公开(公告)号：US20230048604A1

公开(公告)日：2023-02-16

申请号：US17785737

申请日：2019-12-16

Applicant: JASCO CORPORATION ,  NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY

Inventor： Takashi FUKUDA ,  Akira EMOTO ,  Yoshihito NARITA ,  Hiroshi HAYAKAWA ,  Yuichi MIYOSHI

IPC: G01J4/00 ,  G02B5/18 ,  G02B5/00

Abstract: The present invention provides a reflective polarized-light separating diffraction-element usable in a wide wavelength region including an ultraviolet region, and an optical measurement device comprising the same. The reflective polarized-light separating diffraction-element comprises: a substrate (1); a reflection surface (2) formed on a surface of the substrate (1); and a lattice structured body assembly (3) that is provided on the reflection surface (2) and shows a form birefringence (Δn*). The lattice structured body assembly (3) consists of lattice structured bodies (3A, 3B, 3C and 3D) of four patterns having lattice structures of different azimuths. The lattice structured bodies (3A, 3B, 3C and 3D) of a plurality of patterns are aligned on the reflection surface 2 in a predetermined direction such that the azimuths of the lattice structures change in a structurally periodic manner.

公开(公告)号：US20220155218A1

公开(公告)日：2022-05-19

申请号：US17439480

申请日：2019-07-17

Applicant: JASCO CORPORATION

Inventor： Yuichi MIYOSHI ,  Yoshiro KONDO

IPC: G01N21/19 ,  G01J4/04

Abstract: A circular dichroism measurement device includes: a sample part having a sample; a PEM that modulates a polarization state of an incoming light to the sample part or an outgoing light from the sample part; a photo detector that detects a change in a light intensity of the outgoing light from the sample part; an amplifier that amplifies a detection signal from the photo detector; an A/D converter that converts the detection signal amplified by the amplifier to a digital signal; and a digital processing device that executes a signal processing to the digital signal from the A/D converter to acquire a measurement value of circular dichroism of the sample. The A/D converter is configured to convert the detection signal, that is amplified in a state of containing the AC component and the DC component of the light intensity that changes with the same frequency as the modulation frequency of PEM.