Abstract: When a surface of a filter member on a multilayer film is defined as a first surface, a surface of the filter member on an quartz substrate as a second surface, an inner wall surface of a slit which faces the first surface of the filter member as a first inner wall surface, and an inner wall surface of the slit which faces the second surface of the filter member as a second inner wall surface, one or more of the first inner wall surface and the second inner wall surface of the slit, and the second surface of the filter member do not lie parallel to the first surface of the filter member.

Abstract: An optical device includes an optical fiber having a core and a cladding, a slit extending from the upper surface of the optical fiber into a glass substrate, a filter member inserted in the slit, and a PD array for detecting divided light. A first high-polymer gel material fills a gap between the slit and a filter member within the slit. A second high-polymer gel material is interposed between an optical fiber array and the PD array and disposed on an optical path of the light divided by the filter member.

Abstract: A two-dimensional optical element array is provided, including a two-dimensional integrated body or two-dimensional stack of a plurality of sets of an optical fiber and a substrate. The substrate has one or more grooves each suited to a profile of the optical fiber on one surface thereof, and one or more optical fibers are aligned and fixed in the grooves. An end face of the substrate and optical fiber from which light is outgoing or incoming is slanted by a predetermined angle (?) with respect to a plane perpendicular to a central axis of the optical fiber.

Abstract: An optical device comprising a first substrate in which V-grooves are made, four optical fibers, for example, having a reflective function and fixed in the V-grooves of the first substrate, an optical element bonded, through an adhesive layer, onto the optical path of a reflected light at least generated by the reflective function on the outside of the clad of each optical fiber, and a second substrate for mounting the optical element, wherein the second substrate is disposed such that the mounting surface of the optical element faces the first substrate.

Abstract: To provide a method of manufacturing a two-dimensional optical connector component by stacking a plural number of one-dimensional optical connector components using at least four parallel disposed guide pins. The positions of the guide pins are determined by at least five pieces of beams. According to this method of manufacturing a two-dimensional optical connector component, optical connector components, such as an FA, can be stacked with high precision. There is also provided a guide pin jig usable for the above-mentioned manufacturing method. The jig is provided with at least four pieces of parallel disposed guide pins, and at least five pieces of beams for determining the position of the guide pins.

Abstract: A two-dimensional optical element array with a high alignment precision of optical elements on a substrate and a high long-term reliability is provided. A two-dimensional optical fiber array includes a stacked plurality of optical fiber array units each having an optical fiber and a substrates, the substrate having one or more grooves each suited to a profile of the optical fiber on one of surfaces thereof, and one or more optical fibers being aligned and fixed in grooves, and is characterized in that optical fiber array units are stacked in a state such that surfaces of the substrates among adjacent two units out of the plurality of array units that face each other do not directly contact each other, and the adjacent two units do not have a direct mechanical influence on each other.

Abstract: The optical fiber array by which the optical device was fixed to V grooves of the glass substrate with which V grooves was formed, and this glass substrate, and reflective functions (a slit, optical tapping member, etc.

Abstract: An optical fiber, which is provided in each of channels of an optical fiber array disposed on V-grooves, has a portion (reflecting section) at which a core is cut out at an intermediate position of the optical fiber. The reflected light, which is split from a signal light transmitted in the core of the optical fiber on the basis of a refractive index difference at the reflecting section, is obtained through a index matching layer provided outside a clad of the optical fiber. The reflected light is monitored by a photodetector of a photodetecting array.

Abstract: A SiO2—Al2O3—Li2O component-based glass material, which comprises, as basic components, SiO2: 60-63 wt %; Al2O3: 23-25 wt %; and Li2O: 4-5 wt % and, as modifying components, ZrO2: 1.5-2.5 wt %; TiO2: 0.5-2.5 wt %; MgO: 0.5-1.5 wt %; ZnO: 0.5-1.2 wt %; Na2O: 0.5-2.0 wt %; and K2O: 0.5-2.0 wt %, and further comprises any one of BaO: 0.5-1.0 wt, CaO: 1.0-2.0 wt %, and B2O3: 0.01-1.0 wt %. This can be reheat-formed in a glass state and has a low thermal expansion coefficient.

Abstract: There are provided a glass substrate for mounting optical parts capable of mounting a plurality of optical parts having different diameters by positioning the optical parts precisely, comprising: a groove for securing a first optical part having a relatively small diameter among a plurality of optical parts, V-shaped grooves formed on either side of the groove for securing a first optical part, and a groove for securing a second optical part formed so that outer tapered sections of the V-shaped grooves become outer grooves for securing an optical part having a relatively large diameter among a plurality of optical parts; a method for producing the same, and an assembly using the substrate.

Abstract: There are provided a two-dimensional optical element array capable of maintaining superior reflection characteristics for a long period and preventing a loss of quantity of light and an adverse effect to another device, and a two-dimensional waveguide apparatus having high density and capacity and allowing the number of steps in packaging or connection to be reduced; the array having a two-dimensional integrated body or two-dimensional stack of a plurality of sets of an optical fiber and a substrate; the substrate has one or more grooves each suited to a profile of the optical fiber on one of surfaces thereof, and one or more optical fibers are aligned and fixed in the grooves. An end face from which light is outgoing or incoming of the substrate and optical fiber is slanted by a predetermined angle (&thgr;) with respect to a plane perpendicular to a central axis of the optical fiber.

