Apparatus and method for laser beam shaping and scanning

US10884250B2 · kind B2 · utility

Assignee

• The Chinese University of Hong Kong · CN

Inventors

• Shih-Chi Chen · Hong Kong, CN
• Qiang Geng · Longbeilingcun, CN
• Dien Wang · Hong Kong, CN
• Pengfei Chen · Hubei, CN
• Dapeng Zhang · Hong Kong, CN

Key dates

• Filing date: Jul 29, 2019
• Grant date: Jan 5, 2021
• Expiry date: Jul 29, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G03H2225/24
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An apparatus and a method for laser beam shaping and scanning. The apparatus includes a digital micromirror device (DMD) including a plurality of micromirrors, configured to receive a first laser beam, adjust an axial position of a focal point of the first laser beam along a moving direction of the first laser beam by controlling a focal length of wavefront of a binary hologram applied to the DMD, and adjust a lateral position of the focal point on a plane perpendicular to the moving direction by controlling a tilted angle of a fringe pattern and a period of fringes of the binary hologram applied to the DMD, wherein the DMD simultaneously functions as programmable binary mask and a blazed grating.