Abstract:
A method of manufacturing an optical waveguide includes forming a core layer on a first clad layer, forming a second clad layer on the core layer, forming a first groove including at least one inclined surface in the second clad layer and the core layer to be in substantially parallel to and near one end of the second clad layer and one end of the core layer, the at least one inclined surface of the first groove having such an angle that the core layer is exposed when viewed above the second clad layer, forming a second groove including at least one inclined surface in the second clad layer on a inner side of the first groove, forming a separation groove in the clad layers and the core layer in a direction intersecting the first groove, and forming a plurality of cores intersecting the first groove.
Abstract:
An optical waveguide film includes: an optical waveguide film main body including an optical waveguide core through which light travels and a cladding portion that encloses the optical waveguide core and has a lower refractive index than that of the optical waveguide core; and a marking member that is disposed at least at a portion of a principal surface of the optical waveguide film main body so as to protrude from the principal surface and that includes, at a surface thereof, a groove-shaped mark for positioning.
Abstract:
A polymer optical waveguide includes: at least one core through which light propagates; a cladding which surrounds the core and has a refractive index less than that of the core; at least one conductive wire being provided on at least one side of the cladding, the polymer optical waveguide having a sheet shape, the conductive wire including a conductive layer which is provided on the at least one side of the cladding and being partitioned by a first groove, and the core being formed between second grooves each of which is formed in at least a part of the first groove.
Abstract:
An optical waveguide comprising: a waveguide core through which light propagates; a cladding that surrounds the waveguide core and has a refractive index that is less than the refractive index of the waveguide core; a metal layer that is formed on a surface of at least one end of the optical waveguide in a longitudinal direction, the surface being inclined so as not to be perpendicular to the longitudinal direction; and a channel that is formed at a portion of an outer surface of the cladding, the outer surface forming an acute angle with the inclined surface, and the channel being positioned such that light entering the optical waveguide adjacent the channel is reflected by the inclined surface into the waveguide core.
Abstract:
A method of manufacturing an optical waveguide includes forming a core layer on a first clad layer, forming a second clad layer on the core layer, forming a first groove including at least one inclined surface in the second clad layer and the core layer to be in substantially parallel to and near one end of the second clad layer and one end of the core layer, the at least one inclined surface of the first groove having such an angle that the core layer is exposed when viewed above the second clad layer, forming a second groove including at least one inclined surface in the second clad layer on a inner side of the first groove, forming a separation groove in the clad layers and the core layer in a direction intersecting the first groove, and forming a plurality of cores intersecting the first groove.
Abstract:
An optical waveguide includes: a core portion through which light propagates, a cladding portion enclosing the core portion along a direction of light propagation, and a colored resin for position recognition marking, the optical waveguide having substantially planar outer surfaces including principal surfaces thereof, and the colored resin being embedded in the optical waveguide at a position that does not substantially overlap the core portion when viewed from a direction perpendicular to a principal surface of the optical waveguide and does not substantially contact the core portion.
Abstract:
A process for producing a polymer optical waveguide including: 1) preparing a rubber mold having a composite layer structure in which a rubber layer which has a concave portion corresponding to an optical waveguide core and contains a rubber mold-forming curable resin is buried in a rubber layer-forming concave portion of a rigid substrate having the rubber layer-forming concave portion; 2) bringing a cladding substrate into close contact with the rubber mold; 3) filling the concave portion of the rubber mold, with which the cladding substrate has been brought into close contact, with a core-forming curable resin; 4) curing the filled core-forming curable resin; 5) removing the rubber mold from the cladding substrate; and 6) forming a cladding layer on the cladding substrate on which the core has been formed.
Abstract:
First and second shroud surfaces are defined along an imaginary cylinder coaxial to a recording disk. A shroud plate is located between the first and second shroud surfaces. Airflow flows outward along the surface of the rotating recording disk based on the centrifugal force. The shroud plate serves to establish the continuity of the first and second shroud surfaces. The first and second shroud surfaces and the shroud plate serve to reliably suppress turbulence of the airflow. Vibration of the recording disk is suppressed than ever. An inflow opening is located in a space between the first and second shroud surfaces. The rectifier plate is located downstream of the inflow opening. The rectifier plate serves to direct the airflow flowing along the first shroud surface to the inflow opening. A larger amount of airflow can be introduced into the inflow opening. A dust catcher receives airflow of a sufficient amount.
Abstract:
A lens-incorporating optical waveguide includes: a core; a clad enclosing the cores; and a lens provided in the core so as to cross a propagating direction of light.
Abstract:
An optical transmission unit of an optical reception and transmission module holds a first end portion of the optical waveguide film on the first holding member so that light emitted from the light emitting device is coupled to an incident end surface of the optical waveguide. An optical reception unit holds a second end portion of the optical waveguide film on the second holding member so that light emitted from an emitting end surface of the optical waveguide is received by the light receiving device. At least the optical waveguide film is covered with flame-retardant resin having flame retardancy of HB or higher according to a UL-94 test and a minimum bending radius of the optical waveguide film covered with the flame-retardant resin and having a flame-retardant resin layer formed on its surface is from 1 mm to 3 mm.