公开(公告)号：US20190071868A1

公开(公告)日：2019-03-07

申请号：US15853826

申请日：2017-12-24

Applicant: Industrial Technology Research Institute ,  National Tsing Hua University

Inventor： Yang-Shan Lin ,  Che-Ming Chang ,  Po-Yu Chen ,  Haw-Kai Chang

IPC: E04B1/84

Abstract: A sound absorbing material according to the present disclosure is provided, which includes a polymeric body having a first end, a second end opposed to the first end, and a plurality of branched passages connected to the first end and extending toward a direction of the second end. The plurality of branched passages have an average spacing of 5 μm to 50 μm therebetween and an average width of 5 μm to 50 μm.

公开(公告)号：US10067012B2

公开(公告)日：2018-09-04

申请号：US15618145

申请日：2017-06-09

Applicant: NATIONAL TSING HUA UNIVERSITY

Inventor： Wei-Chung Wang ,  Po-Chi Sung ,  Zheng-Yong Lu ,  Yu-Liang Yeh ,  Po-Yu Chen

IPC: G01L1/24 ,  G03F1/32 ,  G01L5/00

CPC classification number: G01L1/24 ,  G01L1/241 ,  G01L5/0047 ,  G03F1/32 ,  G03F1/82

Abstract: A stress measurement method is provided of the present disclosure. The stress measurement method includes an image capturing procedure, a phase shift calculation procedure, an isochromatic intensifying procedure and a transformation procedure. The image capturing procedure is used to capture four light intensity images with four different phase angles of a sample. The phase shift calculation procedure is used to obtain an isochromatic retardation of the sample when the four light intensity images have sufficient light intensity values. The isochromatic intensifying procedure is used to calculate two enhanced light intensity values, the background of intensified isochromatic light intensity value and the amplitude of intensified isochromatic light intensity value to obtain an isochromatic retardation when the sample is in a low stress condition. The transformation procedure is used to transform the isochromatic retardation to a stress value of the sample.