Sanyo Electric Co., Ltd.

Mitsuaki Matsumoto

Nobuhiko Hayashi

Keiichi Kuramoto

Hitoshi Hirano

Youhei Nakagawa

Koutarou Furusawa

Kazushi Mori

Atsushi Tajiri

Koji Tominaga

Daisuke Ide

Takenori Goto

Hiroaki Izu

Akira Ibaraki

Keiichi Yodoshi

Teruaki Miyake

Kenichi Matsukawa

Yasuyuki Bessho

Masayuki Shono

Shoji Honda

Masaya Nakai

Toru Ishikawa

Takatoshi Ikegami

Atushi Tajiri

Minoru Sawada

Takao Yamaguchi

Tatsuya Kunisato

Tadao Toda

Koji Yamano

Hideyuki Nonaka

An optical waveguide in which a groove is formed on the top surface of a substrate used as a lower clad and a core is formed in the groove, characterized in that the core is formed in such a way that the top face of the core within the groove is at a lower level than the top face of the substrate, and an upper clad may also be provided on the core, and the core is preferably formed from an organic-inorganic hybrid material.

Optical waveguide, optical transmitter and receiver module, and laminated structure

A laminated optical element includes an optical substrate made of an optical material, an intermediate layer provided on the optical substrate, and an optical resin layer provided on the intermediate layer. The optical resin layer is made of a resin composed of an organometallic polymer having an -M-O-M- bond (M is a metal atom), a metal alkoxide and/or a hydrolysate thereof having only one hydrolyzable group, and an organic polymer having a urethane bond and a methacryloxy group or an acryloxy group. The intermediate layer is obtained by dispersing metal oxide microparticles in a matrix resin composed of a metal alkoxide having a radical polymerizable group and a hydrolyzable group and/or a hydrolysate thereof.

Laminated optical element

An optical part for a camera comprising a substrate made of a polyolefin plastic and an optical resin layer placed on the substrate, wherein the surface of the substrate is provided with a polar group and the optical resin layer is formed from a resin composition including a fluorene compound having a (meth)acryloyl group.

Optical part for camera and method of fabricating the same

An organic-inorganic composite forming material which contains an organometallic polymer having an -M-O-M- bond (M denotes a metal atom), an acrylic monomer or oligomer having a hydrophilic group and inorganic particles. Preferably, the organometallic polymer has Si in the place of M and is obtained via hydrolysis and polycondensation of trialkoxysilane having a photo- or thermally-polymerizable group and dialkoxysilane having a phenyl group.

Organic-inorganic composite forming material, organic-inorganic composite, production method thereof and optical element

In the optical waveguide which comprises a core layer to be an optical transmission region and an upper clad layer and a lower clad layer covering the surrounding of the core layer and of which the upper clad layer is formed while being shrunk in the volume, a stress moderating layer formed a material with a smaller storage modulus than that of the upper clad layer is formed between the upper clad layer and the lower clad layer in at least a portion of a region where the upper clad layer and the lower clad layer are brought into contact with each other.

Optical waveguide

An optical element has a marker provided in the form of an optical fault at a predetermined location in the effective optical area thereof for positioning. The optical fault is a markerprovided at a specific location on the effective optical area of the optical elementpreferably in the form of a projection, a recess, a tinted portion, a different refraction portion, an air bubble, or a particle on or in the optical element. More preferably, the markeris located at or around the center of the optical elementand its area size is not greater than 0.4% of the effective optical area of the lens

Optical element, optical system and methods of manufacturing the same as well as optical equipment

Disclosed herein is an optical waveguide comprising a core layer to be an optical waveguide region, an upper clad layer covering the core layer and a lower clad layer, characterized in that an ultraviolet control region for preventing ultraviolet light from entering is provided at any one location of under the lower clad layer, on an interface of the lower clad layer and the upper clad layer, and on the upper clad layer. And a method of fabricating this optical waveguide is also disclosed.

Optical waveguide and the method of fabricating the same

Disclosed herein is an optical waveguide comprising a core layer to be an optical transmission region, an upper clad layer and a lower clad layer covering the core layer, in which the core layer, the upper clad layer and the lower clad layer are formed from resin materials, characterized in that a microlens made of a material having a higher refractive index than that of a material constituting said core layer is disposed in the vicinity of an end face of said core layer.

An organometallic polymer material is obtained which excels in translucency, shows improved hardness after it is cured and exhibits high reliability at high temperature and high humidity. Characteristically, the organometallic polymer material contains an organometallic polymer having an &#x2014;M&#x2014;O&#x2014;M&#x2014; bond (M indicates a metal atom), a metal alkoxide having a single hydrolyzable group and/or its hydrolysate and an organic polymer having a urethane bond and a methacryloxy or acryloxy group, and preferably further contains an organic anhydride and/or an organic acid.

Organometallic polymer material

An organometallic polymer material having a -M-O-M- bond (M is a metal atom) and containing a metal alkoxide having only one hydrolyzable group and/or a hydrolysate of the metal alkoxide and preferably further containing an organic acid anhydride and/or an organic acid.

Organometallic polymer material and process for preparing the same

A method of manufacturing an element having a microstructure of an excellent grating groove pattern or the like is obtained. This method of manufacturing an element having a microstructure comprises steps of forming a metal layer on a substrate, forming a dot column of concave portions on the surface of the metal layer and anodically oxidizing the surface of the metal layer formed with the dot column of concave portions while opposing this surface to a cathode surface thereby forming a metal oxide film having a grating groove pattern. When the interval between the concave portions of the dot column is reduced, therefore, a linear grating groove pattern having a large depth with a uniform groove width along the depth direction is easily formed in a self-organized manner.

Element having microstructure and manufacturing method thereof

An optical device includes a substrate, a core provided on the substrate, a first clad and a second clad formed around the core. The optical device further includes a light absorber layer, provided on the substrate, which absorbs light leaked from the core. The light absorber layer is formed of, for instance, the same material as that constituting the core.

Optical device and method for manufacturing the same

Method of forming grating microstrutures by anodic oxidation

An optical branch device, comprising: a branch portion having a first branch waveguide extended linearly and continuously from a waveguide in a basis portion, and second and third branch waveguides extended in the directions farther from the first branch waveguide in such a manner that the first branch waveguide is interposed between the second and third branch waveguides; a parallel portion in which the second and third branch waveguides are positioned in parallel to the first branch waveguide; and a divergent portion in which the second and third branch waveguides are extended gradually farther from the first branch waveguide; wherein the interval pitch P (&#x3bc;m), in the transverse direction, between the first, second and third branch waveguides in the parallel portion and the refractive index difference (&#x394;n) between the core and the clad are set in such a manner that C satisfies a relationship of C=0.5&#xb1;0.2 wherein C is calculated by substituting P and &#x394;n for an equation of C=&#x394;n&#xd7;P.

Optical branch device and optical coupler module

In a holographic pattern provided in a holographic optical element, a patterntwists a diffracted light beam in a clockwise direction, to form a semi-circular light spot Sa on photodetection parts A and B so as to extend over a dividing line LX in a four-segment photodetection part. A patternsimilarly twists the diffracted light beam in a clockwise direction, to form a semi-circular light spot Sb on photodetection parts C and D so as to extend over a dividing line LX in the four-segment photodetection part.

Holographic optical element, position shift detecting apparatus, optical pickup apparatus, optical recording medium drive and method of fabricating holographic optical element

Growing community of inventors

Osaka, Japan

Mitsuaki Matsumoto