CN109387851A - The device as inhibition speckle effect is moved using wave-front division in the imaging of range of triangle point coke - Google Patents
The device as inhibition speckle effect is moved using wave-front division in the imaging of range of triangle point coke Download PDFInfo
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- CN109387851A CN109387851A CN201811406179.5A CN201811406179A CN109387851A CN 109387851 A CN109387851 A CN 109387851A CN 201811406179 A CN201811406179 A CN 201811406179A CN 109387851 A CN109387851 A CN 109387851A
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- wave
- laser
- lens group
- chip arrays
- image detector
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- 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
- G01S17/46—Indirect determination of position data
- G01S17/48—Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves
-
- 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
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- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Measurement Of Optical Distance (AREA)
Abstract
The invention belongs to laser ranging fields, and disclose in a kind of imaging of range of triangle point coke the device moved using wave-front division as inhibiting speckle effect, the device includes transmitting unit and receiving unit, wherein: focus lens group is placed between laser and measured target in transmitting unit, laser for generating laser focuses to form a focal spot, is irradiated to the measured target surface；Two-dimentional glass chip arrays and receiving lens group are placed between photoelectric image detector and measured target in receiving unit, and the scattering light that measured target issues moves picture by two-dimentional glass chip arrays wave-front division, are formed multiple focal spot pictures and are received by the photoelectric image detector.The present invention can will scatter picture of the light wave-front division shifting as forming multiple focal spots by the way that two-dimentional glass chip arrays are arranged, the uncertainty measured in laser triangulation is effectively reduced using average method, and the lateral resolution of measuring device will not be sacrificed, there are wider array of application scenarios.
Description
Technical field
The invention belongs to laser ranging field, more particularly, to utilizing wave-front division in a kind of imaging of range of triangle point coke
Move the device as inhibiting speckle effect.
Background technique
Laser ranging is a kind of high-precision contactless distance measurement method, and wherein laser triangulation method passes through incidence
The distance of testee is calculated in the triangle that light and scattering light are constituted.
In laser triangulation method, the speckle effect of laser limits the accuracy of this method measurement.The speckle of laser is imitated
It should refer to when laser irradiation is in rough surface, since the face element of rough surface introduces phase difference, so that scattering light is in sky
Between middle superposition interference, form random light distribution so that in laser ranging method the positioning of hot spot exist it is uncertain, thus
Cause the uncertainty of measurement.
In order to inhibit the speckle effect of laser, the uncertainty of laser triangulation is reduced, mainly uses line focal spot at present
Instead of a method for focal spot illumination measured target.This method reaches inhibition using average effect and swashs by increasing measurement data amount
The purpose of the speckle effect of light, therefore the longer inhibitory effect of line focal spot length is better.But this method can sacrifice measurement significantly
The lateral resolution of device, because without good application prospect.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides benefits in a kind of imaging of range of triangle point coke
The device as inhibiting speckle effect is moved with wave-front division, wherein by increasing two-dimentional glass chip arrays near receiving lens group, it will
One focal spot wave-front division is moved as forming multiple focal spot pictures, and the uncertainty of measurement is reduced using the method for average, thus especially suitable
For carrying out range measurement to shaggy object.
To achieve the above object, the invention proposes moved using wave-front division as inhibiting to dissipate in a kind of imaging of range of triangle point coke
The device of spot effect, which is characterized in that the device includes transmitting unit and receiving unit, in which:
The transmitting unit includes laser and focus lens group, and the focus lens group is placed in the laser and is tested
Between target, the laser for generating the laser focuses to form a focal spot, is irradiated to the measured target surface and produces
Raw scattering light；
The receiving unit includes two-dimentional glass chip arrays, receiving lens group and photoelectric image detector, the two dimension glass
Glass chip arrays and receiving lens group are placed between the photoelectric image detector and measured target, and what the measured target issued dissipates
It penetrates light and picture is moved by the two-dimentional glass chip arrays wave-front division, form multiple focal spot pictures and connect by the photoelectric image detector
It receives.
As it is further preferred that it is described two dimension glass chip arrays be placed between the receiving lens group and measured target,
Between the receiving lens group and photoelectric image detector or inside of the receiving lens group.
As it is further preferred that the quantity of sheet glass is 6~12 in the two dimension glass chip arrays.
As it is further preferred that the quantity of sheet glass is preferably 9 in the two dimension glass chip arrays.
As it is further preferred that the picture for putting focal spot on the photoelectric image detector is uniformly distributed.
