CN109323669A - A kind of laser stripe grenade instrumentation - Google Patents
A kind of laser stripe grenade instrumentation Download PDFInfo
- Publication number
- CN109323669A CN109323669A CN201811400382.1A CN201811400382A CN109323669A CN 109323669 A CN109323669 A CN 109323669A CN 201811400382 A CN201811400382 A CN 201811400382A CN 109323669 A CN109323669 A CN 109323669A
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- laser
- diode
- laser diode
- grenade instrumentation
- stripe
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- 239000011159 matrix material Substances 0.000 claims description 31
- 238000012360 testing method Methods 0.000 claims description 10
- 238000002310 reflectometry Methods 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 4
- 241000931526 Acer campestre Species 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000012876 topography Methods 0.000 abstract 1
- 238000005457 optimization Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000010363 phase shift Effects 0.000 description 6
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000000214 mouth Anatomy 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000001314 profilometry Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
- G01B11/254—Projection of a pattern, viewing through a pattern, e.g. moiré
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- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention relates to laser projection field, specially a kind of laser stripe grenade instrumentation.The laser stripe grenade instrumentation of the miniaturization can produce the projection of four-step phase-shifting laser interferencefringes, and be applied to object three-dimensional profile measuring in microcavity.The device is collimated after hot spot expands respectively using four laser diodes and generates interference fringe by mirror-reflection before and after double mirror again, and four laser diodes respectively correspond the laser interference pattern of four outs of phase.Using four-stepped switching policy principle topography measurement can be carried out to three-dimension object.The device is free of movable part, good mechanical stability.
Description
Technical field
The present invention relates to laser projection field, specially a kind of laser stripe grenade instrumentation.
Background technique
Laser three-D is reconstituted in more and more important in modern science and technology and real life.By three-dimensional reconstruction can rapidly by
Spatial information data has important in fields such as 3D map, 3D printing, virtual reality, visualization medical treatment and motion analysis
Using.Three-dimensional reconstruction refers to it by measuring the depth of field data image of three-dimension object come the three-dimensional of restoration and reconstruction three-dimension object
Spatial geometric shape.The mode of general three-dimensional reconstruction is to obtain space encoding by structure light, is obtained by geometrical relationship
Depth information.Wherein laser stripe method has in the application due to the advantages such as simple, high-resolution, dynamic measurement with structure
Greater advantage.The measurement method utilized be referred to as phase measuring profilometer (Phase measuring profilometry,
PMP)。
The fringe projection and algorithm for focusing on realizing wide-angle of three-dimensional reconstruction are realized using phase measuring profilometer
Operation.Phase measuring profilometer needs project to the sinusoidal grating pattern with out of phase on body surface.Conventional method
Using two beam laser, sinusoidal grating figure is generated using principle of interference, the mobile of phase is realized using piezo-electric crystal.Laser interference produces
Raw speckle noise will affect the light distribution of raster image.In addition, due to the non-linear attributes of piezo-electric crystal, phase shift is easy
Generate error.There are also phase shift realized by stepper motor displacement platform, the precision of system also inevitably by
The influence of mechanical shock.
The former often will be more complex laser focusing the operation such as expand, often make front projection device volume become larger,
And projection angle is often also not more than 45 degree.This can be competent at completely under long reach, such as human motion tracking,
Operating distance is in rice magnitude, and article size is also in rice magnitude.But (such as oral cavity) but has many be stranded in extremely narrow space
Difficulty, permitted operating distance only has centimetres under medical condition.
It also can control the projection of stripe using projector.But limited by projector, this projective techniques are all
Micromation difficult to realize, is also unable to satisfy the requirement of three-dimensional reconstruction under medical condition.In short distance (such as thrown in oral cavity
Shadow), these methods are not all right.
