Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Generation/three g dimensional reconstruction apparatus and method for Laguerre Gaussian vortex beam

A Gaussian beam, vortex beam technology, applied in optics, optical components, instruments, etc., can solve problems such as poor stability and complex structure

Inactive Publication Date: 2017-06-27
SOUTH CHINA NORMAL UNIVERSITY
View PDF4 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, in order to solve the technical problem that the devices and methods for generating Laguerre-Gaussian beams in the prior art have the disadvantages of complex structure and poor stability, the present invention proposes a generation / three-dimensional reconstruction of Laguerre-Gaussian vortex beams The device and method select a digital micromirror device (DMD) to generate a vortex beam. During the experiment, the amplitude or phase of the LG beam can be loaded or the combination of the two can be used to generate the LG beam.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Generation/three g dimensional reconstruction apparatus and method for Laguerre Gaussian vortex beam
  • Generation/three g dimensional reconstruction apparatus and method for Laguerre Gaussian vortex beam
  • Generation/three g dimensional reconstruction apparatus and method for Laguerre Gaussian vortex beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Such as figure 1 As shown, the first embodiment of the present invention provides a device for generating a Laguerre-Gaussian vortex beam, including:

[0071] Laser 10, for sending Gaussian beam; Laser is the He-Ne laser of 633nm;

[0072] The first convex lens (L1) 20 is used to expand the Gaussian beam;

[0073] The second convex lens (L2) 30 is used to collimate the expanded Gaussian beam;

[0074] Computer (PC) 50 is used to produce the fork-shaped diffraction grating, and the fork-shaped diffraction grating is loaded on the digital micromirror device, and the incident light beam of the digital micromirror device is carried out amplitude or / and phase modulation; computer and digital The micromirror device is connected through a USB cable;

[0075] A digital micromirror device (DMD) 40 is used to modulate the amplitude or / and phase of the collimated partially coherent Gaussian beam to generate Laguerre-Gaussian vortex beams of different orders;

[0076] The pinho...

Embodiment 2

[0093] The second embodiment of the present invention provides a figure 1 The implementation flow of the device for generating a Laguerre-Gaussian vortex beam, that is, a method for generating a Laguerre-Gaussian vortex beam, is used to generate the light intensity and phase mode of a Laguerre-Gaussian vortex beam, including the following steps :

[0094] Step S1, using a laser to emit a Gaussian beam; the laser is a 633nm He—Ne laser.

[0095] Step S2, using the first convex lens to expand the Gaussian beam.

[0096]Step S3, using the second convex lens to collimate the expanded Gaussian beam.

[0097] Step S4, after the collimated partially coherent Gaussian beam reaches the digital micromirror device, a fork-shaped diffraction grating is generated by the computer, and the fork-shaped diffraction grating is loaded onto the digital micromirror device, and aligned on the digital micromirror device A straight partially coherent Gaussian beam is modulated in amplitude or / and ...

Embodiment 3

[0112] Such as Figure 7 As shown, the third embodiment of the present invention provides a three-dimensional reconstruction device for a Laguerre-Gaussian vortex beam, including:

[0113] Laser 10, for sending Gaussian beam; Laser is the He-Ne laser of 633nm;

[0114] The first convex lens (L1) 20 is used to expand the Gaussian beam;

[0115] The second convex lens (L2) 30 is used to collimate the expanded Gaussian beam;

[0116] The computer (PC) 50 is used to generate a fork-shaped diffraction grating, and load the fork-shaped diffraction grating onto the digital micromirror device to modulate the amplitude or / and phase of the incident beam;

[0117] A digital micromirror device (DMD) 40 is used to modulate the amplitude or / and phase of the collimated partially coherent Gaussian beam to generate Laguerre-Gaussian vortex beams of different orders; the Laguerre-Gaussian beam is expressed as:

[0118]

[0119] where u is the complex amplitude of the beam, is the radial...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a generation / three-dimensional reconstruction apparatus and method for a Laguerre Gaussian vortex beam. The Laguerre Gaussian vortex beam generation apparatus comprises: a laser for emitting a Gaussian beam; a first convex lens for expanding the Gaussian beam; a second convex lens for collimating the expanded Gaussian beam; a computer for generating a fork-shaped diffraction grating and loading the fork-shaped diffraction grating onto a digital micromirror device, and subjecting the incident beam of the digital micromirror device to amplitude and / or phase modulation; and the digital micromirror device for subjecting a part of the collimated Gaussian beam to amplitude or / and phase modulation to produce Laguerre Gaussian vortex beams with different orders. The generation / three-dimensional reconstruction apparatus has a high damage threshold and a very fast response speed, is simple in structure, good in stability, and low in manufacturing cost, and is widely used in the fields of mechanical processing, biomedical treatment, military field, information transmission, micro-control and the like.

Description

technical field [0001] The invention relates to the technical field of optical measuring instruments, in particular to a Laguerre-Gaussian vortex beam generation / three-dimensional reconstruction device and method. Background technique [0002] In optics, a Laguerre-Gaussian beam is a light field satisfying: [0003] [0004] beam of light, of which Represents the Laguerre polynomial. By changing the values ​​of l and p, the shape of the Laguerre-Gaussian beam can be changed, so as to obtain Laguerre-Gaussian beams of different orders. [0005] Due to the vortex phase term carried in the Laguerre-Gaussian beam (LG beam), the center of the beam has a singularity, thereby forming a hollow symmetric mode in the center of the beam. This cylindrically symmetric mode can be described by the radial and angular factors p and l, and p and l remain constant during propagation. As a representative of vortex beams, Laguerre-Gauss beams have been widely used in many fields, and the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G02B27/42G02B26/02G02B26/06
CPCG02B26/02G02B26/06G02B27/0012G02B27/4233
Inventor 巫嘉凡邓冬梅庞子灏陈钰淇黄福强程朗林佳玲
Owner SOUTH CHINA NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com