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

A method and device for generating non-diffraction grating structured light with adjustable parameters

A non-diffraction, structured light technology, applied in the field of non-diffraction light, can solve the problems of complex structure of the projection device, many optical path components, and the non-diffraction grating type structured light cannot meet the adjustable parameters, etc., and achieves simple system structure and long focal depth. , the effect of small spacing

Inactive Publication Date: 2015-08-19
HUAZHONG UNIV OF SCI & TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The non-diffraction grating structured light generated by the above device cannot meet the requirements of adjustable parameters, and the projection device has a complex structure and many optical path components

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
  • A method and device for generating non-diffraction grating structured light with adjustable parameters
  • A method and device for generating non-diffraction grating structured light with adjustable parameters
  • A method and device for generating non-diffraction grating structured light with adjustable parameters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific examples described here are only used to explain the present invention, not to limit the present invention.

[0039] figure 1 It shows a schematic diagram of the system structure for realizing the non-diffraction grating structured light method according to the present invention, as figure 1 As shown in , it mainly includes laser a and spatial filter collimator b. Laser a is used to provide light beams, and spatial filter collimator b is used to spatially filter and collimate the laser light to obtain better parallel light.

[0040]The system also includes a dichroic prism c and two symmetrically arranged first plane mirrors d1 and second plane mirrors d2, wherein the dichroic prism c is used to split the pa...

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 generating diffraction-free grid type structured light with adjustable parameters. The method comprises: (1), performing space filtering collimation on laser beams emitted by a laser through a space filtering collimator to form parallel light beams; (2), dividing the parallel light beams into two beams of coherent light through a spectroscope; (3), through two planar mirrors which are symmetrically arranged and rotationally adjustable, enabling the two beams of coherent light to be respectively reflected by the corresponding planar mirrors to obtain a first light beam and a second light beam after reflection; and (4), intersecting the two light beams to generate interference, and through rotating the planar mirrors, enabling an intersection included angle formed through the two light beams to change so as to obtain diffraction-free grid type structured light stripes. The invention also discloses an apparatus for realizing a diffraction-free grid type structured light. According to the invention, the method and apparatus can be used for generating the grid type structured light whose stripe width, diffraction-free range and diffraction-free propagation distance can be adjusted, and can be applied to surface three-dimensional morphology measurement of objects with the demands for different measurement precision, different measurement scopes, different resolutions and the like.

Description

technical field [0001] The present invention relates to the field of non-diffraction light technology, in particular to a method and device for realizing non-diffraction grating structured light with adjustable parameters, which can be applied to non-contact three-dimensional shape measurement on the surface of free-form surface parts with large surface curvature spans . Background technique [0002] Non-diffracting beams are a set of special solutions of the wave equation in free space, and their field distribution has the form of the first kind of zero-order Bessel function, and has the property of not diverging when propagating, and has a wide range of applications in many fields. [0003] There are many existing methods and devices for generating non-diffraction light. For example, a device for realizing linear non-diffraction structured light is disclosed in Chinese utility model patent CN200983014Y. The device is symmetrical with the center plane of an isosceles triang...

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 Patents(China)
IPC IPC(8): G02B27/09G02B7/198G01B11/25
Inventor 周莉萍周芳媛徐龙朱亚程亚峰
Owner HUAZHONG UNIV OF SCI & TECH
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