CN109387849A - A kind of coaxial laser range unit - Google Patents
A kind of coaxial laser range unit Download PDFInfo
- Publication number
- CN109387849A CN109387849A CN201811473559.0A CN201811473559A CN109387849A CN 109387849 A CN109387849 A CN 109387849A CN 201811473559 A CN201811473559 A CN 201811473559A CN 109387849 A CN109387849 A CN 109387849A
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- Prior art keywords
- mirror
- range unit
- laser range
- laser
- coaxial
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- 238000007493 shaping process Methods 0.000 claims abstract description 29
- 230000003287 optical effect Effects 0.000 claims abstract description 25
- 230000011514 reflex Effects 0.000 claims abstract description 7
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 239000003292 glue Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 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
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- 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 present invention provides a kind of coaxial laser range unit, coaxial laser range unit includes laser, collimating mirror and receiving element, coaxial laser range unit further includes shaping mirror, first mirror and the second mirror, the reception beam that first mirror passes through collimating mirror reflexes to the second mirror, second mirror reflexes to receiving element for beam is received, optical axis of the laser beam from shaping mirror to collimating mirror is the first optical path, receiving element is directed toward from the second mirror and the direction for being parallel to the axis of collimating mirror is first direction, first optical path and first direction form angle a, angle a magnitude range is 90 ° of < angle a≤180 °.The shaping of the laser beam that laser is emitted successively shaped mirror, collimating mirror, limitation caused by the laser optical angle of divergence and collimating mirror focal length is greatly decreased, laser beam is avoided to cause energy to reduce because of focal length limitation, first mirror and the second microscope group, which close to increase, receives beam reception focal length, reception beam energy is further increased, to increase the laser energy that receiving element receives.
Description
Technical field
The present invention relates to laser ranging technique fields, more particularly, to a kind of coaxial laser range unit.
Background technique
Existing laser ranging measuring system includes laser and receiving element, and laser emits laser beam, laser beam
It is directed toward target object, the light beam that laser beam is reflected and/or scattered through target object is to receive beam, and receiving element is received and penetrated
Beam.Chinese invention patent CN201210157986.4 discloses a kind of measuring device for range measurement comprising a structure
As beam source electro-optical package, one be configured to the electro-optical package of detector, a beam-shaping optical frames, beam point
With optical frames, however, the beam source is because by the influence that is limited of divergence angle collimation focal length, and cause to reflect on target object
With or scattering receive beam energy reduce.
Summary of the invention
The main object of the present invention is to provide a kind of coaxial laser ranging dress of the influence at divergence angle for reducing light source
It sets.
To realize above-mentioned main purpose, coaxial laser range unit provided by the invention, including laser, collimating mirror and
The laser beam of receiving element, laser transmitting passes through collimating mirror, receives beam and is received part reception, coaxial laser range unit is also
Including shaping mirror, the first mirror and the second mirror, laser, shaping mirror, the first mirror and collimating mirror are sequentially arranged, the first mirror passes through
The reception beam of collimating mirror reflexes to the second mirror, and the second mirror will receive beam and reflex to receiving element, laser beam from shaping mirror extremely
The optical axis of collimating mirror is the first optical path, is directed toward receiving element from the second mirror and the direction for being parallel to the axis of collimating mirror is first party
To the first optical path and first direction form angle a, and angle a size is 90 ° of < angle a≤180 °.
By above scheme as it can be seen that the shaping of the laser beam that is emitted of laser successively shaped mirror, collimating mirror, shaping mirror
First the divergence angle shaping of laser beam is become smaller, collimating mirror carries out collimating and correcting again, changes light source component divergence angle
The limitation of collimating mirror focal length, while solving the problems, such as that focal length limitation causes to receive beam energy reduction.First mirror and the second microscope group are closed
Increase and receive beam and receive focal length, more further increase reception beam energy, thus improve on target object reflection and or dissipate
Penetrate the laser energy for receiving beam.
One Preferable scheme is that, coaxial laser range unit includes shell portion and the branch for being mutually removably secured connection
Frame, laser are assemblied in shell portion, and the first mirror and the second mirror, which are removably secured, is assemblied in bracket, and the outer wall in shell portion is cylindric.
One Preferable scheme is that, coaxial laser range unit include first, first outer wall is movably connected
Inner wall in shell portion, shaping mirror are assemblied in first inner wall.
One Preferable scheme is that, coaxial laser range unit include second, second outer wall is movably connected
Inner wall in shell portion, collimating mirror are assemblied in second inner wall.
One Preferable scheme is that, bracket includes first, second and third portion, and the first end of the first mirror is connected in the
In one, the second end fixation of the first mirror is connected to second, and the second mirror is detachably secured to third portion.
One Preferable scheme is that, the first mirror is provided with light hole, light passing gap is provided between first and second,
Laser beam sequentially passes through light hole and light passing gap.
One Preferable scheme is that, light hole is circular hole, light passing gap be it is cylindric, light hole and light passing gap are coaxial
Setting.
One Preferable scheme is that, receiving element is connected to the circuit board of coaxial laser ranging system, and circuit board is removably
It is fixed on the end face of coaxial laser range unit.
