12 and a diffraction beam splitting module 13 which are sequentially arranged, the laser 11 is used for transmitting laser to the laser beam expander 12, the laser beam expander 12 is used for receiving the laser transmitted by the laser 11, expanding the laser, compressing divergence angles, and then transmitting the laser to the diffraction beam splitting module 13, and the beam splitting module 13 is used for receiving the laser expanded by the laser beam expander 12 and splitting the laser into multi-beam laser to be output;
the multi-beam laser is 64 laser beams with equal interval angles and the same single beam divergence angle; the separation angle is 333uRad, and the single-beam divergence angle is 50 uRad;
the output mode of the laser 11 is optical fiber output, the diameter of an optical fiber core is 25 mu m, and NA is 0.08;
as shown in fig. 3-4, the aperture of the laser beam expander 12 is 80mm, the effective focal length is 500mm, and the divergence angle of the expanded laser beam is 50 urad. The diffraction spectroscope (DOE) divides the expanded laser into 64 uniform beams to realize the emission of 64 laser beams;
the echo signal transmission module 2 comprises an image space telecentric optical system 21 and an area array optical fiber array 22 which are sequentially connected, the image space telecentric optical system 21 is used for receiving echo signals generated by the reflection of multi-beam laser by a target and is coupled to the optical fiber end surface corresponding to the area array optical fiber array 22, and the area array optical fiber array 22 is used for outputting the echo signals coupled by the image space telecentric optical system 21 to the echo signal receiving module 3;
the image space telecentric optical system 21 is a telescope with an effective aperture of 100mm and a total field of view of 0.4 degrees, emergent rays of which are parallel to the optical axis, the single-beam receiving field angle of the telescope is 144urad, and in order to ensure the coupling efficiency of echo signals to optical fibers, the telescope is designed into the image space telecentric optical system, and the emergent rays of the telescope are parallel to the optical axis, so that the image magnification ratio in a certain range can not change along with the difference of object distances;
as shown in fig. 5-6, one end of the area array fiber array 22 is arranged into a 16 × 4 array, and the arrangement mode is the same as the laser emitting pin point arrangement mode of the laser beam splitting and emitting module 1, and the end is arranged at the telescope focal plane for receiving echo signals; the other end of the area array optical fiber array 22 is arranged into 4 multiplied by 4 area arrays, which correspond to the echo signal receiving module 3;
the echo signal receiving module 3 comprises a double telecentric optical system 31, a single photon detector group 32 and an optical filter 33 arranged on one side of the double telecentric optical system 31 which are sequentially arranged, and the double telecentric optical system 31 is electrically connected with the echo signal transmission module 2;
as shown in fig. 7, the double telecentric optical system 31 is configured to receive multiple echo signals output by the echo signal transmission module 2, collimate, converge, and couple the multiple echo signals to pixels corresponding to the single photon detector group 32, and the optical filter 33 is configured to filter stray light; the numerical aperture of the optical fiber (the value affects the angle of the output optical fiber), the size of the optical fiber area array corresponding to the array single photon detector end, the optical fiber arrangement, the size of the area array single photon detector pixel, the pixel interval and other parameters are comprehensively considered during the design of the double telecentric optical system, multiple echo signals output by the area array optical fiber can be respectively collimated and converged, the multi-channel echo signals and the area array single photon detector pixel one-to-one correspondence can be ensured, and the optical filter is used for filtering stray light.
The group of single photon detectors 32 comprises 4 x 4 single photon detectors.