A kind of computer programming of patent CN102261896A publicity generates high-precision numerical value phase-shifted grating image and utilizes
The method of phase fringes method measurement object dimensional pattern.The device utilized is: DLP projector, required phase-shifted grating image
It need to be generated by computer programming and pass through DLP projector and project object under test surface.It is limited by its structure and principle, gained
The projecting space angle arrived is little, can not realize under proximity condition.And DLP projector itself is at high cost, and volume is big, no
It is suitable for handheld device.
Summary of the invention
Present invention solves the technical problem that being to overcome the deficiencies of existing technologies, a kind of laser stripe grenade instrumentation is provided.
The features such as device has structure simple, no-movable part, small in size, can be used for the laser three-D of object in narrow volumetric spaces
Projection modeling.
To achieve the above object, the invention provides the following technical scheme:
A kind of laser stripe projection arrangement, including diode laser matrix, collimation lens, reflecting mirror, micro-camera and
Object under test, the collimation lens are fixedly mounted on the side of diode laser matrix, and the reflecting mirror is arranged in collimation lens
Side far from diode laser matrix, the diode laser matrix, collimation lens and reflecting mirror are respectively positioned on same level position
It sets, the position being located above the two between collimation lens and reflecting mirror, the object under test setting is arranged in the micro-camera
The side opposite with micro-camera between collimation lens and reflecting mirror.
Preferably, the diode laser matrix includes laser diode one, laser diode two, three and of laser diode
Laser diode four, and laser diode one, laser diode two, laser diode three and laser diode four from top to bottom according to
Sublinear arrangement.
Preferably, the laser diode one, laser diode two, laser diode three and laser diode four its
Laser head diameter is 6mm.
Preferably, the focal length of the collimation lens is 7.5cm.
Preferably, the reflecting mirror includes front end face and rear end face, and wherein both front end face and rear end face are integrally formed.
Preferably, the reflectivity of the front end face of the reflecting mirror is 38%, and the reflectivity of the rear end face of the reflecting mirror is
100%.
Preferably, the dispersion angle of the diode laser matrix is greater than 60 degree, and its optical maser wavelength is 650nm.
Preferably, the response wave band of the micro-camera and the wave band of diode laser matrix are consistent.
Preferably, the diode laser matrix and micro-camera pass through conducting wire and clock controller is electrically connected, institute
It states diode laser matrix, micro-camera and clock controller and passes through conducting wire and the electric connection of external or built-in power.
Preferably, the laser diode one, laser diode two, laser diode three and laser diode four pass through
Conducting wire is electrically connected with clock controller and internal or external power supply respectively.
Compared with prior art, the beneficial effects of the present invention are: the laser stripe grenade instrumentation of the miniaturization, can produce four
The projection of phase shift laser interferencefringes is walked, and is applied to object three-dimensional profile measuring in microcavity.The present invention utilizes four two poles of laser
Pipe collimates after hot spot expands respectively generates interference fringe, four laser diodes by mirror-reflection before and after double mirror again
Respectively correspond the laser interference pattern of four outs of phase.Using four-stepped switching policy principle pattern survey can be carried out to three-dimension object
Amount.The device is free of movable part, good mechanical stability.
Detailed description of the invention
Fig. 1 is projection theory flow diagram of the invention；
Fig. 2 is system block diagram of the invention.
In figure: 1 diode laser matrix, 1-1 laser diode one, 1-2 laser diode two, 1-3 laser diode three,
1-4 laser diode four, 2 collimation lenses, 3 reflecting mirrors, 3-1 front end face, 3-2 rear end face, 4 micro-cameras, 5 objects under test.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution referring to FIG. 1-2:
A kind of laser stripe projection arrangement, including diode laser matrix 1, collimation lens 2, reflecting mirror 3, micro-camera 4
And object under test 5, the collimation lens 2 are fixedly mounted on the side of diode laser matrix 1, the setting of reflecting mirror 3 exists
Side of the collimation lens 2 far from diode laser matrix 1, the diode laser matrix 1, collimation lens 2 and the equal position of reflecting mirror 3
In the same horizontal position, the position being located above the two between collimation lens 2 and reflecting mirror 3, institute is arranged in the micro-camera 4
It states object under test 5 and side opposite with micro-camera 4 between collimation lens 2 and reflecting mirror 3 is set.
As a kind of technical optimization scheme of the invention, the diode laser matrix 1 include one 1-1 of laser diode,
Four 1-4 of two 1-2 of laser diode, three 1-3 of laser diode and laser diode, and one 1-1 of laser diode, laser diode
Two 1-2, three 1-3 of laser diode and four 1-4 of laser diode successively linear array from top to bottom.
As a kind of technical optimization scheme of the invention, one 1-1 of laser diode, two 1-2 of laser diode, laser
Three 1-3 of diode and four 1-4 of laser diode its laser head diameter are 6mm.
As a kind of technical optimization scheme of the invention, the focal length of the collimation lens 2 is 7.5cm.
As a kind of technical optimization scheme of the invention, the reflecting mirror 3 includes front end face 3-1 and rear end face 3-2, wherein
Both front end face 3-1 and rear end face 3-2 are integrally formed.
As a kind of technical optimization scheme of the invention, the reflectivity of the front end face 3-1 of the reflecting mirror 3 is 38%, institute
The reflectivity for stating the rear end face 3-2 of reflecting mirror 3 is 100%.
As a kind of technical optimization scheme of the invention, the dispersion angle of the diode laser matrix 1 is greater than 60 degree, and
Its optical maser wavelength is 650nm.
As a kind of technical optimization scheme of the invention, the response wave band and diode laser matrix 1 of the micro-camera 4
Wave band it is consistent.
As a kind of technical optimization scheme of the invention, the diode laser matrix 1 passes through conducting wire with micro-camera 4
With clock controller be electrically connected, the diode laser matrix 1, micro-camera 4 and clock controller pass through conducting wire with
External or built-in power is electrically connected.
As a kind of technical optimization scheme of the invention, one 1-1 of laser diode, two 1-2 of laser diode, laser
It is electrical with clock controller and internal or external power supply respectively that three 1-3 of diode and four 1-4 of laser diode passes through conducting wire
Connection.
The invention firstly uses big angle of divergence diode laser matrix 1, dispersion angle is greater than 60 degree, then passes through short focus
Collimation lens 2 carry out laser alignment, form big beam laser beam, then by 3 front and back mirror-reflection of double mirror generate
Interference fringe, and project to 5 surface of object under test.Required four-step phase-shifting is the laser diode battle array formed side by side by four
Column 1 obtain.
The device is made of diode laser matrix 1, collimation lens 2 and double mirror 3, in which: laser diode battle array
Column 1 have the feature of the big angle of divergence, and the front end face 3-1 of double mirror 3 is that part reflective rear end face 3-2 is total reflection.
1 operation wavelength of diode laser matrix is generally visible light, and the CCD response with micro-camera 4 matches.Generally may be used
To use 520nm green light or 650nm feux rouges single mode laser diode.Four required laser diode parameters are consistent, laser
Head diameter is 6mm, and close formation one side by side arranges.It is controlled respectively by driving circuit, only one laser two in the same time
Pole pipe is lighted.During four step striped phase-shift measurements, cooperate with camera, successively light laser diode, so that shooting is not
With the laser stripe under phase-shift phase.
The focal length of collimation lens 2 is 7.5cm.The effect of collimation lens 2 is to carry out the laser diode of angle spread
Collimation.
The characteristics of double mirror 3 is: the front end face 3-1 of double mirror 3 is part reflection (reflectivity is about 38%),
Rear end face 3-2 is total reflection (reflectivity is about 100%).Laser beam after collimation is reflected respectively by front/rear end,
Overlapping generates interference fringe in space.
The pattern that the micro-camera 4 is projected by the laser interferencefringes shot under different phase-shift phases, by computer
Calibration and algorithm by space, are finally inversed by the depth information of object dimensional surface profile.
During people use the device, the divergencing laser of laser diode 1 (by taking 1-2 as an example) outgoing first passes through
Collimation lens 2 collimates.And the relative position of diode laser matrix 1 and collimation lens 2 be it is fixed, with guarantee projection
Laser facula is constant.After collimation lens, laser beam is substantially parallel output.Laser beam after collimation passes through double-sided reflecting
The front end face 3-1 primary event of mirror 3, part are reflected, fractional transmission and by the secondary reflection again of end face 3-2 thereafter, transmit front end face
The part of 3-1 is spatially Chong Die with the laser of the first second part reflective portion, to generate space interference striped.Here
Interference fringe be the total space, therefore under different distance, the image of striped be also it is steady and audible, do not limited by the depth of field.
The period (spatial resolution for influencing three-dimensional measurement) of interference fringe can be by between diode laser matrix 1 and collimation lens 2
Away from fine tuning be adjusted.
Interference fringe is directly projected to 5 surface of object under test, forms the candy strip of deformation, and has the progress of micro-camera 4
Shooting.Synchronous by clock on hardware, when so that a laser diode being opened, micro-camera 4 is exactly in exposure response.Electricity
Four diodes are opened in turn in road control laser array 1, and shoot fourth officer fringe projection picture.It is anti-by computerized algorithm
Drill the three-dimensional appearance profile that object can be obtained, that is, the principle of four-stepped switching policy.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of laser stripe projection arrangement, including it is multiple diode laser matrixs (1), collimation lens (2), reflecting mirror (3), micro-
Type camera (4) and object under test (5), it is characterised in that: the collimation lens (2) is fixedly mounted on diode laser matrix
(1) side, reflecting mirror (3) setting is in the side of collimation lens (2) far from diode laser matrix (1), the laser
Diode array (1), collimation lens (2) and reflecting mirror (3) are respectively positioned on the same horizontal position, and micro-camera (4) setting exists
It is located at the position above the two between collimation lens (2) and reflecting mirror (3), the object under test (5) is arranged in collimation lens (2)
The side opposite with micro-camera (4) between reflecting mirror (3).
2. a kind of laser stripe grenade instrumentation according to claim 1, it is characterised in that: the diode laser matrix
It (1) include laser diode one (1-1), four (1- of laser diode two (1-2), laser diode three (1-3) and laser diode
, and laser diode one (1-1), laser diode two (1-2), laser diode three (1-3) and laser diode four (1-4) 4)
Successively linear array from top to bottom.
3. a kind of laser stripe grenade instrumentation according to claim 2, it is characterised in that: the one (1- of laser diode
1), laser diode two (1-2), laser diode three (1-3) and laser diode four (1-4) its laser head diameter are
6mm。
4. a kind of laser stripe grenade instrumentation according to claim 1, it is characterised in that: the coke of the collimation lens (2)
Away from for 7.5cm.
5. a kind of laser stripe grenade instrumentation according to claim 1, it is characterised in that: before the reflecting mirror (3) includes
End face (3-1) and rear end face (3-2), wherein both front end face (3-1) and rear end face (3-2) are integrally formed.
6. a kind of laser stripe grenade instrumentation according to claim 5, it is characterised in that: the front end of the reflecting mirror (3)
The reflectivity in face (3-1) is 38%, and the reflectivity of the rear end face (3-2) of the reflecting mirror (3) is 100%.
7. a kind of laser stripe grenade instrumentation according to claim 1, it is characterised in that: the diode laser matrix
(1) dispersion angle is greater than 60 degree, and its optical maser wavelength is 650nm.
8. a kind of laser stripe grenade instrumentation according to claim 1, it is characterised in that: the sound of the micro-camera (4)
Answer wave band consistent with the wave band of diode laser matrix (1).
9. a kind of laser stripe grenade instrumentation according to claim 1, it is characterised in that: the diode laser matrix
(1) it is electrically connected by conducting wire and clock controller with micro-camera (4), the diode laser matrix (1), micro-camera
(4) and clock controller passes through conducting wire and external or built-in power is electrically connected.
