Ricoh Company, Ltd.

Tadao Katsuragawa

Wasaburo Ohta

Mikio Kinoshita

Ikue Kawashima

Yasuhiro Satoh

A magneto-optical device is disclosed that includes a non-magnetic support body and a fine particle arrangement layer on the non-magnetic support body. The fine particle arrangement layer includes multiple regularly arranged fine metal magnetic particles. In the magneto-optical device, magnetization is generated by applying an external magnetic field to the fine metal magnetic particles, and linearly polarized light is made incident on the fine metal magnetic particles, so that a magneto-optical effect is increased by the interaction between the incident light on the fine metal magnetic particles and the surface plasmon oscillation of the fine metal magnetic particles.

Magneto-optical device

A magneto-optical device including a substratewhich istransparent to light in a visible spectrum regionand,a plurality of ferromagnetic layersarranged thereon, each ferromagnetic layer preferablyhaving a widthranging fromin an inclusive range of5tothrough100 nanometers and a thicknessranging fromin an inclusive range of0.1tothrough5 microns. The, wherein saidferromagnetic layers are parallel to each other and separated by a distanceranging fromin an inclusive range of0.2tothrough2 microns.The ferromagnetic layers are arranged preferably on the side walls of grooves formed parallel to each other in the transparent substrate.

Magneto-optical recording medium having a plurality of ferromagnetic thin layers

A light control window that includes at least a transparent window substrate and an optical element. The optical element includes at least an optical element main body configured to change the light transmittance through the window upon application of a magnetic field. The optical element main body includes at least a micro-magnetic head array configured to apply the magnetic field to the optical element main body.

Light control window

A magneto-optical light modulator includes a first polarizer, a transparent magneto-optical component including a magneto-optical film deposited on a surface of a substrate, and a second polarizer. The surface of the substrate includes features having a depth in a range of 0.1 &mgr;m to 5 &mgr;m. Side surfaces of the features are covered with the magneto-optical film to a thickness of 5 nm to 200 nm. Light flux from a light source passes through the first polarizer, the magneto-optical component and the second polarizer. Changes in incident light flux intensity can lead to rapid changes in the intensity of light flux transmitted through the magneto-optical light modulator.

Magneto-optical light modulator

A magnetic recording medium has a transparent substrate with a plurality of grooves which extend parallel with each other at regular intervals, each of the grooves having inner side walls perpendicular to the transparent substrate and a space between adjacent side walls being constant, a magnetic material layer extending in the form of a stripe, provided on the surface of the inner side walls of each of the grooves, and a pair of dielectric multi-layers which are disposed so as to sandwich the transparent substrate therebetween.

Magnetic recording medium

A magneto-optical device including a substrate which is transparent to light in a visible spectrum region and a plurality of ferromagnetic layers arranged thereon, each ferromagnetic layer preferably having a width ranging from 5 to 100 nanometers and a thickness ranging from 0.1 to 5 microns. The ferromagnetic layers are parallel to each other and separated by a distance ranging from 0.2 to 2 microns. The ferromagnetic layers are arranged preferably on the side walls of grooves formed parallel to each other in the transparent substrate.

Magneto-optical recording medium having a plurality of ferromagnectic

A polarizer and method of making the polarizer includes forming plural grooved lines on a surface of a supporting body that is transparent to visible light. The plural grooved lines are straight, concave and parallel to one another. Respective of the plural grooved lines include a sidewall portion that has a fine line formed thereon where the fine line constitutes a residual portion of a larger thin film that was subjected to an etching process. The fine line is composed of a semiconductor a metal or a combination of the two.

Light polarizer and method of producing the light polarizer

An apparatus for forming a thin film having a vacuum container evacuated to high vacuum and receiving a gas for vapor deposition, a generation device for generating a material vapor, a counter electrode holding a substrate to be vapor-deposited, a first grid disposed between the generation device and the electrode for accelerating the vapor, and a filament for emitting thermions to ionize the vapor. The grid and counter electrode surfaces may be curved and parallel to each other, and a second grid for accelerating the vapor, having a potential which is negative with respect to the potential of the first grid, may be placed between the first grid and the electrode, in the vicinity of the electrode, and a device may be provided for moving the first grid with respect to the electrode on a predetermined track.

Apparatus for forming a thin film

Magneto-optic recording media and production processes of the same in which a thin magnetic film comprising, as the main ingredient, nitrides of metal (Fe, Co and Ni) and having strong perpendicular magnetic anisotropy is formed directly or indirectly by way of a reflective layer on a non-magnetic support, providing that the reflective layer is formed on the thin magnetic film if the magnetic thin film is disposed directly on the non-magnetic support.

Magneto-optic recording media and process for producing the same

An apparatus for forming a thin film having a vacuum container evacuated to high vacuum and receiving a gas for vapor deposition, a generation device for generating a material vapor, a counter electrode holding a substrate to be vapor-deposited, a first grid disposed between the generation device and the electrode for accelerating the vapor, and a filament for emitting thermions to ionize the vapor. The first grid and counter electrode surfaces may be curved and parallel to each other, and a second grid for accelerating the vapor, having a potential which is negative with respect to the potential of the first grid, may be placed between the first grid and the electrode, in the vicinity of the electrode, and a device may be provided for moving the first grid with respect to the electrode on a predetermined track.

Growing community of inventors

Kanagawa, Japan

Tadao Katsuragawa