Toyohashi University of Technology

Hitachi, Ltd.

Kyocera Corporation

Taichi Goto

Mitsuteru Inoue

Tomoya Sugita

Hiroyuki Takagi

Hisashi Endou

Takashi Yamaguchi

Hiroaki Inoue

Yasuyuki Tamba

An isolator includes a substrate, a waveguide and an electronic circuit disposed above the substrate, and a non-reciprocal member disposed above the waveguide and the electronic circuit. The non-reciprocal member includes a first portion in contact with the waveguide and a second portion disposed within a predetermined range from the electronic circuit. Non-reciprocity in the second portion is weaker than non-reciprocity in the first portion.

Isolator and isolator manufacturing method

A defect inspection device configured to measure a surface shape of an inspection target using light applied to the inspection target via a spatial light phase modulator based on an interference state of reflected light from the inspection target obtained via the spatial light phase modulator, to measure magnetic field distribution of a surface of the inspection target magnetized by an excitation device for magnetizing the inspection target using light applied to the inspection target via the spatial light phase modulator based on an interference state of reflected light from the inspection target obtained via the spatial light phase modulator, and to separate data of a magnetic field specific portion which exists on the surface of the inspection target from magnetic field distribution data which is a measurement result of magnetic field distribution of the inspection target based on surface shape data which is a measurement result of the surface shape of the inspection target, to suppress deterioration of measurement accuracy of magnetic field distribution generated by the surface shape of the inspection target and to improve defect detection accuracy.

Defect inspection device and defect inspection method

Provided is an optical body capable of arbitrarily and quickly controlling the optical characteristics of incident light. A refractive index variable layer () formed of PLZT or other material and a magneto-optical material layer () formed of garnet or other material are provided side by side between a first reflective layer () and a second reflective layer (). If linearly polarized light is made incident from the side of the first reflective layer (), the incident light interacts with the magneto-optical material layer () and is converted into a right-circularly polarized light component and a left-circularly polarized light component. A very small retardation occurring between both the right- and left-circularly polarized light components is amplified through multiple reflections between the pair of reflective layers () and is controlled according to a controlled refractive index of the refractive index variable layer ().

Optical body

Growing community of inventors

Toyohashi, Japan

Taichi Goto