Abstract: Space usable in various usages is ensured between a board and a communication module mounted on the board. A communication module is mounted on a motherboard inside a signal transmission device, and the communication module includes: a module frame having a lower plate and an upper plate facing each other and that contains a module board between the lower plate and the upper plate; and a male connector that is protruded from the lower plate and connected to a female connector provided in the motherboard. When the male connector is connected to the female connector, a gap is formed between the lower plate of the module frame and the motherboard.

Abstract: A radioactive ray detecting apparatus provides for reduction of the dead area or region where radioactive rays cannot be detected, even if disposing the radioactive ray detectors to be dense or crowded. The radioactive ray detecting apparatus satisfies the following relationships, when assuming that distance between semiconductor elements is “XG1”, while the distance from the semiconductor element of one of the radioactive ray detectors up to the semiconductor element of other radioactive ray detectors is “XG2”, and distance between the semiconductor elements alighted in a Y-direction is “YG1”, and a horizontal pitch of a predetermined pixel pitch to be used as the radioactive ray detector is “a” and a vertical pitch thereof is “b”, width of a surface of each of plural numbers of semiconductor elements is “c” and length thereof is “d”, respectively: c=a?(XG1+XG2)/2 d=b?YG1=2e+(n?2)f.

Abstract: A flexible flat optical cable includes two flexible base sheets, one or more optical fiber core wires arranged between the base sheets and each comprising at least an optical fiber, and an adhesive layer provided between the base sheets to bond the base sheets. A non-adhesive region is formed on a surface of the base sheets or the adhesive layer adjacent, in a thickness direction of the base sheets, to at least a portion of the optical fiber core wires for allowing a portion of the optical fiber core wires to move in a direction intersecting with an axial direction of the optical fiber core wires.

Abstract: A radioactive ray detecting apparatus for enabling to reduce the dead area or region where the radioactive rays cannot be detected, even if disposing the radioactive ray detectors to be dense or crowded, is provided.

Abstract: A flexible flat optical cable includes two flexible base sheets, one or more optical fiber core wires arranged between the base sheets and each comprising at least an optical fiber, and an adhesive layer provided between the base sheets to bond the base sheets. A non-adhesive region is formed on a surface of the base sheets or the adhesive layer adjacent, in a thickness direction of the base sheets, to at least a portion of the optical fiber core wires for allowing a portion of the optical fiber core wires to move in a direction intersecting with an axial direction of the optical fiber core wires.

Abstract: An optical fiber tape unit comprising an optical fiber core having an outer diameter of 0.4 mm or more consisting of an optical fiber strand composed of an optical fiber, a primary coating layer and a secondary coating layer, and an overcoat layer formed around the outer circumference of the optical fiber strand, and a member for coupling a plurality of optical fiber cores arranged in parallel. Assuming that the overcoat layer has a Young's modulus E1 and a cross-sectional area A1 and the coupling member has a Young's modulus E2 and a cross-sectional area A2, following relations are satisfied: E1?E2 and E1 A1?E2 A2.

Abstract: An optical fiber tape unit comprising an optical fiber core having an outer diameter of 0.4 mm or more consisting of an optical fiber strand composed of an optical fiber, a primary coating layer and a secondary coating layer, and an overcoat layer formed around the outer circumference of the optical fiber strand, and a member for coupling a plurality of optical fiber cores arranged in parallel. Assuming that the overcoat layer has a Young's modulus E1, a cross-sectional area A1, a tensile strength TS1 and a tensile elongation TE1 and the coupling member has a Young's modulus E2, a cross-sectional area A2, a tensile strength TS2 and a tensile elongation TE2, following relations are satisfied: following relations are satisfied: E1·A1?E2·A2, TS1?TS2, TE1?TE2, E1?100 (MPa), 20?E2?300 (MPa), TS1?10 (MPa), TS2?40 (MPa), TE1?30(%), and TE2?40(%).