The method of use of examples 1-3 was:
after the laser 11 emits light, the laser beam expander 12 expands the laser beam, the laser beam is divided into 64 laser beams by the diffraction beam splitting module (DOE)13 to be emitted by a laser dot matrix, the emitted laser beam is reflected by a target and then received by the telescope 21, the telescope 21 couples an echo signal into the corresponding area array optical fiber array 22 at an image plane, and the echo signal is transmitted to the photosensitive surface corresponding to the single photon detector group 32 after passing through the area array optical fiber array 22, the optical filter 33 and the double telecentric optical system 31. The area array optical fiber array 22 is arranged in 64 beams at the image surface of the telescope 21, and is divided into 4 × 4 area arrays at the 3 end of the single photon detector group, and the 4 × 4 area arrays correspond to the 4 × 4 single photon detectors.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A multi-beam transmit-receive optical system, comprising: the device comprises a laser beam splitting and transmitting module (1), an echo signal transmission module (2) arranged on one side of the laser beam splitting and transmitting module (1) and an echo signal receiving module (3) electrically connected with the echo signal transmission module (2);
the laser beam splitting and transmitting module (1) is used for transmitting laser, expanding, compressing and splitting into multi-beam laser beams, outputting the multi-beam laser beams, the echo signal transmitting module (2) is used for receiving echo signals generated by reflection of the multi-beam laser beams by a target and coupling the echo signals to an optical fiber end face corresponding to an optical fiber array to output multi-beam echo signals, the echo signals correspond to the multi-beam laser beams one by one, and the echo signal receiving module (3) is used for receiving the multi-beam echo signals output by the echo signal transmitting module (2) to collimate, converge and couple the multi-beam echo signals to pixels corresponding to a detector.
2. The multi-beam transmit-receive diversity optical system of claim 1, wherein: the laser beam splitting and transmitting module (1) comprises a laser (11), a laser beam expander (12) and a diffraction beam splitting module (13) which are sequentially arranged, wherein the laser (11) is used for transmitting laser to the laser beam expander (12), the laser beam expander (12) is used for receiving the laser transmitted by the laser (11), expanding and compressing divergence angles of the laser, and then transmitting the laser to the diffraction beam splitting module (13), and the beam splitting module (13) is used for receiving the laser expanded by the laser beam expander (12) and splitting the laser into multi-beam laser output.
3. The multi-beam transmit-receive diversity optical system of claim 2, wherein: the multi-beam laser is 64 laser beams with equal interval angles and the same single beam divergence angle.
4. The multi-beam transmit-receive diversity optical system of claim 3, wherein: the separation angle is 333uRad and the single beam divergence angle is 50 uRad.
5. The multi-beam transmit-receive diversity optical system of claim 2, wherein: the output mode of the laser (11) is optical fiber output, the diameter of the optical fiber core is 25 mu m, and NA is 0.08;
the aperture of the laser beam expander (12) is 80mm, and the effective focal length is 500 mm.
6. The multi-beam transmit-receive diversity optical system of claim 1, wherein: the echo signal transmission module (2) comprises an image space telecentric optical system (21) and an area array optical fiber array (22) which are sequentially connected, the image space telecentric optical system (21) is used for receiving echo signals generated by the multi-beam laser reflected by a target and coupling the echo signals to the corresponding optical fiber end face of the area array optical fiber array (22), and the area array optical fiber array (22) is used for outputting the echo signals coupled by the image space telecentric optical system (21) to the echo signal receiving module (3).
7. The multi-beam transmit-receive diversity optical system of claim 6, wherein: the image space telecentric optical system (21) is a telescope with an effective aperture of 100mm, a total field of view of 0.4 degrees and an emergent ray parallel to the optical axis, and the single-beam receiving field angle of the telescope is 144 urad.
8. The multi-beam transmit-receive diversity optical system of claim 7, wherein: one end of the area array optical fiber array (22) is arranged into a 16 x 4 array, the arrangement mode of the area array optical fiber array is consistent with the arrangement mode of laser emitting foot points of the laser beam splitting and emitting module (1), and the end is arranged at the focal plane of the telescope and used for receiving the echo signal; the other end of the area array optical fiber array (22) is arranged into 4 multiplied by 4 area arrays corresponding to the echo signal receiving module (3).
9. The multi-beam transmit-receive diversity optical system of claim 1, wherein: the echo signal receiving module (3) comprises a double telecentric optical system (31), a single photon detector group (32) and an optical filter (33) arranged on one side of the double telecentric optical system (31) in sequence, and the double telecentric optical system (31) is electrically connected with the echo signal transmitting module (2);
the double telecentric optical system (31) is used for receiving the multiple echo signals output by the echo signal transmission module (2) and respectively collimating, converging and coupling the multiple echo signals to pixels corresponding to the single photon detector group (32), and the optical filter (33) is used for filtering stray light.
