Abstract: An image forming apparatus includes: a first image forming unit that includes a first image holding member and a first developing unit, the first developing unit accommodating a first developer that includes a first toner and a first carrier; a first transfer unit; a second image forming unit that is disposed downstream of the first image forming unit in a traveling direction of the transfer medium and includes a second image holding member and a second developing unit, the second developing unit accommodating a second developer that includes a second toner and a second carrier; and a second transfer unit, in which a volume resistivity of the first carrier is lower than a volume resistivity of the second carrier, and a volume average particle diameter of the first carrier is less than a volume average particle diameter of the second carrier.

Abstract: A lens component has a lens surface having a lens, a bottom surface facing an optical waveguide film, a first area located between the lens surface and the bottom surface, and transmitting light, and second areas provided on at least both sides of the first area. The optical waveguide film has mounting surfaces. The second areas have guide holes opened in the first end faces. The optical waveguide film has projecting parts fitted in the guide holes composed of a core layer, in the respective mounting surfaces. A height of the bottom surface to each first end face is larger than a height from each mounting surface to a surface of the optical waveguide film.

Abstract: A developer set includes a first developer and a second developer. The first developer includes a first toner and a first carrier. The second developer includes a second toner and a second carrier. The second toner is a toner that includes a flaky brilliant pigment, a toner that includes a white pigment, or a transparent toner. The second carrier has a higher volume resistivity than the first carrier and has a larger volume average particle diameter than the first carrier.

Abstract: An optical connector having a shutter is disclosed. The optical connector comprises an optical connection component configured to hold one or a plurality of optical fibers, and having a light incidence/emission end surface being movable in the connection direction with respect to the optical connection component; a second member having a shutter part that performs opening/closing of an opening, the second member being attached to the first member in a state of being rotatable around a rotation axis; a first sealing member contacting the first member over a whole circumference of the opening, the first sealing member also contacting the shutter part over the whole circumference of the opening when the shutter part is in a closed state; and a linkage mechanism that rotates the second member in conjunction with movement of the first member along the connection direction with respect to the optical connection component.

Abstract: An image forming apparatus includes: a first image forming unit that includes a first image holding member and a first developing unit, the first developing unit accommodating a first developer that includes a first toner and a first carrier; a first transfer unit; a second image forming unit that is disposed downstream of the first image forming unit in a traveling direction of a transfer medium and includes a second image holding member and a second developing unit, the second developing unit accommodating a second developer that includes a second toner and a second carrier; and a second transfer unit, in which a volume resistivity of the first carrier is higher than a volume resistivity of the second carrier, and a volume average particle diameter of the first carrier is more than a volume average particle diameter of the second carrier.

Abstract: A method for manufacturing an optical connector according to one embodiment is a method for manufacturing an optical connector having a ferrule including an end face at which an optical fiber holding hole for holding an optical fiber is opened, the method including: a step of inserting the optical fiber into the optical fiber holding hole and fixing the optical fiber to expose the optical fiber at the end face; a step of polishing the end face together with the optical fiber; and a step of heating another region excluding a region where the optical fiber is exposed at the end face to make the other region higher than the region where the optical fiber is exposed.

Abstract: An optical connector ferrule, an optical connector, and an optical coupling structure according to an embodiment includes an optical connector ferrule that includes a ferrule end face that faces a counterpart connector; and an optical fiber holding hole that is open to the ferrule end face and holds an optical fiber inserted thereinto. A normal direction of the ferrule end face is inclined with respect to a direction of an optical axis of the optical fiber in a section along the optical axis of the optical fiber inserted into and held in the optical fiber holding hole. An inclined angle (?) of the normal direction with respect to the direction of the optical axis is between 100 and 20°.

Abstract: An image forming apparatus includes: a first image forming unit that includes a first image holding member and a first developing unit, the first developing unit accommodating a first developer that includes a first toner and a first carrier; a first transfer unit; a second image forming unit that is disposed downstream of the first image forming unit in a traveling direction of the transfer medium and includes a second image holding member and a second developing unit, the second developing unit accommodating a second developer that includes a second toner and a second carrier; and a second transfer unit, in which a volume resistivity of the first carrier is lower than a volume resistivity of the second carrier, and a volume average particle diameter of the first carrier is less than a volume average particle diameter of the second carrier.

Abstract: An image forming apparatus includes: a first image forming unit that includes a first image holding member and a first developing unit, the first developing unit accommodating a first developer that includes a first toner and a first carrier; a first transfer unit; a second image forming unit that is disposed downstream of the first image forming unit in a traveling direction of a transfer medium and includes a second image holding member and a second developing unit, the second developing unit accommodating a second developer that includes a second toner and a second carrier; and a second transfer unit, in which a volume resistivity of the first carrier is higher than a volume resistivity of the second carrier, and a volume average particle diameter of the first carrier is more than a volume average particle diameter of the second carrier.

