Abstract: An optical coupling device includes a power lead with a first portion and a power line portion. A light-emitting element is disposed on the first portion. A ground lead includes a ground line portion and a second portion with a drive circuit disposed thereon. A first input frame in the device includes a first input terminal portion and a first input signal line portion. A second input frame in the device includes a second input terminal portion and a second input signal line portion. The first and second input frames are adjacent to each other and a minimum distance from the first input signal line portion to the first installation portion is greater than a minimum distance from the first input signal line portion to the power line portion.

Abstract: An optical coupling device includes a power lead with a first portion and a power line portion. A light-emitting element is disposed on the first portion. A ground lead includes a ground line portion and a second portion with a drive circuit disposed thereon. A first input frame in the device includes a first input terminal portion and a first input signal line portion. A second input frame in the device includes a second input terminal portion and a second input signal line portion. The first and second input frames are adjacent to each other and a minimum distance from the first input signal line portion to the first installation portion is greater than a minimum distance from the first input signal line portion to the power line portion.

Abstract: According to one embodiment, an optical communication module includes an optical unit and an optical connector. The optical unit includes an optical semiconductor element and a base. The optical semiconductor element has a first optical axis. The base has a first surface and a mounting portion to mount an optical connector. The first surface is perpendicular to the first optical axis. The base is provided with the optical semiconductor element. The optical connector is mounted at the mounting portion and is capable of rotating around the first optical axis. The optical connector includes a first housing and a light-guiding body. The first housing has a second surface facing the first surface and a second axis crossing the first optical axis at a first angle. The light-guiding body is provided inside the first housing and has an end plane perpendicular to the second axis.

Abstract: According to one embodiment, a photodiode includes a first semiconductor layer of a first conductivity type, a second semiconductor layer of a second conductivity type, a third semiconductor layer of the first conductivity type, and a film. The second semiconductor layer is provided in the first semiconductor layer. The third semiconductor layer is provided in the first semiconductor layer so as to surround the second semiconductor layer. Each of one ends of the second and third semiconductor layers is located at an upper surface of the first semiconductor layer. The first to third semiconductor layers include first to third impurity concentrations respectively. The second and third impurity concentrations are higher than the first impurity concentration. The film is provided above the third semiconductor layer, and blocks light to enter into a neighborhood of the third semiconductor layer.

Abstract: According to one embodiment, a photodiode includes a first semiconductor layer of a first conductivity type, a second semiconductor layer of a second conductivity type, a third semiconductor layer of the first conductivity type, and a film. The second semiconductor layer is provided in the first semiconductor layer. The third semiconductor layer is provided in the first semiconductor layer so as to surround the second semiconductor layer. Each of one ends of the second and third semiconductor layers is located at an upper surface of the first semiconductor layer. The first to third semiconductor layers include first to third impurity concentrations respectively. The second and third impurity concentrations are higher than the first impurity concentration. The film is provided above the third semiconductor layer, and blocks light to enter into a neighborhood of the third semiconductor layer.

Abstract: An optical connection device includes an optical link module that includes an optical unit having an optical element and a lead connected to the optical element, and a first member in which the optical unit is mounted, and a second member that has an aperture in which the optical link module is fit. An outside surface of the first member includes a first protruding portion, and an inside surface of the second member includes a second protruding portion which intersects and is in contact with the first protruding portion.

Abstract: According to one embodiment, an optical communication module includes an optical unit and an optical connector. The optical unit includes an optical semiconductor element and a base. The optical semiconductor element has a first optical axis. The base has a first surface and a mounting portion to mount an optical connector. The first surface is perpendicular to the first optical axis. The base is provided with the optical semiconductor element. The optical connector is mounted at the mounting portion and is capable of rotating around the first optical axis. The optical connector includes a first housing and a light-guiding body. The first housing has a second surface facing the first surface and a second axis crossing the first optical axis at a first angle. The light-guiding body is provided inside the first housing and has an end plane perpendicular to the second axis.

Abstract: According to one embodiment, a photodiode includes a first semiconductor layer of a first conductivity type, a second semiconductor layer of a second conductivity type, a third semiconductor layer of the first conductivity type, and a film. The second semiconductor layer is provided in the first semiconductor layer. The third semiconductor layer is provided in the first semiconductor layer so as to surround the second semiconductor layer. Each of one ends of the second and third semiconductor layers is located at an upper surface of the first semiconductor layer. The first to third semiconductor layers include first to third impurity concentrations respectively. The second and third impurity concentrations are higher than the first impurity concentration. The film is provided above the third semiconductor layer, and blocks light to enter into a neighborhood of the third semiconductor layer.

Abstract: An optical module includes: an optical semiconductor section including a first lead, a second lead with one end portion opposed to one end portion of the first lead, an optical semiconductor element bonded onto the first lead, and a first molded body in which the optical semiconductor element, the one end portion of the first lead, and the one end portion of the second lead are embedded; and an optical element section including a third lead, a fourth lead with one end portion opposed to one end portion of the third lead, and a second molded body in which the one end portion of the third lead and the one end portion of the fourth lead are embedded and which can change the optical path of at least one of emitted light from the optical semiconductor element and incident light on the optical semiconductor element. The other end portion of the first lead and the other end portion of the second lead protrude from the first molded body in directions opposite to each other.

Abstract: Provided is an optical communication module including: a surface emitting element configured to convert an electrical signal into an optical signal and emit the optical signal; a lens provided at a predetermined distance from the surface emitting element in a direction along the center of an optical axis of the surface emitting element so that an emission angle from the surface emitting element is 30° or lower, the lens configured to output a first optical signal and a second optical signal; a first polarizing plate provided on the center of an optical axis of the lens, and configured to polarize the first optical signal into a specific direction and pass the first optical signal there through; and a second polarizing plate provided on the center of another optical axis of the lens and adjacently to the first polarizing plate, and configured to polarize the second optical signal at a polarization angle different from that of the first optical signal by approximately 90° and pass the second optical signal ther

Abstract: An optical module includes: an optical semiconductor section including a first lead, a second lead with one end portion opposed to one end portion of the first lead, an optical semiconductor element bonded onto the first lead, and a first molded body in which the optical semiconductor element, the one end portion of the first lead, and the one end portion of the second lead are embedded; and an optical element section including a third lead, a fourth lead with one end portion opposed to one end portion of the third lead, and a second molded body in which the one end portion of the third lead and the one end portion of the fourth lead are embedded and which can change the optical path of at least one of emitted light from the optical semiconductor element and incident light on the optical semiconductor element. The other end portion of the first lead and the other end portion of the second lead protrude from the first molded body in directions opposite to each other.

Abstract: An optical link module, includes: a lead frame including at least two notches at an outer edge of its major surface; a substrate bonded to the major surface of the lead frame so that the notches are exposed therearound; an optical element having an optical axis generally perpendicular to the major surface and bonded onto the substrate using the notches as a positioning reference; and a receptacle housing being in contact with the lead frame to cover the substrate and the optical element, and including a tubular ferrule guide portion having a central axis generally in alignment with the optical axis and guide pins fitted into the notches.

Abstract: A link device for stretching a sheet material consists of pantograph-like link member units having a sub-link held substantially at a right angle to the running direction and rollers fitted to said sub-link. Due to the low running resistance of the rollers and the pantograph-like structure composed of long and short links, an endless guide-rail can be introduced in the stretching apparatus for a sheet material and the running of the chain can be stabilized, thereby resulting in a high-speed stable stretching operation. Reduction of the running resistance makes it easy to adjust the stretching ratios according to the desired stretching conditions.