CN109387849B - Coaxial laser range unit - Google Patents
Coaxial laser range unit Download PDFInfo
- Publication number
- CN109387849B CN109387849B CN201811473559.0A CN201811473559A CN109387849B CN 109387849 B CN109387849 B CN 109387849B CN 201811473559 A CN201811473559 A CN 201811473559A CN 109387849 B CN109387849 B CN 109387849B
- Authority
- CN
- China
- Prior art keywords
- mirror
- ranging device
- laser
- laser ranging
- light
- 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.)
- Active
Links
- 238000007493 shaping process Methods 0.000 claims abstract description 29
- 230000003287 optical effect Effects 0.000 claims abstract description 26
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000003292 glue Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention provides a coaxial laser ranging device, which comprises a laser, a collimating mirror, a receiving piece, a shaping mirror, a first mirror and a second mirror, wherein the first mirror reflects a receiving beam passing through the collimating mirror to the second mirror, the second mirror reflects the receiving beam to the receiving piece, the optical axis of the laser beam from the shaping mirror to the collimating mirror is a first light path, the direction from the second mirror to the receiving piece and parallel to the axis of the collimating mirror is a first direction, an included angle a is formed between the first light path and the first direction, and the included angle a is more than 90 degrees and less than or equal to 180 degrees. The laser beam emitted by the laser device is shaped by the shaping lens and the collimating lens in sequence, so that the limitation of the optical divergence angle of the laser device and the focal length of the collimating lens is greatly reduced, the energy reduction of the laser beam caused by the focal length limitation is avoided, the receiving focal length of the receiving beam is increased by combining the first lens and the second lens, and the energy of the receiving beam is further increased, so that the energy of the laser received by the receiving piece is increased.
Description
Technical Field
The invention relates to the technical field of laser ranging, in particular to a coaxial laser ranging device.
Background
The existing laser ranging measurement system comprises a laser and a receiving part, wherein the laser emits a laser beam, the laser beam is directed to a target object, a beam reflected and/or scattered by the laser beam is taken as a receiving beam, and the receiving part receives the receiving beam. Chinese patent CN201210157986.4 discloses a measuring device for distance measurement, comprising an electro-optical component configured as a beam source, an electro-optical component configured as a detector, a beam shaping optical mirror, a beam distributing optical mirror, however, the beam source is affected by the limitation of the collimation focal length of the optical divergence angle, resulting in a reduction of the energy of the reflected and/or scattered received beam on the target object.
Disclosure of Invention
The invention mainly aims to provide an on-axis laser ranging device for reducing the influence of an optical divergence angle of a light source.
In order to achieve the main purpose, the coaxial laser ranging device provided by the invention comprises a laser, a collimating mirror, a receiving piece, a shaping mirror, a first mirror, a second mirror, a laser, a shaping mirror, a first mirror and a collimating mirror, wherein the laser beam emitted by the laser passes through the collimating mirror, the receiving beam is received by the receiving piece, the laser, the shaping mirror, the first mirror and the collimating mirror are sequentially arranged, the first mirror reflects the receiving beam passing through the collimating mirror to the second mirror, the second mirror reflects the receiving beam to the receiving piece, the optical axis of the laser beam from the shaping mirror to the collimating mirror is a first optical path, the direction which is directed to the receiving piece from the second mirror and is parallel to the axis of the collimating mirror is a first direction, an included angle a is formed between the first optical path and the first direction, and the included angle a is more than or equal to 90 degrees and less than or equal to 180 degrees.
According to the scheme, the laser beam emitted by the laser device is shaped by the shaping lens and the collimating lens in sequence, the optical divergence angle of the laser beam is shaped to be smaller by the shaping lens, the collimating lens performs collimation shaping again, the focal length limitation of the optical divergence angle collimating lens of the light source part is changed, and meanwhile the problem of energy reduction of the received beam caused by the focal length limitation is solved. The first and second mirrors in combination increase the receive focal length of the receive beam, further increasing the receive beam energy, thereby increasing the laser energy reflected and/or scattered from the receive beam at the target object.
In a preferred embodiment, the coaxial laser ranging device comprises a shell and a support detachably and fixedly connected with each other, the laser is assembled on the shell, the first mirror and the second mirror are detachably and fixedly assembled on the support, and the outer wall of the shell is cylindrical.
