Method for flexibly regulating and controlling self-focusing focal length of self-focusing light beam

A self-focusing and beam technology, applied in optics, optical components, instruments, etc., can solve the problems of inability to flexibly adjust the self-focusing focal length of circular Airy beams, complicated operation, etc., and achieve clear halo distribution, convenient operation and good focusing effect. Effect

Active Publication Date: 2020-02-21
HENAN UNIV OF SCI & TECH
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Changing the incident angle of the beam and calculating the phase hologram of the circular Airy light field corresponding to different focal lengths can both control the self-focusing focal length of the circular Airy beam. Although the two

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
  • Method for flexibly regulating and controlling self-focusing focal length of self-focusing light beam
  • Method for flexibly regulating and controlling self-focusing focal length of self-focusing light beam
  • Method for flexibly regulating and controlling self-focusing focal length of self-focusing light beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0025] The implementation steps of a method for flexibly regulating the self-focusing focal length of the self-focusing beam of the present invention are as follows:

[0026] (1) According to formula 3, the phase hologram is generated by computer holography;

[0027] (2) Obtain circular Airy beam phase holograms with different self-focusing focal lengths by changing the value of the quadratic phase factor coefficient m;

[0028] (3) The phase hologram is loaded on the spatial light modulator, and the spatial light modulator loaded with the phase hologram is irradiated with the beam expanded and collimated laser to generate a circular Airy beam with a specific focal length required.

[0029] see figure 1 , is an embodiment of a phase hologram for generating a circular Airy beam. The wavelength of the lase...

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 method for flexibly regulating and controlling the self-focusing focal length of a self-focusing light beam. According to the method, a phase hologram that has a secondary phase factor and is generated by using a computer holographic technology is loaded to a spatial light modulator; the self-focusing focal length of a round Airy beam is regulated and controlled by changing the coefficient of the secondary phase factor and the round Airy beam with the required self-focusing focal length is generated, so that the halo distribution is clear and the focusing effect is good. The cubic phase hologram is generated by utilizing a computer holographic technology, so that the cost is hardly required; focusing effects of lenses with different focal lengths on the round Airybeam can be reflected; and compared with the mode of generating the round Airy beam by using Fourier space, the disclosed method does not need a Fourier transform lens. Moreover, the regulation and control mode is convenient to operate; the self-focusing focal length can be regulated and controlled more flexibly; and a specific research task can be completed.

Description

technical field [0001] The invention relates to a method for regulating the self-focusing focal length of a self-focusing light beam, and specifically discloses a method for regulating the focal length by applying a secondary phase factor to the phase of the self-focusing light field. Background technique [0002] In 2010, Efrimidis extended the self-accelerating Airy beam in the Cartesian coordinate system to the cylindrical coordinate system, and proposed a self-focusing circular Airy beam [Optics Letters, 2010, 35(23): 4045-4047]. [0003] In 2011, Greenfield proposed a simple method to generate different concave accelerated transmission beams, that is, by designing the phase distribution of the spatial light modulator, one-dimensional accelerated beams with different preset trajectories can be obtained. In 2015, Zhang theoretically studied 1D and 2D circular Airy beams with different initial velocities [Romanian Reports in Physics, 2015,67(3):1099-1107]. [0004] Changi...

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
IPC IPC(8): G02B27/09G03H1/04G03H1/08
CPCG02B27/0944G03H1/0443G03H1/0465G03H1/08
Inventor 李贺贺张海东马云飞唐苗苗王静鸽李新忠
Owner HENAN UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap