公开(公告)号：US20200378752A1

公开(公告)日：2020-12-03

申请号：US16071089

申请日：2017-01-19

Applicant: YEDA RESEARCH AND DEVELOPMENT CO. LTD.

Inventor： Igor LUBOMIRSKY ,  Guy LAZOVSKI

IPC: G01B11/16 ,  G01N25/16 ,  G01N21/21 ,  G01N21/17

Abstract: Methods, devices and apparatus for measuring expansion/contraction properties of a material are described. According to an embodiment a method comprises: providing a device, said device comprising a sample comprising said material, said sample comprising a first surface and a second surface, a first substrate and a second substrate connected to said first surface and to said second surface of said sample, respectively, a reflective material attached to said second substrate, and two electrical contacts each independently in contact with said sample; applying voltage to said sample using said electrical contacts; illuminating said reflective material using a light source, such that said illumination comprises light having known and controllable polarization; collecting light reflected off said reflective material; measuring amplitude and phase of an oscillating change in polarization of the reflected light; and extracting parameters related to expansion/contraction from said reflected light measurement, thus evaluating said expansion/contraction properties of said material.