Hitachi Chemical Company, Ltd.

Toshihiro Kuroda

Daichi Sakai

Shigeyuki Yagi

Tomoaki Shibata

Rei Yamamoto

Masao Uchigasaki

Nobuo Miyadera

Hiroshi Betsui

Madoka Kondou

Kouta Segawa

Hiroshi Masuda

Tomoto Kawamura

Atsushi Takahashi

Toshiteru Nakamura

Tatsuya Makino

Toshihiko Takasaki

Tooru Takahashi

Masatoshi Yamaguchi

Masami Ochiai

Yutaka Kawakami

Shigeru Koibuchi

Naoya Suzuki

Kyouichi Sasaki

Hiromichi Aoki

Toshiyuki Takaiwa

Atsushi Yoshino

Hiroaki Kikuchi

The purpose of the present disclosure is to provide a small optical integrator for increasing color mixing property and homogeneity. An optical integrator is provided with a light entrance surface and exit surface (), and side surfaces () that connect the entrance surface and the exit surface, and is internally filled with a light guide material having a refractive index. The light guide material contains scattering particles for scattering light that have a refractive index different from the refractive index of the light guide material. The light that has entered via the entrance surface propagates from the entrance surface side toward the exit surface while being scattered by the scattering particles in the light guide material, wherein part of the scattered light is guided to the exit surface by propagating while being confined, by internal reflection on the side surfaces, in the light detector.

Optical integrator and video projection device using same

Provided is a substrate with a lens, including: a substrate; a columnar member provided on one surface side of the substrate; and a lens member provided on the columnar member. While arbitrarily selecting the height of the lens, the lens is formed in a uniform and desired shape. Thus, the distance between the lens and another optical member can be reduced and the pitch of the lens can be reduced.

Substrate with lens and production method therefor, and optical waveguide with lens

The optical waveguide includes: a lower clad layer, a core layer, an upper clad layer, a substrate, and a mirror, the lower clad layer, the core layer, and the upper clad layer being sequentially laminated to the substrate, the mirror being formed on the core layer, in which the substrate has an opening, the maximum diameter of the opening is larger than that of luminous flux reflected by the mirror, and the maximum diameter of the opening is 240 &#x3bc;m or less. The optical waveguide is capable of transmitting a light signal regardless of the type of the substrate, suppressing the spread of a light signal reflected from the mirror, and transmitting a light signal with a low optical transmission loss.

Optical waveguide and manufacturing method thereof

The optical waveguide with mirrorof the present invention includes: a lower clad layer; a core patternformed above the lower clad layer; a mirrorformed on the inclined surfaceof the core pattern; an upper clad layercovering the part other than the mirroron the core pattern; and an openingwith an approximate pillar shape, the opening being formed on the upper clad layer, wherein the mirroris formed in the opening

Optical waveguide with mirror, optical fiber connector, and manufacturing method thereof

The present invention relates to an optical waveguide comprising a lower cladding layer, a patternized core layer and an upper cladding layer, wherein a striking part for positioning is provided in one end part thereof, and an optical path turning mirror face is formed in a position different from a striking part-forming end part in the above core layer. Capable of being provided are an optical waveguide and an optoelectronic circuit board each having a simple configuration in which an optical device is not mounted on an optical wiring part or an optoelectronic composite wiring part and capable of connecting an optical device with a core of an optical waveguide in an optical wiring part (optical waveguide) or an optoelectronic composite wiring part (optoelectronic circuit board) at a high position accuracy and an optical module comprising an optical waveguide or an optoelectronic circuit board and a connector.

Optical waveguide, opto-electric hybrid board, and optical module

The present invention relates to a flexible opto-electric combined circuit board in which an optical waveguide film provided with a core and a clad is bonded to a flexible electric wiring board, wherein a reinforcing material is provided to at least a part of an optical waveguide film side in a bent part and electronic devices prepared by using the above flexible opto-electric combined circuit board. Capable of being provided are an opto-electric combined circuit board in which an optical waveguide film is bonded to a flexible electric wiring board and in which braking and cracking are not generated by bending or folding back and electronic devices prepared by using the above opto-electric combined circuit board.

Opto-electric combined circuit board and electronic devices

There are provided an optical waveguide including: a substrate; a lower clad layer; a core patternwith a taper in thickness direction; and an upper clad layer, the lower clad layer, the core pattern, and the upper clad layer being sequentially laminated on the substrate, in which the lower clad layerhas a cutting part. There also provided with an optical waveguide including: a substrate; a lower clad layer; a core patternwith a taper in thickness direction; and an upper clad layer, the lower clad layer, the core pattern, and the upper clad layer being sequentially laminated on the substrate, in which the lower clad layerhas a dummy part on the top. These optical waveguides can secure alignment tolerance when connected with an optical element.

Optical waveguide

According to a manufacturing method of an optical waveguide substrate including a core () and clads () () and provided with an optical axis conversion mirror () in the core and an alignment recess for the optical axis conversion mirror with respect to a light receiving and emitting element, the recess is obtained by obtaining an outline of the core by synthesizing at least an image captured by focusing a microscope () to a highest position () of the core in an optical axis conversion mirror portion and an image captured by focusing the microscope to a lowest position (), and by determining a position of the alignment recess in reference to a center of gravity of the outline, and according to an optical waveguide substrate obtained by this manufacturing method, it becomes possible to provide an optical waveguide substrate in which the optical axis conversion mirror in the optical waveguide substrate and the light receiving and emitting element are aligned with respect to each other at an extremely high degree of accuracy and a manufacturing method thereof.