10. The multi-beam transmit-receive diversity optical system of claim 9, wherein: the group of single photon detectors (32) comprises 4 x 4 single photon detectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011267239.7A CN112558039B (en) | 2020-11-13 | 2020-11-13 | Multi-beam receiving and transmitting different optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011267239.7A CN112558039B (en) | 2020-11-13 | 2020-11-13 | Multi-beam receiving and transmitting different optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112558039A true CN112558039A (en) | 2021-03-26 |
| CN112558039B CN112558039B (en) | 2023-07-11 |
Family
ID=75042085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011267239.7A Active CN112558039B (en) | 2020-11-13 | 2020-11-13 | Multi-beam receiving and transmitting different optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112558039B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114859378A (en) * | 2022-04-22 | 2022-08-05 | 中国科学院光电技术研究所 | Multi-element parallel scanning photon counting laser radar |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403866A (en) * | 2008-11-18 | 2009-04-08 | 上海微电子装备有限公司 | Object position measurement apparatus and method |
| CN109188451A (en) * | 2018-10-15 | 2019-01-11 | 北京径科技有限公司 | A kind of laser radar system |
-
2020
- 2020-11-13 CN CN202011267239.7A patent/CN112558039B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403866A (en) * | 2008-11-18 | 2009-04-08 | 上海微电子装备有限公司 | Object position measurement apparatus and method |
| CN109188451A (en) * | 2018-10-15 | 2019-01-11 | 北京径科技有限公司 | A kind of laser radar system |
Non-Patent Citations (2)
| Title |
|---|
| ZHAOHUI LI 等: ""Multi-beam single-photon-counting three-dimensional imaging lidar"", 《OPTICS EXPRESS》 * |
| 刘鸿彬 等: ""一种少光子高精度多波束激光雷达***及验证"", 《红外与毫米波学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114859378A (en) * | 2022-04-22 | 2022-08-05 | 中国科学院光电技术研究所 | Multi-element parallel scanning photon counting laser radar |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112558039B (en) | 2023-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109298410B (en) | Ocean oil spill detection laser radar | |
| CN110488247B (en) | Two-dimensional MEMS scanning galvanometer laser radar system | |
| CN110333511B (en) | Transmit-receive synchronous laser radar optical system | |
| CN107703517B (en) | Airborne multi-beam optical phased array laser three-dimensional imaging radar system | |
| US7978312B2 (en) | Three-dimensional range imaging apparatus and method | |
| CN112558102B (en) | Airborne oblique laser three-dimensional measurement and composite imaging system and application method thereof | |
| CN110187357A (en) | The Laser Active Imaging System Used of 3-D image reconstruct | |
| CN110553599A (en) | high-resolution high-speed laser three-dimensional imaging system | |
| CN113030911A (en) | Laser radar system | |
| CN109975790A (en) | A kind of reception device of multi-wavelength laser radar | |
| CN112558039B (en) | Multi-beam receiving and transmitting different optical system | |
| CN106772420A (en) | The continuous ray laser radar system of EO-1 hyperion of finely ground particles detection under water | |
| US8081302B2 (en) | Multimode optical sensor | |
| CN211653130U (en) | Laser emission array, scanning device, laser radar, intelligent vehicle and unmanned aerial vehicle | |
| CN207882442U (en) | The continuous ray laser radar system of EO-1 hyperion of underwater finely ground particles detection | |
| CN109541545B (en) | Multi-wavelength laser space positioning system and method | |
| CN108845329B (en) | Integrated system of annular visual field | |
| CN113376615B (en) | Transmitting system capable of remarkably reducing height of laser radar | |
| CN116840854B (en) | Single-photon laser radar optical system for aerosol detection | |
| CN112888957B (en) | Laser emission device, laser radar and intelligent induction equipment | |
| CN113655500A (en) | Optical detection method for measuring atmospheric data based on laser radar | |
| CN114690796A (en) | Relative positioning system and method for distance measurement between unmanned aerial vehicles | |
| CN112946666A (en) | Laser radar system | |
| Yang et al. | Adaptive wavelength scanning lidar (AWSL) for 3d mapping from space | |
| WO2024036582A1 (en) | Transmitting module, receiving module, detection apparatus, and terminal device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |