CN110596904B - A laser plane generation device based on micro-cylindrical lens array - Google Patents
A laser plane generation device based on micro-cylindrical lens array Download PDFInfo
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- CN110596904B CN110596904B CN201910928002.XA CN201910928002A CN110596904B CN 110596904 B CN110596904 B CN 110596904B CN 201910928002 A CN201910928002 A CN 201910928002A CN 110596904 B CN110596904 B CN 110596904B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims abstract description 6
- 239000004926 polymethyl methacrylate Substances 0.000 claims abstract description 6
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims description 8
- 239000004065 semiconductor Substances 0.000 claims description 5
- 229920001169 thermoplastic Polymers 0.000 claims 1
- 239000004416 thermosoftening plastic Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0916—Adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0955—Lenses
- G02B27/0961—Lens arrays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0955—Lenses
- G02B27/0966—Cylindrical lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0972—Prisms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/1805—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for prisms
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Abstract
本发明公开了一种基于微柱状透镜阵列的激光平面生成装置。该装置包括激光光源模块、旋转棱镜模块、微柱状透镜阵列模块和调节机构；微柱状透镜阵列模块是由很多个微型柱状透镜紧密排列在聚甲基丙烯酸甲酯材料的平板波导衬底上构成的，激光光源模块发出一束准直的激光，旋转棱镜模块将激光的传输方向偏转90°，激光照射到微柱状透镜阵列模块后，透射后的激光光线会沿柱状透镜径向展宽，在空间中形成一个激光扇面；激光扇面的坡度和高低位置可以通过控制步进电机或者旋转棱镜模块灵活更改。本发明不仅凭借简单的装置可以实现激光平面的生成，而且可以方面灵活的控制激光平面的坡度和高度。
The invention discloses a laser plane generating device based on a micro-cylindrical lens array. The device includes a laser light source module, a rotating prism module, a micro-cylindrical lens array module and an adjustment mechanism; the micro-cylindrical lens array module is composed of many micro-cylindrical lenses closely arranged on a planar waveguide substrate made of polymethyl methacrylate material. , the laser light source module emits a collimated laser beam, and the rotating prism module deflects the transmission direction of the laser light by 90°. After the laser is irradiated to the micro-cylindrical lens array module, the transmitted laser light will expand along the radial direction of the cylindrical lens. A laser fan is formed; the slope and height of the laser fan can be flexibly changed by controlling the stepping motor or rotating the prism module. The present invention can not only realize the generation of the laser plane by means of a simple device, but also can flexibly control the slope and height of the laser plane.
Description
Technical Field
The invention relates to a laser plane generating device, in particular to a laser plane generating device based on a micro-cylindrical lens array.
Background
Compared with traditional light sources such as incandescent lamps and light emitting diodes, laser has the advantages of high brightness, high coherence, good directivity and the like, and is widely applied to the fields of optical ranging, optical positioning, optical radars, optical sensing and the like. In many scenes, the distance and the direction of a far target object can be accurately measured by using a laser beam, and compared with a traditional measuring mode, the laser measuring method has the advantages of higher accuracy, more compact structure and lower power consumption. However, the narrow irradiation range of the single laser beam is limited, and the requirements of many scenes cannot be met, for example, when multiple targets need laser calibration at the same time, the single laser beam cannot be realized, and a laser plane is needed. The laser plane has extensive application in aspects such as building engineering and machine-building, for example can generate a horizontally laser plane and assist and accomplish land leveling work, the floating work on level ground and indoor decoration work etc. compare in traditional ink marker and theodolite, not only can save a large amount of manpower and materials with the help of the laser plane, raise the efficiency, but also can reach better effect.
However, the laser plane is generated by deflecting a light beam emitted from a laser by using a rectangular prism or a pentagonal prism, and then driving the prism to rotate rapidly by using a rotating motor, so as to generate a scanned laser plane in a space environment. The generation mode of the laser plane is widely applied to instruments similar to a laser swinger and the like, and although the use requirements of some scenes can be met, the instrument has larger volume, heavier weight and larger energy consumption due to the fact that the instrument comprises a motor.
Disclosure of Invention
In order to overcome the above disadvantages, an object of the present invention is to provide a laser plane generating device based on a micro-cylinder lens array, wherein the micro-cylinder lens array made of PMMA material is used to widen a laser beam along the radial direction of the cylinder lens, a laser sector is formed in the space, the micro-cylinder lens array module is driven to rotate around the laser axis by controlling a stepping motor to change the slope of the laser sector and the rotating prism module is controlled to change the height of the laser sector.