As it is further preferred that in the two dimension glass chip arrays placement angle of i-th of sheet glass should meet with
Lower relationship:
nsinθi'=sin θi (2)
In formula, i is from center to the number of two number of edges sheet glass, θiFor incident ray on i-th of sheet glass and normal it
Between angle, θi' for the angle on i-th sheet glass between refracted light and normal, n is the refractive index of sheet glass, and m is photoelectricity
The number of focal spot picture is put on image detector dimension, A is sensor devices in photoelectric image detector in corresponding dimension
Length, φ are the diameter that focal spot picture is put on photoelectric image detector, and d is the thickness of sheet glass.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, mainly have below
Technological merit:
1. the present invention can will be dissipated by the way that two-dimentional glass chip arrays are arranged between photoelectric image detector and measured target
It penetrates light wave-front division and moves the picture as multiple focal spots of formation, to obtain more measurement data, and pass through averaged and carry out
Range measurement is effectively reduced the uncertainty measured in laser triangulation using average method, and will not sacrifice survey
The lateral resolution of device is measured, there are wider array of application scenarios；
2. if the speckle energy central position uncertainty of single point coke laser triangulation method is δ, by wave-front division
It moves as uncertainty is after forming N number of focal spot pictureN number of sheet glass can generate N number of point in two-dimentional glass chip arrays
Focal spot picture, therefore the quantity by increasing sheet glass can increase wave-front division and move as after the number for forming point focal spot picture, to make
The uncertainty measured in laser triangulation is obtained to further decrease；
3. in addition, angle of the present invention by adjusting sheet glass, so that the point focal spot picture on photoelectric image detector is uniform
Distribution, the weight for guaranteeing that each focal spot provides when determining facula position is almost the same, to reduce the generation of error；
4. especially, the qualifications of each sheet glass placement angle are determined by calculation in the present invention, can be according to application
Condition is effectively adjusted, and is conducive to the device for constructing the present invention and is applied to different scenes.
Detailed description of the invention
Fig. 1 is the device moved using wave-front division in range of triangle point coke imaging provided by the invention as inhibiting speckle effect
Structural schematic diagram；
Fig. 2 is the propagation condition of i-th of sheet glass glazed thread in two-dimentional glass chip arrays in the embodiment of the present invention.
In all the appended drawings, identical appended drawing reference is used to denote the same element or structure, in which:
1: laser, 2: focus lens group, 3: measured target, 4: two-dimentional glass chip arrays, 5: receiving lens group, 6: photoelectricity
Image detector.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
As shown in Figure 1, the present invention provides moved using wave-front division as inhibiting speckle to imitate in a kind of imaging of range of triangle point coke
The device answered, which is characterized in that the device includes transmitting unit and receiving unit, in which:
The transmitting unit includes laser 1 and focus lens group 2, and the focus lens group 2 is placed in 1 He of laser
Between measured target 3, the laser for generating the laser 1, which focuses, to form a focal spot, is irradiated to 3 table of measured target
Face simultaneously generates scattering light；
The receiving unit includes two-dimentional glass chip arrays 4, receiving lens group 5 and photoelectric image detector 6, the two dimension
Glass chip arrays 4 and receiving lens group 5 are placed between the photoelectric image detector 6 and measured target 3, the measured target 3
The scattering light of sending moves picture by two-dimentional 4 wave-front division of glass chip arrays, forms multiple focal spot pictures and by the photoelectric image
Detector 6 receives；
More specifically, the two dimension glass chip arrays 4 are put in both directions by N number of sheet glass and are formed, 3 table of measured target
The corrugated for the scattering light that face issues is divided into N number of part by two-dimentional glass chip arrays 4, move formed as after N number of focal spot as in
On photoelectric image detector 6, if the speckle energy central position uncertainty of single point coke laser triangulation method is δ, warp
Crossing the uncertainty that wave-front division is moved as after isUncertainty is effectively reduced, and piece count is more,
The reducing effect of uncertainty of measurement is better, and the laser intensity of laser transmitting is directly proportional to the point number of focal spot picture.
Further, the two-dimentional glass chip arrays 4 be placed between the receiving lens group 5 and measured target 3, the reception
Between the lens group 5 and photoelectric image detector 6 or inside of the receiving lens group 5.
Further, the quantity of sheet glass is 6~12 in the two-dimentional glass chip arrays 4.
Further, the quantity of sheet glass is preferably 9 in the two-dimentional glass chip arrays 4.
Further, the picture that focal spot is put on the photoelectric image detector 6 is uniformly distributed.
Further, as shown in Fig. 2, in the two dimension glass chip arrays placement angle of i-th of sheet glass should meet with
Lower relationship:
nsinθi'=sin θi (2)
In formula, i is from center to the number of two number of edges sheet glass, θiFor incident ray on i-th of sheet glass and normal it
Between angle, θi' for the angle on i-th sheet glass between refracted light and normal, n is the refractive index of sheet glass, and m is photoelectricity
The number of focal spot is put on image detector dimension, A is length of the sensor devices in corresponding dimension in photoelectric image detector
Degree, φ are the diameter that focal spot is put on photoelectric image detector, and d is the thickness of sheet glass.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (6)
1. moving the device as inhibition speckle effect using wave-front division in the imaging of range of triangle point coke, which is characterized in that the device packet
Include transmitting unit and receiving unit, in which:
The transmitting unit includes laser (1) and focus lens group (2), and the focus lens group (2) is placed in the laser
(1) between measured target (3), for focusing the laser that the laser (1) generates to form a focal spot, it is irradiated to the quilt
It surveys target (3) surface and generates scattering light；
The receiving unit includes two-dimentional glass chip arrays (4), receiving lens group (5) and photoelectric image detector (6), and described two
Dimension glass chip arrays (4) and receiving lens group (5) are placed between the photoelectric image detector (6) and measured target (3), described
The scattering light that measured target (3) issues moves picture by two-dimentional glass chip arrays (4) wave-front division, forms multiple focal spot pictures and quilt
The photoelectric image detector (6) receives.
