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

Laser beam shaping method and device

A laser beam and spot technology, applied in laser welding equipment, optics, optical components, etc., can solve the problems of changing the shape of the spot and the size and distribution of power density, and achieve the effects of low production cost, easy manufacture, and simple structure

Inactive Publication Date: 2012-10-31
KUNSHAN THETA MICRO
View PDF7 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, traditional laser beam shaping optics cannot meet the applications that require real-time changes in spot shape and / or power distribution. Density and distribution to process, and for example, for synthetic materials with different materials and thickness materials superimposed, it is necessary to select different spot shapes and / or power density and distribution according to different materials for processing
[0004] Traditionally, the above situation has been improved by adding multiple diffractive optical device groups to mechanically switch methods, but it is still impossible to change the shape of the spot and the size and distribution of the power density in real time according to, for example, changes in the movement direction of the processing object and material properties

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
  • Laser beam shaping method and device
  • Laser beam shaping method and device
  • Laser beam shaping method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] like figure 1As shown, the laser beam shaping device according to an embodiment of the present invention includes a reflective optical device 2 , a focusing optical device 3 and a driving mechanism 4 . More specifically, the reflective optical device 2 includes a first reflector 21 and a second reflector 22, and the drive mechanism 4 includes a first drive mechanism 41 and a second drive mechanism 42, and the first drive mechanism 41 is used to drive the first reflector 21 , for example to drive the first reflector 21 to rotate, and the second drive mechanism 42 is used to drive the second reflector 22 , for example to drive the second reflector 22 to rotate.

[0043] In an example of the present invention, the first driving mechanism 41 and the second driving mechanism 42 may be motors, and the focusing optical device 3 may be a focusing lens, preferably, the focusing lens is an f-theta lens.

[0044] The incident laser beam 1 is reflected by the first reflector 21 to...

Embodiment 2

[0048] Such as figure 2 As shown, the laser beam shaping device according to another embodiment of the present invention includes a reflective optical device 2 , a focusing optical device 3 and a driving mechanism 4 . Specifically, the reflecting optical device 2 is a mirror, the driving structure 4 is a moving platform, the focusing optical device 3 is a focusing mirror, and the reflecting mirror 2 is installed on the moving platform 4 . Preferably, the motion platform 4 may be a piezoelectric ceramic motion platform, and the focusing mirror 3 may be an f-theta mirror.

[0049] The laser beam 1 reaches the focusing mirror 3 after being reflected by the reflector 2, and the focusing mirror 3 focuses the laser beam 1 onto the processing material 5 to form a spot. Through the method of programming, the motion platform 4 can be controlled to move with a predetermined two-dimensional or three-dimensional trajectory, for example, leaning forward, backward or swinging left and rig...

Embodiment 3

[0053] Such as image 3 As shown, the laser beam shaping device according to yet another embodiment of the present invention includes: a reflective optical device 2 , a focusing optical device 3 , a driving mechanism 4 and a diffractive optical device 6 . Specifically, the reflecting optical device 2 may be a mirror, the driving structure 4 may be a moving platform, the focusing optical device 3 may be a focusing mirror, and the reflecting mirror 2 is installed on the moving platform. Preferably, the motion platform is a piezoelectric ceramic motion platform, and the focusing mirror is an f-theta mirror.

[0054] The laser beam 1 forms a beam with a predetermined shape after being diffracted by the diffractive optical device 6, such as a rectangle, an ellipse, etc., and then the beam with a predetermined shape reaches the focusing mirror 3 after being reflected by the reflecting mirror 2, and passes through the focusing mirror 3. After focusing, a light spot of a predetermine...

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 laser beam shaping method and device, wherein the laser beam shaping method comprises the following steps of: providing a laser beam; reflecting the laser beam to an optical device with a focusing characteristic through an optical reflector to ensure that the laser beam focuses to obtain a light spot; and enabling the optical reflector to move at a preset track within preset time to obtain a spot array with a preset shape and / or a power density with preset size and distribution. According to the laser beam shaping method and device provided by the embodiment of the invention, the shape and / or the power density with the preset size and distribution of a spot array are changed according to the movement track and the movement speed of the optical reflector in real time.

Description

technical field [0001] The invention relates to a laser beam shaping method and a laser beam shaping device. Background technique [0002] Laser beam shaping is to transform an incident laser beam with approximately Gaussian distribution into an accurate laser beam with almost arbitrary power distribution, such as a circular or rectangular uniform beam, or other complex beams with almost arbitrary power distribution. Applications include laser heat treatment (laser cutting, drilling, welding, remelting, hardening, coating, etc.), surface annealing of mechanical and electronic devices, laser direct write heads, optical signal processing, etc. The traditional laser beam shaping is to irradiate the laser beam on the diffractive optical device, and output the required shape, array and corresponding power density size and distribution of the spot through diffraction, and irradiate the surface or inside of the processed workpiece through the subsequent optical device. [0003] Ho...

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): G02B27/09B23K26/06B23K26/064
Inventor 宁军魏志凌
Owner KUNSHAN THETA MICRO
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com