Optical waveguide substrate and method for manufacturing same

An optical waveguide contains a lower cladding layer, a patterned core layer, an upper cladding layer and an upper low elasticity layer, which are laminated in this order, in which a film formed by curing a resin composition for forming the upper low elasticity layer has a tensile elastic modulus of from 1 to 2,000 MPa at 25&#xb0; C., and a cured film having a thickness of 110 &#x3bc;m formed by curing a resin composition for forming the upper cladding layer has a total light transmittance of 90% or more. An optical waveguide that has good flexural resistance and good optical characteristics can be provided.

An optical connecting structure has an optical fiber, a pressing member having a circular outer cross section, and an optical member, wherein the optical member has an optical element, an optical fiber stopper structure, and an optical fiber holding groove, wherein the optical fiber stopper structure is positioned between the optical element and the optical fiber holding groove, wherein the optical fiber is inserted along the optical fiber holding groove so as to contact with the optical fiber stopper structure, and wherein the pressing member is arranged on the optical fiber holding groove mutually perpendicular, the pressing member presses the upper surface of the optical fiber to a direction of a bottom of the optical fiber holding groove, and the optical fiber and the optical element are thereby optically connected.

Optical connecting structure

An optical device to be connected to an optical fiber and an optical system in which the optical fiber is fixed to the optical device are provided, which optical device and optical system can restrict variations in a distance between inclined surfaces for supporting the optical fiber, and can enhance a productivity of the optical device and system. The optical system according to the present invention is, for example an optical multiplexer/demultiplexer having an optical device according to the present invention, which device has a substrate () with a crystal axis, and a groove () for supporting an optical fiber (). The groove () has a pair of opposing inclined surfaces () for supporting the optical fiber (), and a recess () formed between the pair of opposing inclined surfaces ().

Optical device, optical system, and method of manufacturing optical device

An optical system comprising a substrate and an optical waveguide which is formed on the substrate and to which optical fibers are optically coupled. The optical waveguide has a plurality of straight core portions which obliquely intersect each other. The substrate has positioning sections for positioning a plurality of optical fibers optically coupled to two or more of the plurality of the core portions, the positioning sections having grooves on which the respective optical fibers are supported. When the plurality of optical fibers are supported on the respective grooves, offsets between centers of the plurality of the core portions and respective centers of the plurality of the optical fibers coupled to the core portions are equal to or less than 5 &#x3bc;m.

Optical system and method of manufacturing the same

An optical device is provided to prevent a dicing blade form being clogged when a wafer is cut by means thereof. Further, an optical device is provided to the present invention can prevent unnecessary expansion of a resin used in the optical device. The present invention relates an optical device having a substrate and an optical waveguide layer laminated thereon. The optical waveguide layer has a first lateral surface connected to an optical fiber or an optical fiber array and a second lateral surface not connected to the same. The substrate has a lateral surface disposed on the same side as that of the second lateral surface of the optical waveguide layer. At least a portion of the second lateral surface of the optical waveguide layer is disposed in a plane different from the lateral surface of the substrate so that an exposed area of the substrate is formed between the second lateral surface of the optical waveguide layer and the lateral surface of the substrate.

Optical device

An optical element combination structure in which an optical fiber and an optical waveguide are combined with each other and which can reduce fluctuation of coupling loss due to a change in environmental temperature is provided. The present invention relates to an optical element combination structure in which an optical fiber and an optical waveguide are combined with each other. An optical element combination structure according to the present inventioncomprises an optical fiberand a substrateon which an optical waveguideis formed. The substratehas a V-shaped cross-sectional grooveformed so that the optical fiber and the optical waveguide are aligned with each other, and a recessformed on a waveguide side relative to the groove. The optical fiber is secured to the V-shaped cross-sectional groovewith an adhesive. A tipof the optical fiberprotruding into the recessand the optical waveguideare coupled to each other with a coupling agent with which the recess and a space between the optical fiber and the optical waveguide are filled.

Optical element combination structure and optical fiber structure

A method for the preparation of an optical waveguide device characterized in that it comprises a first step for forming a first resin film on a substrate provided thereon with a lower clad layer; a second step for patterning the first resin film into a shape of an optical waveguide to thus form a core layer; a third step for forming a second resin film by coating the surfaces of the lower clad layer and the core layer with a solution containing a material for forming the second resin film according to the spin-coating method in such a manner that the thickness of the resulting film as measured from the upper surface of the lower clad layer and as determined after drying ranges from 3 to 10 times the thickness of the core layer and then drying the coated layer; and a fourth step for removing the second resin film in such a manner that the thickness of the second resin film as determined from the upper surface of the lower clad layer is less than 3 times that of the core layer and that the second resin film thus serves as the upper clad layer; and characterized in that in the third step, a means for controlling the evaporation rate of the solvent in the solution containing the material for forming the second resin film is provided. The method permits the production of an optical waveguide device made of a resin, which is free of air bubbles at the branched portion of the waveguide device, the air bubbles being adversely affecting the transmission efficiency of the optical waveguide.

Growing community of inventors

Ibaraki, Japan

Toshihiro Kuroda