Abstract: An optical waveguide includes a core extending in a transmission direction of light, a clad covering the core along the transmission direction, and a mixing layer containing a material for the core and a material for the clad on the interface between the core and the clad, and the mixing layer includes a plurality of regions each having a different thickness in the transmission direction.

Abstract: An opto-electric hybrid board includes an optical waveguide and an electric circuit board. The opto-electric hybrid board has an electrode at one end portion in a first direction perpendicular to the thickness direction, and optically and electrically connects an optical element emitting light from a space between the one end portion and the other end portion. The electric circuit board includes a terminal portion electrically connected to the electrode and a support portion that supports the other end portion. The optical waveguide includes a light receiving portion for receiving light emitted from the optical element, which is positioned between the terminal portion and the support portion, when projected in the thickness direction, and a one-side surface in the thickness direction of the terminal portion is positioned at the other side in the thickness direction with respect to a one-side surface in the thickness direction of the support portion.

Abstract: An optical waveguide member connector kit includes an optical waveguide member including an optical waveguide and a connector having an accommodation space that is capable of accommodating the optical waveguide member. When the optical waveguide member is accommodated in the accommodation space, the connector has an opening portion reaching the optical waveguide member from the outside of the connector and when the optical waveguide member is accommodated in the accommodation space, at least one of the optical waveguide member and the connector includes a groove communicating with the opening portion facing at least the other side of the optical waveguide member and the connector.

Abstract: An optical waveguide member connector kit includes an optical waveguide member including an optical waveguide and a connector having an accommodation space that is capable of accommodating the optical waveguide member. When the optical waveguide member is accommodated in the accommodation space, the connector has an opening portion reaching the optical waveguide member from the outside of the connector and when the optical waveguide member is accommodated in the accommodation space, at least one of the optical waveguide member and the connector includes a groove communicating with the opening portion facing at least the other side of the optical waveguide member and the connector.

Abstract: Opto-electric hybrid boards are disclosed including an electric circuit board; light-emitting and light-receiving elements which are mounted on a first surface of the electric circuit board; and an optical waveguide having a core for an optical path and formed in a stacked manner on a second surface of the electric circuit board. The core of the optical waveguide includes: end portions formed as light reflecting surfaces for reflecting light to allow the light to propagate between the core and the light-emitting and light-receiving elements; extensions extending from the end portion side of the core toward the light-emitting and light-receiving elements; and a main portion from which the extensions extend. The extensions of the core and the main portion of the core are different from each other in shape of cross-sections perpendicular to an axial direction thereof.

Abstract: An optical waveguide includes a core extending in a transmission direction of light, a clad covering the core along the transmission direction, and a mixing layer containing a material for the core and a material for the clad on the interface between the core and the clad, and the mixing layer includes a plurality of regions each having a different thickness in the transmission direction.

Abstract: An optical waveguide includes a first core and a second core disposed adjacent to each other at spaced intervals and a dummy core positioned between the first core and the second core. The first core and the second core transmit light in a transmission direction perpendicular to an adjacent direction. The dummy core includes a facing surface facing the first core and an opposing surface positioned at the opposite side to the first core with respect to the facing surface, and the opposing surface has an inclined surface inclining so as to go away from the first core toward the downstream side in the transmission direction.

Abstract: An optical connector member is provided, which includes an optical waveguide retaining portion provided on one of opposite sides of an optical coupling portion and having a cavity for retaining an end portion of an optical waveguide, and an optical fiber retaining portion provided on the other side and having a through-hole for retaining an end portion of an optical fiber. A distal end face of the end portion of the optical waveguide retained in the cavity of the optical waveguide retaining portion and a distal end face of the end portion of the optical fiber retained in the through-hole of the optical fiber retaining portion are positioned in opposed relation to each other in the optical coupling portion with an optical axis of the optical waveguide in alignment with an optical axis of the optical fiber.

Abstract: An optical waveguide member connector kit includes an optical waveguide member including an optical waveguide and a connector accommodating the optical waveguide member. The connector includes a main body having a bottom wall, and a first wall and a second wall that extend from the bottom wall toward one side in a thickness direction of the bottom wall and face each other at spaced intervals therebetween, and a lid disposed between the first wall and the second wall and sandwiching the optical waveguide member with the bottom wall when the optical waveguide member is accommodated in the connector. A ratio (L1/L2) of a length L1 in a facing direction of the lid to a facing length L2 between the first wall and the second wall is 0.80 or more and 0.99 or less.