The invention discloses a laser plane generating device based on a micro-cylindrical lens array, which comprises: the laser light source module adopts a semiconductor laser diode, and a collimating lens structure is arranged at an emergent end, so that the divergence angle of emergent laser is reduced; the rotating prism module receives the emergent laser light of the laser light source module and deflects the laser transmission direction by 90 degrees by utilizing mirror reflection; the micro-cylindrical lens array module is formed by closely arranging a plurality of micro-cylindrical lenses on a flat waveguide substrate, laser rays emitted by the rotating prism module are uniformly spread along a certain direction, and laser leaves the micro-cylindrical lens array module to form a laser sector in a free space; the adjusting structure comprises a stepping motor, a thread block, a screw rod and a transmission mechanism, wherein the thread block is connected with the micro-cylindrical lens array module, and the stepping motor drives the thread block on the screw rod through the transmission mechanism to drive the micro-cylindrical lens array module to rotate.
The micro cylindrical lenses on the micro cylindrical lens array module have the same size, the diameter of each cylindrical lens is smaller than the diameter of a light spot of laser emitted by the laser source module, and when laser passes through the micro cylindrical lenses, the length of the broadened light is larger and larger along with the propagation distance, so that a laser sector is formed in a space environment.
One end of the micro-cylindrical lens array module is installed on the thread block, and the stepping motor drives the micro-cylindrical lens array module to rotate around a laser optical axis to form a laser sector with gradient.
The micro-cylindrical lens array module is made of polymethyl methacrylate, the cylindrical lens is formed through thermal molding, and the protruding part is half of the cylindrical lens.
The wavelength of the laser light source module is 635nm or 532 nm.
The rotating prism module is a right-angle prism or a pentagonal prism.
When the rotary prism module moves up and down along the laser optical axis, the height position of the formed laser sector in the space is changed in response.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention has the advantages of simple mechanical structure, small device volume, easy installation and adjustment, flexible and convenient use and the like.
2. The laser plane with different heights and different gradients can be realized by controlling the adjusting structure, so that the laser plane with the adjustable height can be applied to more occasions and is more widely applied.
Drawings
FIG. 1 is a block diagram of the module of the laser plane generating device based on micro-cylindrical lens array according to the present invention;
FIG. 2 is a schematic structural diagram of a laser plane generating device based on a micro-cylindrical lens array according to the present invention;
FIG. 3 is a schematic structural diagram of another laser plane generating device based on micro-cylindrical lens array according to the present invention;
FIG. 4 is a schematic structural diagram of a micro-cylindrical lens array module according to the present invention;
FIG. 5 is an image of a laser spot incident on a micro-lenticular lens array;
fig. 6 is an image of a laser spot emitted from the micro-cylinder lens array.
In the figure: the device comprises a laser light source module 1, a right-angle prism 2, a micro-cylindrical lens array module 3, an adjusting mechanism 4, incident laser rays 5, deflection laser rays 6, a laser sector 7 and a pentagonal prism 8.
Detailed Description
The invention is further elucidated with reference to the drawing.
As shown in fig. 1, the laser plane generating apparatus based on the micro-cylindrical lens array of the present invention includes a laser light source module, a rotating prism module, a micro-cylindrical lens array module, and an adjusting mechanism.
Fig. 2 is a schematic structural diagram of a laser plane generating device based on a micro-cylindrical lens array according to the present invention, including: the laser light source module 1 adopts a semiconductor laser diode, a collimating lens structure is arranged at an emergent end, the divergence angle of emergent laser is reduced, and in order to increase the visibility of a laser plane, a laser light source is selected to be red light with a wavelength of 635nm or green light with a wavelength of 532 nm; the rotating prism module adopts a right-angle prism 2, and deflects the laser light 5 received from the laser light source module by 90 degrees by utilizing mirror reflection to emit the laser light; the right-angle prism can move up and down along the incident laser ray 5 to achieve the purpose of adjusting the height of the laser plane. The micro-cylindrical lens array module 3 uniformly spreads laser rays 6 emitted by the rotating prism module along a certain direction, laser leaves the micro-cylindrical lens array module 3 and forms a laser sector 7 in a free space, and the laser sector 7 is vertical to the axial direction of the micro-cylindrical lens; adjust structure 4, including step motor, thread block, lead screw and drive mechanism, the thread block with little cylindricality lens array module 3 is connected, and step motor drives through the thread block on the drive mechanism drive lead screw, drives then little cylindricality lens array module 3 is rotatory, adjusts the slope of laser sector 7.