In a preferred embodiment, the coaxial laser distance measuring device comprises a first part, the outer wall of which is movably connected to the inner wall of the housing part, and the shaping mirror is mounted on the inner wall of the first part.
In a preferred embodiment, the coaxial laser distance measuring device comprises a second part, the outer wall of which is movably connected to the inner wall of the housing part, and the collimator lens is mounted on the inner wall of the second part.
In a preferred scheme, the bracket comprises a first part, a second part and a third part, the first end of the first mirror is clamped in the first part, the second end of the first mirror is fixedly abutted to the second part, and the second mirror is detachably fixed to the third part.
In a preferred embodiment, the first mirror is provided with a light-passing hole, a light-passing gap is provided between the first portion and the second portion, and the laser beam passes through the light-passing hole and the light-passing gap in sequence.
The preferred scheme is that the light-passing hole is a round hole, the light-passing gap is cylindrical, and the light-passing hole and the light-passing gap are coaxially arranged.
In a preferred embodiment, the receiving part is connected to a circuit board of the coaxial laser distance measuring device, which is detachably fastened to the end face of the coaxial laser distance measuring device.
In a preferred embodiment, the laser is a photodiode.
Preferably, the support is cylindrical.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the coaxial laser ranging device of the present invention.
The invention is further described below with reference to the drawings and examples.
Detailed Description
Referring to fig. 1, the coaxial laser ranging device 10 of the present embodiment, which is applicable to a laser ranging measurement system, includes a laser 1, a collimator lens 3, and a receiving element 6, a laser beam emitted from the laser 1 passes through the collimator lens 3, the receiving beam is received by the receiving element 6, the coaxial laser ranging device 10 further includes a shaping lens 2, a first mirror 4, and a second mirror 5, the laser 1, the shaping lens 2, the first mirror 4, and the collimator lens 3 are sequentially arranged, the first mirror 4 reflects the receiving beam passing through the collimator lens 3 to the second mirror 5, and the second mirror 5 reflects the receiving beam to the receiving element 6.
The optical axis 101 from the shaping mirror 2 to the collimating mirror 3 of the laser beam is a first optical path, the direction from the second mirror 5 to the receiving element 6 and parallel to the axis of the collimating mirror 3 is a first direction, the first optical path and the first direction form an included angle a, and the included angle a is more than 90 degrees and less than or equal to 180 degrees. In this embodiment, the included angle a is 180 °. The receiving member 6 is connected to a circuit board 22 of the coaxial laser ranging device 10, and the circuit board 22 is detachably fixed to an end face of the coaxial laser ranging device 10. The shaping mirror 2 is located between the first mirror 4 and the laser 1. The laser 1 is a photodiode, the collimating mirror 3 and the shaping mirror 2 are collimating lenses, and the collimating mirror 3 and the shaping mirror 2 are coaxially arranged.
The coaxial laser ranging device 10 comprises a shell part 20 and a support 21 which are detachably and fixedly connected with each other, the laser 1 is assembled on the shell part 20, the laser 1 can be directly fastened, fixedly embedded and connected to the shell part 20, the first mirror 4 and the second mirror 5 are detachably and fixedly assembled on the support 21, the outer wall of the shell part 20 is cylindrical, and the support 21 is cylindrical. The coaxial laser ranging device 10 includes a first member 26, an outer wall of the first member 26 is movably connected to an inner wall of the shell 20, the outer wall of the first member 26 is in threaded connection with the inner wall of the shell 20, the outer wall of the first member 26 and the inner wall of the shell 20 can also be in clearance fit or transition fit and are fixedly bonded to each other through glue, the shaping mirror 2 is assembled on the inner wall of the first member 26, and the first member 26 can move along an axial direction of the optical axis 101 to adjust a position of the shaping mirror 2. The coaxial laser ranging device 10 comprises a second piece 23, wherein the outer wall of the second piece 23 is movably connected to the inner wall of the shell 20, the outer wall of the second piece 23 is in threaded connection with the inner wall of the shell 20, the outer wall of the second piece 23 and the inner wall of the shell 20 can be in clearance fit or transition fit and are fixedly bonded with each other through glue, the collimating lens 3 is assembled on the inner wall of the second piece 23, and the second piece 23 moves along the axial direction of the optical axis 101 to adjust the position of the collimating lens 3. The shell 20 and the bracket 21 can be locked to each other by means of the guide screw 29, and the shell 20 and the bracket 21 can be bonded to each other by means of glue. The circuit board 22 is detachably fixed to an end surface of the housing portion 20, and the circuit board 22 is slidable on the end surface of the housing portion 20 to determine the accurate position of the adjustment receiving member 6. After the exact position of the receiving member 6 is determined, the circuit board 22 and the housing portion 20 are fastened to each other by means of screws 30 or the connection between the circuit board 22 and the housing portion 20 is achieved by means of glue fastening.