Abstract: An opto-electric hybrid board includes an optical waveguide and an electric circuit board. The opto-electric hybrid board has an electrode at one end portion in a first direction perpendicular to the thickness direction, and optically and electrically connects an optical element emitting light from a space between the one end portion and the other end portion. The electric circuit board includes a terminal portion electrically connected to the electrode and a support portion that supports the other end portion. The optical waveguide includes a light receiving portion for receiving light emitted from the optical element, which is positioned between the terminal portion and the support portion, when projected in the thickness direction, and a one-side surface in the thickness direction of the terminal portion is positioned at the other side in the thickness direction with respect to a one-side surface in the thickness direction of the support portion.

Abstract: A connector member for an optical waveguide includes a housing provided with a space portion for holding an end portion of an optical waveguide. In the housing, protruding portions serving as a positioner are provided on left-hand and right-hand side wall portions defining the space portion. Notches in the optical waveguide are fitted on the protruding portions, whereby a front end surface of the end portion of the optical waveguide is positioned at a location a predetermined distance inward from a front end surface of the housing. This configuration achieves optical coupling without bringing the end surface of the optical waveguide into direct abutment with an end surface of a target optical connector.

Abstract: Opto-electric hybrid boards are disclosed including an electric circuit board; light-emitting and light-receiving elements which are mounted on a first surface of the electric circuit board; and an optical waveguide having a core for an optical path and formed in a stacked manner on a second surface of the electric circuit board. The core of the optical waveguide includes: end portions formed as light reflecting surfaces for reflecting light to allow the light to propagate between the core and the light-emitting and light-receiving elements; extensions extending from the end portion side of the core toward the light-emitting and light-receiving elements; and a main portion from which the extensions extend. The extensions of the core and the main portion of the core are different from each other in shape of cross-sections perpendicular to an axial direction thereof.

Abstract: Provided are an optical waveguide capable of propagating light, and a position sensor and an optical circuit board including the same. The optical waveguide includes cores each partially formed in an S-shape. The S-shaped portion includes a first curved portion upstream as seen in the direction of light propagation, and a second curved portion downstream as seen in the direction of light propagation and curved in a direction opposite to the first curved portion. The first curved portion and the second curved portion are connected to each other via a straight portion having a length in the range of from 0 mm to 30 mm. One of the width of the exit of the first curved portion and the width of the entrance of the second curved portion is smaller than the width of a core portion upstream of the S-shaped portion.

Abstract: A connector member for an optical waveguide includes a housing provided with a space portion for holding an end portion of an optical waveguide. In the housing, protruding portions serving as a positioner are provided on left-hand and right-hand side wall portions defining the space portion. Notches in the optical waveguide are fitted on the protruding portions, whereby a front end surface of the end portion of the optical waveguide is positioned at a location a predetermined distance inward from a front end surface of the housing. This configuration achieves optical coupling without bringing the end surface of the optical waveguide into direct abutment with an end surface of a target optical connector.

Abstract: For the purpose of providing a connector member for an optical waveguide capable of suppressing warpage and deformation of an optical waveguide and making connection with low optical connection losses and an optical connector kit using the same, a connector member for an optical waveguide includes a housing having a placing portion for placing an optical waveguide thereon, and a pair of wall portions extending upwardly from the placing portion, with the optical waveguide therebetween, wherein the wall portions are provided with respective guide pin holes for insertion of positioning guide pins therethrough, and wherein a vertical distance B between a guide pin reference line obtained by connecting the centers of the guide pin holes provided in the respective wall portions and an optical waveguide placing surface of the placing portion satisfies the following formula: 0.018 mm?B?0.045 mm.

Abstract: Provided are an optical waveguide capable of propagating light, and a position sensor and an optical circuit board including the same. The optical waveguide includes cores each partially formed in an S-shape. The S-shaped portion includes a first curved portion upstream as seen in the direction of light propagation, and a second curved portion downstream as seen in the direction of light propagation and curved in a direction opposite to the first curved portion. The first curved portion and the second curved portion are connected to each other via a straight portion having a length in the range of greater than 0 mm to 30 mm. One of the width of the exit of the first curved portion and the width of the entrance of the second curved portion is smaller than the width of a core portion upstream of the S-shaped portion.