Hosiden Corporation

Keio University

Kosuke Sasada

Hayato Kondo

Takayuki Nagata

Hiroshi Nakagawa

Takeshi Isoda

Tadahiro Kuroda

Yasuhiro Shigeno

Akihiro Tanaka

Keiji Mine

Toshiharu Miyoshi

Naoya Takehara

Shuhei Tsubota

A lens including a lens body and a support. The lens body includes at least one lens portion and at least one holding hole for holding at least one optical fiber. A central axis of the or each holding hole is positioned on a phantom line extending through an optical axis of the or a corresponding lens portion. The support includes a support body fixed to the lens body. With a first portion of the or each optical fiber securely received in the or a corresponding holding hole, a bottom face of the or each holding hole abuts an end face of the first portion of the or a corresponding optical fiber, a peripheral face of the or each holding hole partly abuts an outer peripheral face of the first portion of the or a corresponding optical fiber, and the support body supports a second portion of the or each optical fiber.

Lens, lens and optical fiber assembly, and optical communication system

A module and system are provided for reducing or suppressing ringing occurring in a digital signal to be transmitted. A transmission module Ma includes a transmitterconfigured to transmit a digital signal, a transmission antennaconstituted by a metal plate, or by a conductor formed on an insulator, the transmission antennabeing configured to be electromagnetically or magnetically coupled to a reception antennaof a non-contact reception module Mb for digital communication, and a resistorconnected in series between the transmitterand the transmission antenna. The resistorhas such a resistance value that the resistorentirely blunts a waveform of the digital signal outputted from the transmitterso as to reduce or suppress ringing occurring in the digital signal. The blunted digital signal is to be inputted into the transmission antenna

Transmission antenna module, non-contact transmission module, non-contact communication system provided therewith and non-contact communication method

A polycrystal having a physical property that enables an AC resistance value to drop sharply is used to reduce transmission loss of a high frequency signal being transmitted. A high frequency transmission device Dis provided that includes a dielectricand a transmission lineadapted for transmitting therethrough high frequency signals. At least part of the transmission lineis located on or inside the dielectric. At least part of the transmission lineis composed of a polycrystal composed of conductor fine particles. The polycrystal has a physical property such that, when a high frequency signal to be transmitted through the transmission lineis of frequencies within one or more specific frequency bands, the AC resistance value drops sharply.

High frequency transmission device and high frequency signal transmission method

The invention provides a shield shell that allows easy insertion of a circuit board or other insulator into the shield shell. A shield shellincludes a shell bodyand first and second position restrictorsand. The first position restrictoris provided at an edge portionof an insertion portof the shell bodyand is located inside the insertion port. The second position restrictoris provided in the shell bodyso as to oppose the first position restrictorwith a spacing in a Z-Z' direction. A distance in the Z-Z&#x2032; direction from the first position restrictorto the second position restrictoris substantially equal to, or slightly larger than, a distance in the Z-Z&#x2032; direction from a first faceto a second faceof a circuit board. When the circuit boardis inserted into the shell bodythrough the insertion port, the first position restrictorand the second position restrictorare abuttable on the first faceand the second face, respectively, of the circuit board

Shield shell, connector, mating connector, connection structure of connectors, and method for manufacturing connector

Ringing occurring in a digital signal to be transmitted, is reduced or suppressed. A transmission module Ma includes a transmitterconfigured to transmit a digital signal, a transmission antennaconstituted by a metal plate, or by a conductor formed on an insulator. The transmission antennais configured to be electromagnetically or magnetically coupled to a reception antennaof a non-contact reception module Mb for digital communication. A resistoris connected in series between the transmitterand the transmission antenna. The resistorhas such a resistance value that the resistorentirely blunts a waveform of the digital signal outputted from the transmitterso as to reduce or suppress ringing occurring in the digital signal. The blunted digital signal can be inputted into the transmission antenna

An optical fiber including a circuit board, a converter, an optical fiber, an external connecting part, and a pressable part. The circuit board includes first and second faces opposite to each other. The first face has first and second regions being different regions. The second face has third and fourth regions on the opposite side to the first and second regions, respectively. The converter is an opto-electronic or electro-optic converter on the first region of the circuit board. The optical fiber includes a leading end portion optically connected to the converter. A circuit on the first region of the circuit board is electrically connected to the converter. The external connecting part is disposed on the fourth region of the circuit board. The pressable part is fixed to the circuit board and positioned on the second region of the circuit board without contacting the converter, the optical fiber, or the circuit.

Optical fiber assembly and connection structure of optical fiber assembly and electronic device

A photoelectric conversion module includes a substrate, a photoelectric conversion component mounted on the substrate, a wiring pattern formed on the substrate and electrically connected to the photoelectric conversion component, the wiring pattern having a power source line for supplying power to the photoelectric conversion component, a shield cover for covering the photoelectric conversion component, and a first filter inserted into the power source line in series.

Photoelectric conversion module and active fiber-optic cable

A board edge connector to which a board is inserted along an oblique direction relative to its fixed posture includes a main body, a plurality of contacts arranged in juxtaposition on the main body along a direction perpendicular to an insertion direction of the board, and a cover member covering the main body. The main body includes a base portion on which the multiple contacts are juxtaposed and a pair of arm portions extending from the base portion along opposed lateral edges of the board which assumes a fixed posture. The cover member includes an attaching portion covering the base portion and a pair of arm members covering lateral faces of the pair of arm portions, the pair of arm members being formed integral with the attaching portion.

Board edge connector

A transmission connector includes a transmission optical module having a signal electrode inputting/outputting an electric signal and a transmission receptacle having a contact to be electrically connected to the signal electrode when fitted to the transmission optical module. The transmission modules includes a second cutout for preventing erroneous fitting to a reception receptacle. The transmission receptacle includes a first projection for preventing erroneous fitting to a reception optical module.

Growing community of inventors

Yao, Japan

Kosuke Sasada