The bracket 21 includes a first portion 51, a second portion 52 and a third portion 53, the first end of the first mirror 4 is clamped in the first portion 51, the second end of the first mirror 4 is fixedly abutted against the second portion 52, and the second mirror 5 is detachably fixed to the third portion 53. The first mirror 4 is provided with a light-passing hole 31, and a light-passing gap 15 is provided between the first portion 51 and the second portion 52, and the laser beam passes through the light-passing gap 15 and the light-passing hole 31 in order. The light-passing hole 31 is a circular hole, the light-passing gap 15 is cylindrical, and the light-passing hole 31 and the light-passing gap 15 are coaxially arranged.
Referring to fig. 1, a laser beam emitted by a laser 1 sequentially passes through a shaping lens 2, a light passing gap 15, a light passing hole 31 and a collimating lens 3 and then irradiates a target object 100, a receiving beam reflected and/or scattered by the target object 100 sequentially passes through the collimating lens 3 and then is sequentially reflected by a first lens 4 and a second lens 5 to a receiving member 6, the receiving beam is received by the receiving member 6, and a laser ranging measurement system calculates a measured distance according to the receiving beam received by the receiving member 6.
In fig. 1, a two-dot chain line shows a laser beam, a broken line shows a receiving beam, an optical axis 101 of the laser beam from the shaping mirror 2 to the collimator 3 is a first optical path, and an optical axis 103 of a receiving beam 102 from the second mirror 5 to the receiving element 6 is parallel to the second direction. The laser beam emitted by the laser 1 is shaped by the shaping lens 2 and the collimating lens 3 in sequence, the optical divergence angle of the laser beam is shaped to be smaller by the shaping lens 2, the laser beam shaped by the shaping lens 2 firstly passes through the light passing gap 15 and the light passing hole 31 in sequence along the optical axis 101, and then the collimating lens 3 collimates and shapes the laser beam, so that the limitation of the optical divergence angle of the laser and the focal length of the collimating lens is greatly reduced, the energy reduction of the laser beam caused by the focal length limitation is avoided, and the laser energy received by reflection and/or scattering on a target object is further improved. The laser beam after being collimated and shaped again by the collimator lens 3 is emitted to the target object 100 along the optical axis 105, and the receiving beam reflected and/or scattered by the target object 100 passes through the collimator lens 3 and then is reflected into the receiving window of the receiving element 6 through the reflecting area of the first lens 4 and the reflecting area of the second lens 5 in sequence, and the optical axis 103 is the optical axis of the receiving beam 102 emitted from the second lens 5 to the receiving element 6. The reflecting area of the first mirror 4 and the reflecting area of the second mirror 5 are both specular reflection coating surfaces, in addition, the first mirror 4 and the second mirror 5 can increase the receiving focal length of the receiving beam of the collimating mirror 3, and increase the energy of the receiving beam so as to increase the energy of the laser received by the receiving element, thereby prolonging the measuring range of the laser measuring distance and facilitating the receiving element 6 to receive the receiving beam.
Finally, it should be emphasized that the present invention is not limited to the above-described embodiments, but is merely preferred embodiments of the invention, and any modifications, equivalents, improvements, etc. within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a coaxial laser rangefinder, includes laser instrument, collimating mirror and receiver, the laser beam of laser instrument transmission passes the collimating mirror, receive the beam by receiver receives its characterized in that:
the coaxial laser ranging device further comprises a shaping mirror, a first mirror and a second mirror, wherein the laser, the shaping mirror, the first mirror and the collimating mirror are sequentially arranged, the first mirror reflects the receiving beam passing through the collimating mirror to the second mirror, the second mirror reflects the receiving beam to the receiving piece,
The optical axis from the shaping mirror to the collimating mirror is a first light path, the direction from the second mirror to the receiving piece and parallel to the axis of the collimating mirror is a first direction, the first light path and the first direction form an included angle a, and the size of the included angle a is smaller than 90 degrees and smaller than or equal to 180 degrees;
The reflective area of the first mirror and the reflective area of the second mirror are specular reflection coating surfaces.
