公开(公告)号：US11850799B2

公开(公告)日：2023-12-26

申请号：US17973552

申请日：2022-10-26

Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Kuo-Kuang Jen ,  Yi-Cherng Ferng ,  Chia-Hsiang Chang ,  Chun-Hsiang Huang ,  Yuan-Yao Lin ,  Chao-Kuei Lee ,  Yi-Jen Chiu

IPC: B29C64/386 ,  B29C64/153 ,  B29C64/286 ,  B29C64/268 ,  B33Y50/00 ,  B33Y30/00

CPC classification number: B29C64/386 ,  B29C64/153 ,  B29C64/268 ,  B29C64/286 ,  B33Y50/00 ,  B33Y30/00

Abstract: A powdered surface monitoring system of additive manufacturing comprises an additive manufacturing processing cavity, having therein a working area carrying powder to be sintered; a laser source, generating a laser beam, which passes through a reflector, a dichroic mirror and a scanning vibration mirror and is transmitted to an upper surface of the powder in the working area; a polarization imaging device, having therein a beam expander group, a polarizer group and at least one photodetector, the polarizer group consisting of a plurality of linear polarizers, and the number of photodetectors being equal to the number of the linear polarizers.