One Preferable scheme is that, laser is photodiode.
One Preferable scheme is that, bracket is cylindrical body.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of coaxial laser range unit embodiment of the invention.
The invention will be further described with reference to the accompanying drawings and embodiments.
Specific embodiment
Referring to Fig. 1, the coaxial laser range unit 10 that can be applied to the present embodiment of laser ranging measuring system includes swashing
Light device 1, collimating mirror 3 and receiving element 6, the laser beam that laser 1 emits pass through collimating mirror 3, and reception beam is received part 6 and connects
It receives, coaxial laser range unit 10 further includes shaping mirror 2, the first mirror 4 and the second mirror 5, laser 1, shaping mirror 2,4 and of the first mirror
Collimating mirror 3 is sequentially arranged, and the reception beam that the first mirror 4 passes through collimating mirror 3 reflexes to the second mirror 5, and the second mirror 5 will receive beam
Reflex to receiving element 6.
Optical axis 101 of the laser beam from shaping mirror 2 to collimating mirror 3 be the first optical path, from the second mirror 5 be directed toward receiving element 6 and
The direction for being parallel to the axis of collimating mirror 3 is first direction, and the first optical path and first direction form angle a, and angle a size is
90 ° of < angle a≤180 °.In the present embodiment, the size of angle a is 180 °.Receiving element 6 is connected to coaxial laser ranging system 10
Circuit board 22, circuit board 22 is detachably secured to the end face of coaxial laser range unit 10.Shaping mirror 2 is located at the first mirror 4
Between laser 1.Laser 1 is photodiode, and collimating mirror 3 and shaping mirror 2 are collimation lens, collimating mirror 3 and shaping
Mirror 2 is coaxial arrangement.
Coaxial laser range unit 10 includes shell portion 20 and the bracket 21 for being mutually removably secured connection, and laser 1 fills
Assigned in shell portion 20, laser 1 can directly fasten insertion and be connected to shell portion 20, and the first mirror 4 and the second mirror 5 are removably secured dress
Assigned in bracket 21, the outer wall in shell portion 20 be it is cylindric, bracket 21 is cylindrical body.Coaxial laser range unit 10 includes first
26, first 26 outer wall is movably connected in the inner wall in shell portion 20, and first 26 outer wall and the inner wall in shell portion 20 are spiral shell
The inner wall in line connection, first 26 outer wall and shell portion 20 can also be for clearance fit or transition fit and to pass through glue mutually solid
Fixed bonding, shaping mirror 2 are assemblied in first 26 inner wall, and first 26 can adjust shaping mirror 2 along the axial movement of optical axis 101
Position.Coaxial laser range unit 10 includes second 23, and second 23 outer wall is movably connected in shell portion 20
Wall, second 23 outer wall are is threadedly coupled with the inner wall in shell portion 20, and the inner wall in second 23 outer wall and shell portion 20 can also
It being fixed to each other bonding for clearance fit or transition fit and by glue, collimating mirror 3 is assemblied in second 23 inner wall, and second
23 adjust the position of collimating mirror 3 along the axial movement of optical axis 101.Shell portion 20 can mutually be interlocked with bracket 21 by guide screw 29
It is tightly connected, shell portion 20 and bracket 21 can be also mutually bonded by glue.Circuit board 22 is detachably secured to the end face in shell portion 20,
Circuit board 22 can be slided in 20 end face of shell portion to determine the accurate location for adjusting receiving element 6.Determine the accurate location of receiving element 6
Afterwards, circuit board 22 and shell portion 20 are mutually locked by screw 30, or by glue fixed form to realize circuit board
Connection between 22 and shell portion 20.
Bracket 21 includes first 51, second 52 and third portion 53, and the first end of the first mirror 4 is connected in first 51
Interior, the second end fixation of the first mirror 4 is connected to second 52, and the second mirror 5 is detachably secured to third portion 53.First mirror 4 is set
It is equipped with light hole 31, light passing gap 15 is provided between first 51 and second 52, laser beam sequentially passes through light passing gap
15 and light hole 31.Light hole 31 is circular hole, light passing gap 15 be it is cylindric, light hole 31 and light passing gap 15 are coaxially to set
It sets.
Referring to Fig. 1, the laser beam that laser 1 is emitted successively passes through shaping mirror 2, light passing gap 15,31 and of light hole
Homed on its target object 100 after collimating mirror 3, target object 100 reflection and/or scattering reception beam after collimating mirror 3 successively
Receiving element 6 is reflexed to by the first mirror 4 and the second mirror 5, beam is received and is received the reception of part 6, laser ranging measuring system is according to connecing
The received reception beams of the institute of addressee 6 and calculate institute's ranging from.
