Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Vortex light mode detection method based on three-step phase shift method

A three-step phase shift method and pattern detection technology, which is applied in optical radiation measurement, measuring devices, photometry, etc., can solve problems such as single method and difficult pattern detection, and achieve simple optical path, high accuracy and wide application range Effect

Inactive Publication Date: 2020-06-19
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical solution of the present invention is as follows: Aiming at the difficulty and singleness of the current vortex light mode detection method, a vortex light mode analysis method based on the three-step phase shift method is proposed. This method has a simple optical path and strong flexibility. Record three different target vortex beam interference patterns and an intensity distribution map at the same position on a specific plane, then the complex amplitude distribution and topological charge of the target vortex beam at this position can be obtained, and the complex amplitude distribution can be obtained by computer The mode degree and mode purity of the target vortex light can be obtained by convolution operation with the standard vortex light base of different topological charges, so as to realize the mode analysis of the target vortex light

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
  • Vortex light mode detection method based on three-step phase shift method
  • Vortex light mode detection method based on three-step phase shift method
  • Vortex light mode detection method based on three-step phase shift method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] specific implementation plan

[0042] The implementation object of the present invention is a spatial light modulator, and the specific implementation steps are as follows:

[0043] (1) Laguerre-Gauss vortex light mode purity analysis scheme

[0044] The complex amplitude modulation hologram of the target vortex beam was prepared, and on the basis of this hologram, three one-dimensional gratings with phase shifts of 0, 0.5π, and π were superimposed to obtain three new holograms. The initial hologram and the three new holograms are sequentially loaded into the spatial light modulator (6), and the stable Gaussian light is generated through the laser generator resonator (1), which passes through the linear polarizer (2) and the neutral density filter in turn. sheet (3), then irradiates the spatial light modulator (6) through the beam collimation system composed of the lens (4) and the lens (5), after complex amplitude modulation, the emitted light is the target vortex lig...

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 relates to a vortex light mode detection method based on a three-step phase shift method. Vortex light is a special light field with a spiral wave front, and the three-step phase shift method is a phase measurement method. The method comprises the steps of firstly, preparing a hologram of target vortex light; superposing three beams of one-dimensional gratings with phase shifts of 0,0.5 pi and pi on the basis to obtain three new holograms; sequentially recording the intensity distribution of the initial vortex light and the interference distribution of the three beams of phase shift vortex light on the same plane through a spatial light modulator method, and obtaining the complex amplitude distribution of the vortex light in combination with a phase formula; and secondly, carrying out convolution operation on the complex amplitude distribution and standard vortex light bases with different topological charges through a computer to acquire the mode degree and the mode purity of the target vortex light and achieve mode analysis of the target vortex light. The method provided by the invention is simple in optical path and high in flexibility, belongs to the field of vortex light detection, and can be applied to mode detection of complex vortex light.

Description

technical field [0001] The invention relates to a vortex light mode detection method based on a three-step phase shift method. The vortex light is a special light field with a helical wave front. The three-step phase shift method is a phase measurement method. Through the three-step phase shift The complex amplitude distribution of the vortex light can be measured by the method, combined with the mode analysis, the mode degree and mode purity of the target vortex light can be obtained. The method has simple optical path and strong flexibility, belongs to the field of vortex light detection, and can be applied to the pattern detection of complex vortex light. [0002] technical background [0003] Vortex light is a light field with helical wavefront and special light intensity distribution, and Laguerre-Gaussian light is a typical vortex light. In recent years, vortex light has attracted much attention due to its wide application value in optical manipulation, optical communi...

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): G01J1/42
CPCG01J1/4257
Inventor 王琛任元刘通丁友邱松赵龙邢朝阳吴昊
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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
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