Abstract: An optical connector adapter allowing a stopper member to be arranged at ends of an insertion hole while being overlaid on a shutter member is provided. In the optical connector adapter, a first base plate of the shutter member is fitted into a bottom wall recess, a second base plate of the stopper member is fitted into the bottom wall recess while being overlaid on the first base plate of the shutter member, first both side plates of the shutter member are fitted into a sidewall recess, and the second both side plates of the stopper member are fitted into the sidewall recess while being overlaid on the first both side plates of the shutter member.

Abstract: An optical connector plug incorporates a coil spring to bias a shutter holding member to the front side of an axial direction with respect to a plug frame and minimizes the entire length. The plug has a housing that includes a grip member and a shutter holding member that move relatively in the axial direction and the plug frame has an extension state in which the grip member moves to the rear side of the axial direction of the shutter holding member and a reduction state in which the grip member moves to the front side of the axial direction of the shutter holding member. A biasing member that biases the shutter holding member to the front side of the axial direction with respect to the plug frame and a biasing member receiving member that is connected to the plug frame are provided.

Abstract: A junction type compound lens using glass and resin is used. By properly controlling the difference between refractive indices and the difference between Abbe numbers of the resin and glass, interface reflection that occurs when a ray with a large incidence angle is incident is restricted, and generation of a flare or a ghost image is restricted. Further, by properly controlling the difference in refractive index and the difference in Abbe number, various aberrations, such as spherical aberration, field curvature, and chromatic aberration, which may deteriorate optical performance, can be corrected. Thus, a small and high-performance imaging lens can be provided.

Abstract: To provide an optical fiber cord with an optical connector of higher flexibility resistance, and the method for manufacturing the same are disclosed. An optical fiber cord with an optical connector, wherein said fiber cord, wherein said the optical connector comprising a stop ring having a through hole formed therein, though which said optical fiber is disposed; a crimping ring being disposed around said optical fiber to crimp said stop ring and said optical fiber cord; a ferrule being disposed at the tip end part of said optical fiber in said optical fiber cord; a spring being disposed around said optical fiber and between said ferrule and said stop ring; a plug frame being engaged with said stop ring; a grip being engaged with said plug frame; wherein said through hole of said stop ring having a stepwisely narrowing part in which a hole diameter is gradually reduced from said crimping part side to said ferrule side.

Abstract: An optical connector adapter with shutter having a fewer number of parts and a shutter member that can easily be produced is provided. The shutter member of the optical connector adapter with shutter includes a base plate, both side plates, a connecting plate, and an elastically deformable shutter plate having a predetermined curvature radius. In the adapter, the base plate of the shutter member is fitted into a bottom recess formed on an external surface of a bottom wall and the both side plates of the shutter member are fitted into both side recesses formed on the external surface of both sidewalls. The shutter plate of the shutter member is positioned at both open ends of an insertion hole to shield the insertion hole while being curved to form a convex shape toward a center portion of the insertion hole and, when a optical connector plug is inserted into the insertion hole, falls toward the center portion of the insertion hole by being pressed by the optical connector plug.

Abstract: An optical connector plug incorporates a coil spring to bias a shutter holding member to the front side of an axial direction with respect to a plug frame and minimizes the entire length. The plug has a housing that includes a grip member and a shutter holding member that move relatively in the axial direction and the plug frame has an extension state in which the grip member moves to the rear side of the axial direction of the shutter holding member and a reduction state in which the grip member moves to the front side of the axial direction of the shutter holding member. A biasing member that biases the shutter holding member to the front side of the axial direction with respect to the plug frame and a biasing member receiving member that is connected to the plug frame are provided.

Abstract: Disclosed is an optical connector plug that can be securely attached to or detached from a shutter member without damage, regardless of a state of a coupling claw of an optical connector adaptor or existence or non-existence of the coupling claw. In the optical connector plug, a front end of the shutter member can move between a shield position to shield a front end face of a ferrule in an extension state and a non-shield position to expose the front end face of the ferrule to the front side of a housing in a reduction state, when a plug frame and a shutter holding member move between the extension state and the reduction state. In the optical connector plug, in a course in which the shutter holding member is engaged with holding portions protruding in an axial direction of the optical connector adaptor and a grip member moves from the extension state to the reduction state, the front end of the shutter member is spaced to face front ends of the holding portions in the axial direction.

Abstract: An optical connector adapter allowing a stopper member to be arranged at ends of an insertion hole while being overlaid on a shutter member is provided. In the optical connector adapter, a first base plate of the shutter member is fitted into a bottom wall recess, a second base plate of the stopper member is fitted into the bottom wall recess while being overlaid on the first base plate of the shutter member, first both side plates of the shutter member are fitted into a sidewall recess, and the second both side plates of the stopper member are fitted into the sidewall recess while being overlaid on the first both side plates of the shutter member.

Abstract: The present disclosure relates generally to an optical connector kit including parts constituting an optical connector. Certain embodiments relate to an optical connector kit having an optical fiber with a ferrule, a plurality of connector units, and a storage case including an upper and lower housing.

Abstract: An optical fiber connector cleaner (1) comprises a housing (10), a winding means (32) and a delivery means (34) for a cleaning tape (T) which are disposed in the housing, a cleaning means (20) having a bar-like cleaning section (21) projecting outwardly of the housing, on the front-end of the cleaning section the cleaning tape delivered from the delivery means being movably mounted under tension in an exposed state, the front-end of the cleaning section being brought into contact with the end surface of an optical fiber connector to thereby clean the end surface, a cleaning section rotating means (23) coaxially connected to the cleaning section in the housing and rotatably supported with respect to the housing; and a transmission means (40) which rotates the winding means and the cleaning section rotating means substantially simultaneously in a predetermined direction through a predetermined angle and then reverses the cleaning section rotating means to its original position.

Abstract: Provided are a non-reciprocal unit used for a polarization dependent type optical isolator and a polarization dependent type optical isolator that are simple in structure, can prevent damages due to light and heat and can obtain a high extinction ratio. In a polarization dependent type optical isolator, an input side lens (first lens) (5), a first birefringence unit (7), a Faraday rotator (9), a second birefringence unit (11) and an output side lens (second lens) (15) are arranged from the input side to the output side. The polarization dependent type optical isolator (1) is connected with optical fibers (3, 17) on the input and output sides, respectively, wherein a wedge angle (?1) of the first birefringence unit (7) is different from a wedge angle (?2) of the second birefringence unit (11).

Abstract: To provide an optical connector kit in which all connector parts contained in a containing case, wherein said connector parts includes a ferrule equipped with an optical fiber employed, in which a short length optical fiber is fixed to the ferrule and the ferrule is subjected to polishing at the terminal end thereof in advance. The optical connector kit, wherein said kit comprises a ferrule with an optical fiber comprising a short length optical fiber which has been fixed to the ferrule in advance, in which the ferrule is subjected to polishing treatment at the terminal surface thereof; a plurality of connector parts which are passed through said optical fiber before the rear end of said short length optical fiber and the front end of another optical fiber are subjected to fusion splice each other; and a containing case for receiving all connector parts constructing an optical connector including said ferrule with the optical fiber and said passing parts.

Abstract: An electro-optic modulator includes a substrate made of a material which has an electro-optic effect and a pyroelectric effect. In the substrate, an optical waveguide is formed to have at least a pair of optical paths. On the substrate and on the optical waveguide, a transparent buffer layer is formed to cover the optical waveguide. On the buffer layer, first and second electrodes are formed so that the first and the second electrodes are arranged to cause refractive index changes in the pair of optical paths in response to electrical fields surrounding the electro-optic modulator. The buffer layer is a mutual diffusion layer. The mutual diffusion layer is made from laminated films having at least one transparent insulator film and at least one transparent conductor film but has no clear boundary between the transparent insulator film and the transparent conductor film.

Abstract: To provide an optical fiber cord with an optical connector of higher flexibility resistance, and the method for manufacturing the same are disclosed. An optical fiber cord with an optical connector, wherein said fiber cord, wherein said the optical connector comprising a stop ring having a through hole formed therein, though which said optical fiber is disposed; a crimping ring being disposed around said optical fiber to crimp said stop ring and said optical fiber cord; a ferrule being disposed at the tip end part of said optical fiber in said optical fiber cord; a spring being disposed around said optical fiber and between said ferrule and said stop ring; a plug frame being engaged with said stop ring; a grip being engaged with said plug frame; wherein said through hole of said stop ring having a stepwisely narrowing part in which a hole diameter is gradually reduced from said crimping part side to said ferrule side.

Abstract: Certain embodiments provide a bipolar plate for a fuel cell having a novel configuration in which the draining function is improved, the operation is simplified, the resin contained therein is prevented from being decomposed and eluted, and methods for producing the same.

Abstract: There is provided a holder for an optical fiber ferrule end face grinding apparatus that can make good use of a grinding film, in which the number of optical fiber ferrules held by the holder is greatly increased. The holder includes a holder plate including a plurality of insertion holes into which each of the ferrules is inserted. In the holder plate, the insertion holes are arranged in an area of a certain size extending from the center to the periphery thereof.

Abstract: A biosensor capable of detecting, for example, the index of refraction, the concentration of proteins, or antibody-antigen reactions in a sample using surface plasmon resonance are provided, as well as methods for producing the biosensor sensor measurement systems using the biosensor. A biosensor may comprise transparent rod 2; metallic reflector 40 formed on end surface 2a of one end of transparent rod 2; metallic thin film 3 formed on the outer circumferential surface of said one end of transparent rod 2; and organic substance layer 4 comprising a photo immobilizing agent containing a photo cross linking agent and a substance to be immobilized which is formed on the metallic thin film 3 on the outer circumferential surface and immobilized.