WO2020107517A1 - 一种可实现多线斑结构光功能的光学系统 - Google Patents

一种可实现多线斑结构光功能的光学系统 Download PDF

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Publication number
WO2020107517A1
WO2020107517A1 PCT/CN2018/119815 CN2018119815W WO2020107517A1 WO 2020107517 A1 WO2020107517 A1 WO 2020107517A1 CN 2018119815 W CN2018119815 W CN 2018119815W WO 2020107517 A1 WO2020107517 A1 WO 2020107517A1
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Prior art keywords
light
spot
optical system
system capable
line spot
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PCT/CN2018/119815
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English (en)
French (fr)
Inventor
于光龙
任策
倪强
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福州高意光学有限公司
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Publication of WO2020107517A1 publication Critical patent/WO2020107517A1/zh

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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
    • 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
    • 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
    • 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
    • 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
    • G02B27/0977—Reflective elements
    • 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
    • G02B27/10—Beam splitting or combining systems
    • 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
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • 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
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/4205—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive optical element [DOE] contributing to image formation, e.g. whereby modulation transfer function MTF or optical aberrations are relevant

Definitions

  • the invention relates to the field of industrial surveying and mapping, in particular to an optical system capable of realizing the multi-spot structure light function.
  • Multi-beam spot light is widely used in the field of industrial surveying and mapping. It can achieve non-contact, real-time and high-precision contour mapping on the surface of the workpiece.
  • One of the main devices is the laser module that generates this multi-line spot.
  • the main solution of the module is to use a laser diode to collimate and generate multiple beams of structured light through a Powell prism and a diffractive device DOE. Due to the high cost of glass DOE devices, strict requirements on the angle of incident light, large energy losses and undesirable diffraction secondary.
  • the purpose of the present invention is to provide an optical system with small energy loss, high flexibility and expandability that can realize the multi-spot structure light function.
  • the present invention adopts the following technical solutions:
  • An optical system capable of realizing a multi-line spot structure light function which sequentially includes a laser light source, a collimating lens, a Powell prism, and a beam splitting assembly along a light propagation path, and the beam splitting assembly is closely adhered in sequence by at least two
  • the connected dichroic prism is formed and has at least two reflecting surfaces, and each reflecting surface is formed by adhering two adjacent dichroic prisms to each other, and each reflecting surface is respectively coated with a dichroic film;
  • the laser light emitted by the laser light source passes through a collimating lens After collimation, it passes through Powell prism to form a uniform line spot, and then enters the spectroscopic assembly and then passes through each reflective surface in turn, and multiple beam spot lights are emitted from the spectroscopic assembly, and the beam number of the line spot light and the reflection surface are The number is the same.
  • Two adjacent dichroic prisms are connected together by light glue or glue.
  • the collimating lens may be a spherical lens, an aspheric lens, multiple spherical lenses, or multiple cylindrical lenses.
  • the present invention adopts the above technical solutions. Compared with the existing glass or plastic DOE device solutions, it has the advantages of low energy loss, high flexibility, and scalability, and has a broad commercial prospect.
  • FIG. 1 is a schematic diagram of the present invention.
  • an optical system of the present invention that can realize a multi-spot structure light function includes a laser light source 1, a collimating lens 2, a Powell prism 3, and a beam splitting assembly 4 in sequence along the light propagation path.
  • the beam splitting assembly 4 is composed of at least two beam-splitting prisms that are closely connected in sequence and has at least two reflection surfaces, each of which is formed by two adjacent beam-splitting prisms being bonded to each other, and each reflection surface is plated with a beam splitter
  • the laser light emitted by the laser light source 1 is collimated by the collimating lens 2 and then passes through the Powell prism 3 to form a uniform line spot, and then enters the spectroscopic assembly 4 and then passes through each reflection surface in turn, from the spectroscopic assembly 4
  • Multiple line spot lights are emitted, and the number of line spot lights is the same as the number of reflecting surfaces.
  • Two adjacent dichroic prisms are connected together by light glue or glue.
  • the collimating lens 2 is a spherical lens, aspherical lens, multiple spherical lenses or multiple cylindrical lenses.
  • the present invention adopts the above technical solutions. Compared with the existing glass or plastic DOE device solutions, it has the advantages of low energy loss, high flexibility, and scalability, and has a broad commercial prospect.