2. the device as inhibiting speckle effect is moved using wave-front division in range of triangle point coke imaging as described in claim 1,
Be characterized in that, it is described two dimension glass chip arrays (4) be placed between the receiving lens group (5) and measured target (3), the reception
Between lens group (5) and photoelectric image detector (6) or the inside of the receiving lens group (5).
3. the device as inhibiting speckle effect is moved using wave-front division in range of triangle point coke imaging as claimed in claim 1 or 2,
It is characterized in that, the quantity of sheet glass is 6~12 in the two dimension glass chip arrays (4).
4. being moved using wave-front division as inhibiting speckle effect in range of triangle point coke imaging as claimed in any one of claims 1 to 3
Device, which is characterized in that the quantity of sheet glass is preferably 9 in two dimension glass chip arrays (4).
5. as moved using wave-front division as inhibiting speckle effect in the described in any item range of triangle point coke imagings of Claims 1 to 4
Device, which is characterized in that on the photoelectric image detector (6) put focal spot picture be uniformly distributed.
6. being moved using wave-front division as inhibiting speckle effect in range of triangle point coke imaging as claimed in any one of claims 1 to 5
Device, which is characterized in that the placement angle of i-th of sheet glass should meet following relationship in the two dimension glass chip arrays:
nsinθi'=sin θi (2)
In formula, i is from center to the number of two number of edges sheet glass, θiFor the folder on i-th of sheet glass between incident ray and normal
Angle, θi' for the angle on i-th sheet glass between refracted light and normal, n is the refractive index of sheet glass, and m is that photoelectric image is visited
It surveys on device dimension and puts the number of focal spot, A is that length of the sensor devices in corresponding dimension, φ are in photoelectric image detector
The diameter of focal spot is put on photoelectric image detector, d is the thickness of sheet glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811406179.5A CN109387851B (en) | 2018-11-23 | 2018-11-23 | Device for inhibiting speckle effect by using partial wave surface shift image in triangular distance measurement point focus imaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811406179.5A CN109387851B (en) | 2018-11-23 | 2018-11-23 | Device for inhibiting speckle effect by using partial wave surface shift image in triangular distance measurement point focus imaging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109387851A true CN109387851A (en) | 2019-02-26 |
| CN109387851B CN109387851B (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811406179.5A Expired - Fee Related CN109387851B (en) | 2018-11-23 | 2018-11-23 | Device for inhibiting speckle effect by using partial wave surface shift image in triangular distance measurement point focus imaging |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629422A (en) * | 2021-01-07 | 2021-04-09 | 嘉应学院 | Error correction method for improving measurement accuracy of speckle method and speckle measurement method |
| CN116381708A (en) * | 2023-06-07 | 2023-07-04 | 深圳市圳阳精密技术有限公司 | High-precision laser triangular ranging system |
Citations (3)
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| CN206160946U (en) * | 2016-10-17 | 2017-05-10 | 海伯森技术（深圳）有限公司 | Laser triangle displacement sensor |
| CN107037443A (en) * | 2015-11-04 | 2017-08-11 | 赫克斯冈技术中心 | Method and apparatus for the range measurement based on triangulation |
| CN107390202A (en) * | 2017-07-19 | 2017-11-24 | 西安理工大学 | A kind of method using spherical mirror reflection measurement spot drift and beam jitter |
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2018
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Patent Citations (3)
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| CN107037443A (en) * | 2015-11-04 | 2017-08-11 | 赫克斯冈技术中心 | Method and apparatus for the range measurement based on triangulation |
| CN206160946U (en) * | 2016-10-17 | 2017-05-10 | 海伯森技术（深圳）有限公司 | Laser triangle displacement sensor |
| CN107390202A (en) * | 2017-07-19 | 2017-11-24 | 西安理工大学 | A kind of method using spherical mirror reflection measurement spot drift and beam jitter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629422A (en) * | 2021-01-07 | 2021-04-09 | 嘉应学院 | Error correction method for improving measurement accuracy of speckle method and speckle measurement method |
| CN116381708A (en) * | 2023-06-07 | 2023-07-04 | 深圳市圳阳精密技术有限公司 | High-precision laser triangular ranging system |
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| CN109387851B (en) | 2020-11-24 |
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