Abstract: An optical connector ferrule according to an embodiment includes: holding holes into which optical waveguiding members, each of which has a GRIN lens, an optical fiber, and a fusion part that connects the GRIN lens and the optical fiber, are inserted; a ferrule end face at which the holding holes open and which faces a counterpart connector; and stepped parts with which the fusion parts of the optical waveguiding members inserted into the holding holes are aligned.

Abstract: An optical connector ferrule includes optical fiber holding hole holding an inserted optical fiber, a ferrule end face facing a coupled-side optical connector ferrule, a lens structure provided on an axis line of the optical fiber holding hole on the ferrule end face, and an inspection hole formed along the optical fiber holding hole. The ferrule end face is flat on at least an axis line of the inspection hole, and refractive-index distribution in an area between the ferrule end face and a back side thereof is uniform.

Abstract: An optical connector ferrule comprises a body and a spacer. The body has a flat ferrule end surface facing a corresponding optical connector, and an optical fiber retaining hole opened in the ferrule end surface, an optical fiber being inserted and retained in the optical fiber retaining hole. The spacer is joined to the body, and at least a portion of the spacer is disposed on the ferrule end surface. The spacer defines an interval between the ferrule end surface and the corresponding optical connector, and includes an opening that allows an optical path extending from the optical fiber to pass therethrough.

Abstract: A connector structure of an OCT catheter includes an outer casing that has an inner space extending in an axial direction and that has an opening at one end in the axial direction, a connector that is disposed in the inner space so as to be rotatable around the axis in a state in which a connection end is oriented toward the opening, and a stopper that is disposed in the inner space and that restricts rotation of the connector relative to the outer casing. When a part of the outer casing including the one end is pushed into a connection port of a rotational driving device that performs rotational driving, the connector is connectable to an adapter of the rotational driving device; and, when the outer casing is pushed into the connection port, restriction on rotation of the connector by the stopper is removed.

Abstract: An electrostatic charge image developer includes a brilliant toner that includes a toner particle having an average equivalent circle diameter D longer than an average maximum thickness C and a carrier that includes a core particle and a coating layer which covers a surface of the core particle, wherein the coating layer contains a resin and a surfactant, and a content of the surfactant is in a range of 50 ppm to 200 ppm with respect to the entire weight of the carrier.

Abstract: An OCT catheter includes an interior member including a torque wire and an optical fiber, the torque wire transmitting rotation from a proximal end toward a distal end, the optical fiber being provided in a hollow portion of the torque wire and transmitting light. The OCT catheter further includes an outer housing 30 covering the interior member. The outer housing includes inside a pair of stepped portions that face each other in a lengthwise direction of the torque wire. The torque wire includes a torque-wire body and a flange provided on the torque-wire body. The flange is provided between the pair of stepped portions. A coil spring is provided between one of the pair of stepped portions and the flange. The flange is pressed toward the other of the pair of stepped portions by the coil spring.

Abstract: An electrostatic charge image developer includes a toner that includes a toner particle; and a carrier, wherein the toner particle contains a brilliant pigment, an exposed amount of the brilliant pigment contained in the toner particle is from 0.5% to 5%, the carrier has a core particle and a coating layer which covers a surface of the core particle, the coating layer contains a silicone resin and a siloxane oligomer, and a content of the siloxane oligomer is from 0.1 ppm to 500 ppm with respect to a total weight of the coating layer.

Abstract: A receptacle connector comprises a receptacle ferrule, and a receptacle housing including a cavity housing the receptacle ferrule and a cavity housing a plug connector. The receptacle ferrule includes an optical coupling surface (front surface). An opening area of the cavity on a cross section vertical to an inserting direction of the plug connector to the receptacle housing is smaller than an opening area of the cavity on the cross section vertical to the inserting direction. In a second state after being optically coupled, the optical coupling surface (front surface) is positioned inside the cavity.

Abstract: An electrostatic charge image developer includes a toner that includes a toner particle; and a carrier, wherein the toner particle contains a brilliant pigment, an exposed amount of the brilliant pigment contained in the toner particle is from 0.5% to 5%, the carrier has a core particle and a coating layer which covers a surface of the core particle, the coating layer contains a silicone resin and a siloxane oligomer, and a content of the siloxane oligomer is from 0.1 ppm to 500 ppm with respect to a total weight of the coating layer.

Abstract: An electrostatic charge image developer includes a brilliant toner that includes a toner particle having an average equivalent circle diameter D longer than an average maximum thickness C and a carrier that includes a core particle and a coating layer which covers a surface of the core particle, wherein the coating layer contains a resin and a surfactant, and a content of the surfactant is in a range of 50 ppm to 200 ppm with respect to the entire weight of the carrier.

Abstract: The ferrule has a rear end and a front end, an opening that is formed in the rear end and communicates with fiber holding holes holding the optical fibers formed from the rear end toward the front end, and first connection parts which are formed at the front end and to which the lens array is connected. The lens array has a rear face and a surface including an outgoing plane, lenses receiving the light from the optical fibers, and second connection parts connected to the first connection parts, the lenses and the second connection parts being formed on the rear face, and a flat face from which the light from the optical fibers is emitted, and third connection parts connected to an opposite connector, the flat face and the second connection parts being formed on the surface.