公开(公告)号：US20200208959A1

公开(公告)日：2020-07-02

申请号：US16232689

申请日：2018-12-26

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Yuan Chin LEE ,  Ting Wei CHANG ,  Chi Shen CHANG ,  Chy Lin WANG

IPC: G01B9/02 ,  G02B27/12

Abstract: An optical interferometer includes a beam splitter module and an optical sensor. The beam splitter module includes a lens assembly and a splitter cube. A light incident surface of the splitter cube is substantially orthogonal to an optical axis of the lens assembly. An acute angle is between the light incident surface and a light splitting surface of the splitter cube. A sampling surface of the splitter cube is substantially parallel to the light incident surface. A light reflecting surface of the splitter cube is substantially orthogonal to the light incident surface. The light incident surface is closer to the lens assembly than the sampling surface. A reference arm is defined between a splitter position on the light splitting surface and the light reflecting surface, a sample arm is defined between the splitter position and the sampling surface, and the reference arm is longer than the sample arm.

公开(公告)号：US20240210159A1

公开(公告)日：2024-06-27

申请号：US18086427

申请日：2022-12-21

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Chy Lin WANG ,  Chi Shen CHANG ,  Yuan Chin LEE

IPC: G01B9/02091

CPC classification number: G01B9/02091

Abstract: An OCT common-path probe for identifying a sample includes an optical fiber, a first GRIN lens and a second GRIN lens. The optical fiber outputs a light beam from its end facet. The first GRIN lens is cemented to the second GRIN lens, and located between the optical fiber and the second GRIN lens. A joint surface between the first GRIN lens and the second GRIN lens reflects a part of the light beam to form a reference beam, and allows another part of the light beam to pass through to form a sample beam. The reference beam is focused on the end facet by the first GRIN lens. The sample beam is focused on the sample by the second GRIN lens, reflected by the sample to travel through the second GRIN lens, the joint surface and the first GRIN lens sequentially, and thereby focused on the end facet.