10. a kind of laser stripe grenade instrumentation according to claim 9, it is characterised in that: the one (1- of laser diode
1), laser diode two (1-2), laser diode three (1-3) and laser diode four (1-4) by conducting wire respectively with clock
Controller and internal or external power supply are electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811400382.1A CN109323669A (en) | 2018-11-22 | 2018-11-22 | A kind of laser stripe grenade instrumentation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811400382.1A CN109323669A (en) | 2018-11-22 | 2018-11-22 | A kind of laser stripe grenade instrumentation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109323669A true CN109323669A (en) | 2019-02-12 |
Family
ID=65258812
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811400382.1A Pending CN109323669A (en) | 2018-11-22 | 2018-11-22 | A kind of laser stripe grenade instrumentation |
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| Country | Link |
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| CN (1) | CN109323669A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174079A (en) * | 2019-06-04 | 2019-08-27 | 重庆大学 | A kind of three-dimensional rebuilding method based on the code-shaped area-structure light of four-step phase-shifting |
| CN111421815A (en) * | 2020-02-18 | 2020-07-17 | 天津大学 | D L P3D bioprinter |
| CN112485899A (en) * | 2020-12-04 | 2021-03-12 | 上海交通大学医学院附属第九人民医院 | Method for setting compact structured light path |
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| JPH07280535A (en) * | 1994-04-04 | 1995-10-27 | Seiko Epson Corp | Three-dimensional shape measuring apparatus |
| US20040125381A1 (en) * | 2002-12-26 | 2004-07-01 | Liang-Chia Chen | Miniature three-dimensional contour scanner |
| CN103115586A (en) * | 2013-02-05 | 2013-05-22 | 华南理工大学 | Micro three-dimensional sensing device based on laser interference fringes |
| CN103575235A (en) * | 2013-11-08 | 2014-02-12 | 湖北汽车工业学院 | Miniature three-dimensional measurement system based on digital fringe projection |
| CN106996753A (en) * | 2017-03-28 | 2017-08-01 | 哈尔滨工业大学深圳研究生院 | Small three dimensional shape measurement system and method based on the micro- fringe projections of LED |
| CN209279915U (en) * | 2018-11-22 | 2019-08-20 | 上海交通大学医学院附属第九人民医院 | A kind of laser stripe grenade instrumentation |
-
2018
- 2018-11-22 CN CN201811400382.1A patent/CN109323669A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07280535A (en) * | 1994-04-04 | 1995-10-27 | Seiko Epson Corp | Three-dimensional shape measuring apparatus |
| US20040125381A1 (en) * | 2002-12-26 | 2004-07-01 | Liang-Chia Chen | Miniature three-dimensional contour scanner |
| CN103115586A (en) * | 2013-02-05 | 2013-05-22 | 华南理工大学 | Micro three-dimensional sensing device based on laser interference fringes |
| CN103575235A (en) * | 2013-11-08 | 2014-02-12 | 湖北汽车工业学院 | Miniature three-dimensional measurement system based on digital fringe projection |
| CN106996753A (en) * | 2017-03-28 | 2017-08-01 | 哈尔滨工业大学深圳研究生院 | Small three dimensional shape measurement system and method based on the micro- fringe projections of LED |
| CN209279915U (en) * | 2018-11-22 | 2019-08-20 | 上海交通大学医学院附属第九人民医院 | A kind of laser stripe grenade instrumentation |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174079A (en) * | 2019-06-04 | 2019-08-27 | 重庆大学 | A kind of three-dimensional rebuilding method based on the code-shaped area-structure light of four-step phase-shifting |
| CN111421815A (en) * | 2020-02-18 | 2020-07-17 | 天津大学 | D L P3D bioprinter |
| CN112485899A (en) * | 2020-12-04 | 2021-03-12 | 上海交通大学医学院附属第九人民医院 | Method for setting compact structured light path |
| CN112485899B (en) * | 2020-12-04 | 2023-03-28 | 上海交通大学医学院附属第九人民医院 | Method for setting compact structured light path |
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