2. The coaxial laser ranging device of claim 1, wherein:
The coaxial laser ranging device comprises a shell part and a support, wherein the shell part and the support are detachably and fixedly connected with each other, the laser is assembled on the shell part, the first mirror and the second mirror are detachably and fixedly assembled on the support, and the outer wall of the shell part is cylindrical.
3. The coaxial laser ranging device of claim 2, wherein:
The coaxial laser ranging device comprises a first piece, the outer wall of the first piece is movably connected with the inner wall of the shell part, and the shaping mirror is assembled on the inner wall of the first piece.
4. The coaxial laser ranging device of claim 2, wherein:
the coaxial laser ranging device comprises a second piece, the outer wall of the second piece is movably connected with the inner wall of the shell part, and the collimating lens is assembled on the inner wall of the second piece.
5. The coaxial laser ranging device of claim 2, wherein:
The support comprises a first part, a second part and a third part, wherein the first end of the first mirror is clamped in the first part, the second end of the first mirror is fixedly abutted to the second part, and the second mirror is detachably fixed in the third part.
6. The coaxial laser ranging device of claim 5, wherein:
The first mirror is provided with a light-passing hole, a light-passing gap is arranged between the first part and the second part, and the laser beam sequentially passes through the light-passing hole and the light-passing gap.
7. The coaxial laser ranging device of claim 6, wherein:
the light-passing hole is a round hole, the light-passing gap is cylindrical, and the light-passing hole and the light-passing gap are coaxially arranged.
8. The in-line laser ranging device as claimed in any one of claims 1 to 7, wherein:
the receiving piece is connected to a circuit board of the coaxial laser ranging device, and the circuit board is detachably fixed on the end face of the coaxial laser ranging device.
9. The in-line laser ranging device as claimed in any one of claims 1 to 7, wherein:
The light source part laser is a photodiode.
10. The in-line laser ranging device as claimed in any one of claims 2 to 7, wherein:
the support is a cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811473559.0A CN109387849B (en) | 2018-12-04 | 2018-12-04 | Coaxial laser range unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811473559.0A CN109387849B (en) | 2018-12-04 | 2018-12-04 | Coaxial laser range unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109387849A CN109387849A (en) | 2019-02-26 |
| CN109387849B true CN109387849B (en) | 2024-06-04 |
Family
ID=65429858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811473559.0A Active CN109387849B (en) | 2018-12-04 | 2018-12-04 | Coaxial laser range unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109387849B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116299342A (en) * | 2019-03-11 | 2023-06-23 | 上海禾赛科技有限公司 | Laser radar system |
| CN113079708A (en) * | 2019-10-18 | 2021-07-06 | 深圳市大疆创新科技有限公司 | Laser diode packaging module, distance detection device and electronic equipment |
| DE112021002836T5 (en) | 2021-12-21 | 2023-08-10 | Shenzhen Mammoth Electronic Co., Ltd | LASER RANGEFINDER AND ADJUSTMENT METHOD |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299066A (en) * | 2007-04-30 | 2008-11-05 | 中国科学院安徽光学精密机械研究所 | Laser radar transmission type coaxial transmitting and receiving equipment |
| CN102798848A (en) * | 2011-05-26 | 2012-11-28 | 喜利得股份公司 | Measuring device for distance measuring |
| CN104898109A (en) * | 2015-05-20 | 2015-09-09 | 中国科学院合肥物质科学研究院 | Receiving-transmitting integrated cloud information measurement system with compact structure |
| CN106199991A (en) * | 2015-09-18 | 2016-12-07 | 王治霞 | Light splitting piece and the coaxial diastimeter of laser thereof and application |
| CN106482703A (en) * | 2016-12-20 | 2017-03-08 | 常州市新瑞得仪器有限公司 | A kind of theodolite with distance measurement function and its method of work |