Fig. 3 is another schematic structural diagram of a laser plane generating device based on a micro-cylindrical lens array according to the present invention, including: the laser light source module 1 adopts a semiconductor laser diode, a collimating lens structure is arranged at an emergent end, the divergence angle of emergent laser is reduced, and in order to increase the visibility of a laser plane, a laser light source is selected to be red light with a wavelength of 635nm or green light with a wavelength of 532 nm; the rotating prism module adopts a pentagonal prism 8, and deflects the laser light 5 received from the laser light source module by 90 degrees by utilizing mirror reflection to emit the laser light; the pentagonal prism 8 can move up and down along the incident laser ray 5 to achieve the purpose of adjusting the height of the laser plane. The micro-cylindrical lens array module 3 uniformly spreads laser rays 6 emitted by the rotating prism module along a certain direction, laser leaves the micro-cylindrical lens array module 3 and forms a laser sector 7 in a free space, and the laser sector 7 is vertical to the axial direction of the micro-cylindrical lens; adjust structure 4, including step motor, thread block, lead screw and drive mechanism, the thread block with little cylindricality lens array module 3 is connected, and step motor drives through the thread block on the drive mechanism drive lead screw, drives then little cylindricality lens array module 3 is rotatory, adjusts the slope of laser sector 7.
Fig. 4 is a schematic structural diagram of a micro-cylindrical lens array module according to the present invention, the micro-cylindrical lens array module is formed by closely arranging a plurality of micro-cylindrical lenses on a slab waveguide substrate, the micro-cylindrical lens array module may be made of polymethyl methacrylate (PMMA), and the cylindrical lenses are formed by thermal molding.
Application examples
Fig. 5 is a laser spot image of the incident micro-cylindrical lens array, the laser spot of the incident micro-cylindrical lens array is simulated through ZEMAX optical simulation software, the wavelength of the laser light source is set to be 635nm, the diameter of the laser spot is 7mm, the laser spot does not change before the laser is not incident on the micro-cylindrical lens array module, the circularly symmetric shape is maintained, and fig. 5 is the simulated laser spot image of the incident micro-cylindrical lens array.
Fig. 6 is an image of a laser spot emitted from the micro-cylinder lens array. Simulating laser spots incident on the micro cylindrical lens array by ZEMAX optical simulation software, wherein the wavelength of a laser source is set to be 635nm, the diameter of the laser spots is 7mm, the height of each convex part of each micro cylindrical lens in the micro cylindrical lens array module is set to be 0.05mm, the width of each convex part of each micro cylindrical lens is set to be 0.32mm, and a laser spot image is obtained by simulation when laser is emitted from the micro cylindrical lens array and transmitted for 1000mm, as shown in FIG. 6; from the results in the figure, it can be seen that the originally circularly symmetric laser spot becomes a slender laser line, the length of the laser line is about 800mm, and the width is equal to the diameter of the incident laser spot, which is 7 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910928002.XA CN110596904B (en) | 2019-09-27 | 2019-09-27 | A laser plane generation device based on micro-cylindrical lens array |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910928002.XA CN110596904B (en) | 2019-09-27 | 2019-09-27 | A laser plane generation device based on micro-cylindrical lens array |
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| CN110596904A CN110596904A (en) | 2019-12-20 |
| CN110596904B true CN110596904B (en) | 2021-05-18 |
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| CN107044847A (en) * | 2015-11-04 | 2017-08-15 | 赫克斯冈技术中心 | Laser module including microlens array |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2320985Y (en) * | 1998-03-04 | 1999-05-26 | 吴小勇 | Digital display laser slope measuring instrument |
| CN109343226A (en) * | 2018-11-22 | 2019-02-15 | 常州英诺激光科技有限公司 | A kind of optical system that laser facula is converted to uniform alignment hot spot |
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2019
- 2019-09-27 CN CN201910928002.XA patent/CN110596904B/en active Active
Patent Citations (5)
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|---|---|---|---|---|
| US5095386A (en) * | 1990-05-01 | 1992-03-10 | Charles Lescrenier | Optical system for generating lines of light using crossed cylindrical lenses |
| CN1294551A (en) * | 1997-04-23 | 2001-05-09 | 蓝天研究所 | Process for mfg. cylindrical microlenses |
| CN1646848A (en) * | 2002-04-19 | 2005-07-27 | 诺斯克埃莱克特罗奥普体克公司 | Pipeline internal inspection device and method |
| CN1629601A (en) * | 2003-12-15 | 2005-06-22 | 上海浩顺科技有限公司 | Laser test control device and method for pavement construction flatness |
| CN107044847A (en) * | 2015-11-04 | 2017-08-15 | 赫克斯冈技术中心 | Laser module including microlens array |
Non-Patent Citations (1)
| Title |
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| 轨道车辆车底多曲面检测与补偿系统;王子洲;《中国优秀硕士学位论文全文数据库工程科技II辑》;20190615(第6期);正文第5-6页 * |
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