Abstract

一种可实现多线斑结构光功能的光学系统，其沿光的传播路径依序包括激光光源(1)、准直透镜(2)、Powell棱镜(3)和分光组合件(4)，分光组合件(4)由至少两个依次紧密贴合连接的分光棱镜构成并且具有至少两个反射面，各反射面分别由相邻两个分光棱镜相互贴合形成，各反射面上分别镀有分光膜；激光光源(1)发出的激光通过准直透镜(2)准直后，再经过Powell棱镜(3)形成均匀的线斑，然后进入分光组合件(4)中再依次经过各反射面后，从分光组合件(4)射出多束线斑光，且线斑光的束数与反射面的个数相同。与现有的玻璃或者塑料DOE器件方案相比，具有能量损耗小，灵活性高，可扩展等优点。

Description

一种可实现多线斑结构光功能的光学系统 技术领域
本发明涉及工业测绘领域，尤其涉及一种可实现多线斑结构光功能的光学系统。
背景技术
多束线斑光广泛应用于工业测绘领域，可以实现非接触、实时而且高精度对工件表面进行轮廓测绘，其中主要的器件之一就是产生这种多线斑的激光模组，目前这种激光模组的主要解决方案是采用激光二级管准直后，经过Powell棱镜及衍射器件DOE来产生多束结构光。由于玻璃DOE器件成本较高、对入射光的角度要求严格，能量损耗大并且会产生不需要的衍射次级。
发明内容
本发明的目的在于提供一种能量损耗小，灵活性高，可扩展的可实现多线斑结构光功能的光学系统。
为实现上述目的，本发明采用以下技术方案：
一种可实现多线斑结构光功能的光学系统，其沿光的传播路径依序包括激光光源、准直透镜、Powell棱镜和分光组合件，所述分光组合件由至少两个依次紧密贴合连接的分光棱镜构成并且具有至少两个反射面，各反射面分别由相邻两个分光棱镜相互贴合形成，各反射面上分别镀有分光膜；所述激光光源发出的激光通过准直透镜准直后，再经过Powell棱镜形成均匀的线斑，然后进入分光组合件中再依次经过各反射面后，从分光组合件射出多束线斑光，且线斑光的束数与反射面的个数相同。
相邻两个分光棱镜通过光胶或者胶合方式贴合连接在一起。
所述准直透镜可以为球面透镜、非球面透镜、多片球面透镜或者多片柱面透镜。
通过改变各反射面的分光比，以实现不同线斑光之间具有特定的能量差异。
通过改变各反射面的角度，可实现不同线斑光间带夹角输出。
本发明采用以上技术方案，与现有的玻璃或者塑料DOE器件方案相比，具有能量损耗小，灵活性高，可扩展等优点，商用前景广阔。
附图说明
以下结合附图和具体实施方式对本发明做进一步详细说明：
图1为本发明的示意图。
具体实施方式
如图1所示，本发明一种可实现多线斑结构光功能的光学系统，其沿光的传播路径依序包括激光光源1、准直透镜2、Powell棱镜3和分光组合件4，所述分光组合件4由至少两个依次紧密贴合连接的分光棱镜构成并且具有至少两个反射面，各反射面分别由相邻两个分光棱镜相互贴合形成，各反射面上分别镀有分光膜；所述激光光源1发出的激光通过准直透镜2准直后，再经过Powell棱镜3形成均匀的线斑，然后进入分光组合件4中再依次经过各反射面后，从分光组合件4射出多束线斑光，且线斑光的束数与反射面的个数相同。
相邻两个分光棱镜通过光胶或者胶合方式贴合连接在一起。
所述准直透镜2为球面透镜、非球面透镜、多片球面透镜或者多片柱面透镜。
通过改变各反射面的分光比，以实现不同线斑光之间具有特定的能量差异。
通过改变各反射面的角度，可实现不同线斑光间带夹角输出。
本发明采用以上技术方案，与现有的玻璃或者塑料DOE器件方案相比，具有能量损耗小，灵活性高，可扩展等优点，商用前景广阔。
尽管结合优选实施方案具体展示和介绍了本发明，但所属领域的技术人员应该明白，在不脱离所附权利要求所限定的本发明的精神和范围内，在形式上和细节上对本发明所做出的各种变化，均为本发明的保护范围。

Claims (5)

  1. 一种可实现多线斑结构光功能的光学系统，其特征在于：其沿光的传播路径依序包括激光光源、准直透镜、Powell棱镜和分光组合件，所述分光组合件由至少两个依次紧密贴合连接的分光棱镜构成并且具有至少两个反射面，各反射面分别由相邻两个分光棱镜相互贴合形成，各反射面上分别镀有分光膜；所述激光光源发出的激光通过准直透镜准直后，再经过Powell棱镜形成均匀的线斑，然后进入分光组合件中再依次经过各反射面后，从分光组合件射出多束线斑光，且线斑光的束数与反射面的个数相同。
  2. 根据权利要求1所述的一种可实现多线斑结构光功能的光学系统，其特征在于：相邻两个分光棱镜通过光胶或者胶合方式贴合连接在一起。
  3. 根据权利要求1所述的一种可实现多线斑结构光功能的光学系统，其特征在于：所述准直透镜为球面透镜、非球面透镜、多片球面透镜或者多片柱面透镜。
  4. 根据权利要求1所述的一种可实现多线斑结构光功能的光学系统，其特征在于：通过改变各反射面的分光比，以实现不同线斑光之间具有特定的能量差异。
  5. 根据权利要求1所述的一种可实现多线斑结构光功能的光学系统，其特征在于：通过改变各反射面的角度，可实现不同线斑光间带夹角输出。
PCT/CN2018/119815 2018-11-30 2018-12-07 一种可实现多线斑结构光功能的光学系统 WO2020107517A1 (zh)

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