| WO2018076600A1 (en) * | 2016-10-28 | 2018-05-03 | 深圳市镭神智能系统有限公司 | Time flight method-based laser radar system |
| CN108693516A (en) * | 2018-08-20 | 2018-10-23 | 中国科学院上海技术物理研究所 | A kind of device and method of quick measurement laser ranging system performance |
| CN209327577U (en) * | 2018-12-04 | 2019-08-30 | 珠海码硕科技有限公司 | A kind of coaxial laser range unit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6903811B2 (en) * | 2003-08-11 | 2005-06-07 | Kamakura Koki Co., Ltd. | Rangefinder binoculars |
| DE102011076491A1 (en) * | 2011-05-26 | 2012-11-29 | Esw Gmbh | Measuring device for distance measurement |
| DE102011089866A1 (en) * | 2011-12-23 | 2013-06-27 | Hilti Aktiengesellschaft | Measuring device for measuring a distance to a target object |
-
2018
- 2018-12-04 CN CN201811473559.0A patent/CN109387849B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299066A (en) * | 2007-04-30 | 2008-11-05 | 中国科学院安徽光学精密机械研究所 | Laser radar transmission type coaxial transmitting and receiving equipment |
| CN102798848A (en) * | 2011-05-26 | 2012-11-28 | 喜利得股份公司 | Measuring device for distance measuring |
| CN104898109A (en) * | 2015-05-20 | 2015-09-09 | 中国科学院合肥物质科学研究院 | Receiving-transmitting integrated cloud information measurement system with compact structure |
| CN106199991A (en) * | 2015-09-18 | 2016-12-07 | 王治霞 | Light splitting piece and the coaxial diastimeter of laser thereof and application |
| WO2018076600A1 (en) * | 2016-10-28 | 2018-05-03 | 深圳市镭神智能系统有限公司 | Time flight method-based laser radar system |
| CN106482703A (en) * | 2016-12-20 | 2017-03-08 | 常州市新瑞得仪器有限公司 | A kind of theodolite with distance measurement function and its method of work |
| CN108693516A (en) * | 2018-08-20 | 2018-10-23 | 中国科学院上海技术物理研究所 | A kind of device and method of quick measurement laser ranging system performance |
| CN209327577U (en) * | 2018-12-04 | 2019-08-30 | 珠海码硕科技有限公司 | A kind of coaxial laser range unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109387849A (en) | 2019-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109387849B (en) | Coaxial laser range unit | |
| JP3169082B2 (en) | Distance measuring device | |
| CN101506684B (en) | Laser scanner | |
| US9733066B2 (en) | Shape measuring method and device | |
| CN109031533B (en) | Dual-light-path receiving and transmitting integrated antenna based on Cassegrain telescope and receiving and transmitting method | |
| KR101415144B1 (en) | Remote optical axis alignment apparatus and method for aligning of optical axis using of the same | |
| CN104748673A (en) | Laser detection device | |
| WO2010010311A3 (en) | Optical device and method for measuring the rotation of an object | |
| CN101452076A (en) | Optical-mechanical system of semiconductor laser cloud height automatic measuring instrument | |
| JP2009510413A (en) | Two-sided reflector and two-side target object | |
| EP2884302B1 (en) | Photoelectric sensor | |
| WO2019208306A1 (en) | Light irradiation device and laser radar device | |
| TWI471581B (en) | Distance measuring device | |
| CN108427108B (en) | A coaxial integrated ray apparatus of receiving and dispatching for laser range unit | |
| CN209327577U (en) | A kind of coaxial laser range unit | |
| CN111007482B (en) | Laser radar device | |
| CA2985403C (en) | Device for optically measuring the distance from a reflective target object | |
| KR101821983B1 (en) | A ridar for sensing multi-distance point | |
| CN213957612U (en) | Laser radar receiving and transmitting co-located optical path system | |
| CN210181223U (en) | Compact laser radar ranging optical system | |
| CN103278933B (en) | A kind of portable adjustable H-shaped light path collimation device | |
| CN203191194U (en) | Lens scattered light detector with dual optical paths | |
| CN101872015A (en) | Laser ranging device | |
| CN108369347B (en) | Beam shaping unit, distance measuring device and laser lighting device | |
| CN110109136A (en) | A kind of compact laser radar range finding optical system |
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 |