Double dot dash line in Fig. 1 show laser beam, and dotted line, which is shown, receives beam institute, and laser beam is from shaping mirror 2
Optical axis 101 to collimating mirror 3 is the first optical path, is parallel to from the optical axis 103 of the reception beam 102 of 5 directive receiving element 6 of the second mirror
Second direction.The shaping of the laser beam that laser 1 is emitted successively shaped mirror 2, collimating mirror 3, shaping mirror 2 first penetrate laser
The divergence angle shaping of beam becomes smaller, and the laser beam of the shaped shaping for the first time of mirror 2 sequentially passes through light passing gap 15 along optical axis 101
After light hole 31, collimating mirror 3 carries out collimating and correcting to laser beam, and the laser optical angle of divergence is greatly decreased and collimating mirror is burnt
Away from generated limitation, avoids laser beam from causing energy to reduce because of focal length limitation, further improve and reflected on object
With or the laser energy that receives of scattering.Laser beam after collimating mirror 3 again collimating and correcting emits along optical axis 105
To target object 100, the reception beam of the reflection of target object 100 and/or scattering is after collimating mirror 3 successively through the first mirror 4
Echo area and the echo area of the second mirror 5 are reflected onto the reception window of receiving element 6, and optical axis 103 is from 5 directive receiving element of the second mirror
The optical axis of 6 reception beam 102.The echo area of first mirror 4 and the echo area of the second mirror 5 be mirror face reflection coating face in addition,
The reception beam that first mirror 4 and the second mirror 5 can increase collimating mirror 3 receives focal length, increases and receives beam energy to enable receiving element institute
The laser energy received increases, to extend laser distance measuring range and receive convenient for 6 pairs of reception beams of receiving element.
Finally it is emphasized that the present invention is not limited to the above embodiments, the foregoing is merely preferable realities of the invention
Example is applied, is not intended to limit the invention, all within the spirits and principles of the present invention, made any modification is equally replaced
It changes, improve, should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of coaxial laser range unit, including laser, collimating mirror and receiving element, the laser beam of the laser transmitting
Across the collimating mirror, receives beam and is received by the receiving element, it is characterised in that:
The coaxial laser range unit further includes shaping mirror, the first mirror and the second mirror, the laser, the shaping mirror, institute
It states the first mirror and the collimating mirror is sequentially arranged, the reception beam that first mirror passes through the collimating mirror reflexes to institute
The second mirror is stated, the reception beam is reflexed to the receiving element by second mirror,
The laser beam is the first optical path from the shaping mirror to the optical axis of the collimating mirror, described in second mirror direction
The receiving element and direction for being parallel to the axis of the collimating mirror is first direction, first optical path formed with the first direction
Angle a, the angle a size are angle a≤180 ° described in 90 ° of <.
2. coaxial laser range unit according to claim 1, it is characterised in that:
The coaxial laser range unit includes shell portion and the bracket for being mutually removably secured connection, and the laser is assemblied in
The shell portion, first mirror and second mirror, which are removably secured, is assemblied in the bracket, and the outer wall in the shell portion is circle
Column.
3. coaxial laser range unit according to claim 2, it is characterised in that:
The coaxial laser range unit includes first, and first outer wall is movably connected in the shell portion
Wall, the shaping mirror are assemblied in first inner wall.
4. coaxial laser range unit according to claim 2, it is characterised in that:
The coaxial laser range unit includes second, and second outer wall is movably connected in the shell portion
Wall, the collimating mirror are assemblied in second inner wall.
5. coaxial laser range unit according to claim 2, it is characterised in that:
The bracket includes first, second and third portion, and the first end of first mirror is connected in described first, institute
The second end fixation for stating the first mirror is connected to described second, and second mirror is detachably secured to the third portion.
6. coaxial laser range unit according to claim 5, it is characterised in that:
First mirror is provided with light hole, described first and it is second described between be provided with light passing gap, the laser
Beam sequentially passes through the light hole and the light passing gap.
7. coaxial laser range unit according to claim 6, it is characterised in that:
The light hole is circular hole, the light passing gap be it is cylindric, the light hole and the light passing gap are coaxial arrangement.
8. coaxial laser range unit according to any one of claims 1 to 7, it is characterised in that:
The receiving element is connected to the circuit board of the coaxial laser range unit, and the circuit board is detachably secured to described
The end face of the coaxial laser range unit.
9. coaxial laser range unit according to any one of claims 1 to 7, it is characterised in that:
The light source component laser is photodiode.
10. according to the described in any item coaxial laser range units of claim 2 to 7, it is characterised in that:
The bracket is cylindrical body.
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 true CN109387849A (en) | 2019-02-26 |
| CN109387849B CN109387849B (en) | 2024-06-04 |
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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) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109814087A (en) * | 2019-03-11 | 2019-05-28 | 上海禾赛光电科技有限公司 | Laser transmitting-receiving module and laser radar system |
| WO2021072752A1 (en) * | 2019-10-18 | 2021-04-22 | 深圳市大疆创新科技有限公司 | Laser diode encapsulation module, distance detection apparatus, and electronic device |
| WO2023115322A1 (en) * | 2021-12-21 | 2023-06-29 | 深圳市长毛象电子有限公司 | Laser rangefinder and method for adjusting same |
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| CN109814087A (en) * | 2019-03-11 | 2019-05-28 | 上海禾赛光电科技有限公司 | Laser transmitting-receiving module and laser radar system |
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| Publication number | Publication date |
|---|---|
| CN109387849B (en) | 2024-06-04 |
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