Abstract: An optical fiber array of the present invention is one having an upper substrate, a lower substrate having V grooves formed on the upper side and having planar surfaces on opposite sides in a direction perpendicular to the longitudinal direction of the V grooves, and optical fibers, inserted and disposed in the V grooves, sandwiched between the upper substrate and the lower substrate. And it has a characteristic that the planar surfaces on opposite sides of the lower substrate are formed at a position lower than the upper side of the lower substrate or the top of the V grooves. This optical fiber array provides sufficient bonding reliability between constituent members, has good adhesion to other optical components, does not apply excessive stress to the optical fibers, and enables highly precise arrangement of the optical fibers.

Abstract: A two-dimensional optical element array with a high alignment precision of optical elements on a substrate and a high long-term reliability is provided. A two-dimensional optical fiber array 10 includes a stacked plurality of optical fiber array units 5 each having an optical fiber 1 and a substrate 2, the substrate 2 having one or more grooves 21 each suited to a profile of the optical fiber 1 on one of surfaces thereof, and one or more optical fibers 1 being aligned and fixed in grooves 21, and is characterized in that optical fiber array units 5 are stacked in a state that surfaces facing each other of substrates 2 among adjacent two units out of said plurality array units 5 are not contacted directly, and that said adjacent two units do not give a direct mechanical influence each other.

Abstract: To provide a method of manufacturing a two-dimensional optical connector component by stacking a plural number of one-dimensional optical connector components using at least four parallel disposed guide pins. The positions of said guide pins are determined by at least five pieces of beams. According to this method of manufacturing a two-dimensional optical connector component, optical connector components, such as an FA, can be stacked with high precision. There is also provided with a guide pin jig usable for the above-mentioned manufacturing method, and said jig is provided with at least four pieces of parallel disposed guide pins, and at least five pieces of beams for determining the position of said guide pins.

Abstract: This invention is directed to a mold for molding a substrate comprising upper and lower mold parts, said mold being provided with one or more guide grooves in a predetermined position within the opposing internal surfaces of the upper and lower mold parts to receive one or more guide members, and being interposed between the internal surfaces at the predetermined position to maintain the vertical and horizontal alignment positions constant. A substrate having a pattern corresponding to the predetermined patterns with high precision in vertical and horizontal positions on both upper and lower sides thereof is molded by pressing simultaneously one or more of the guide members received in the guide grooves and the molding material charged in a space defined by the opposing internal surfaces.

Abstract: There are provided a glass substrate for mounting optical parts capable of mounting a plurality of optical parts having different diameters by positioning the optical parts precisely, comprising:

Abstract: A glass-forming mold comprising an intermediate layer 2 and a platinum layer 3 is provided. The intermediate layer 2 of thickness 3 &mgr;m which is formed from an alloy comprising 40 wt % of platinum and 60 wt % of iridium is provided over the surface of a mold substrate 1. This substrate is formed from a cemented carbide material having tungsten carbide as principal constituent. The platinum layer 3 of thickness 0.05 &mgr;m is furthermore provided over the intermediate layer 2. By applying the above process, a surface roughness within the range 0.01 &mgr;m to 0.05 &mgr;m is provided to the mold substrate and a surface roughness within the range 0.2 &mgr;m to 1.2 &mgr;m is provided to the platinum layer 3 which corresponds to the surface S1 of the most external layer. The surface roughness of the platinum may be achieved by using sputtering to deposit a platinum film and thereafter promoting platinum grain growth by heat treatment at 500° C. for 1 hr in a nitrogen atmosphere.

Abstract: A SiO2-Al2O3-Li2O component-based glass material, which comprises, as basic components, SiO2: 60-63 wt %; Al2O3: 23-25 wt %; and Li2O: 4-5 wt % and, as modifying components, ZrO2: 1.5-2.5 wt %; TiO2: 0.5-2.5 wt %; MgO: 0.5-1.5 wt %; ZnO: 0.5-1.2 wt %; Na2O: 0.5-2.0 wt %; and K2O: 0.5-2.0 wt %, and further comprises any one of BaO: 0.5-1.0 wt, CaO: 1.0-2.0 wt %, and B2O3: 0.01-1.0 wt %. This can be reheat-formed in a glass state and has a low thermal expansion coefficient.

Abstract: A fluid-filled elastic mount including an elastic body elastically connecting first and second mounting members and partially defining a pressure-receiving chamber filled with a fluid, a flexible diaphragm partially defining an equilibrium chamber filled with the fluid and displaceable to permit a volume change of the equilibrium chamber, a first orifice passage for fluid communication between the two chambers, a movable member disposed between the two chambers and displaceable or deformable to permit relative volume changes of the two chambers, a second and a third orifice passage formed between the movable member and one of the two chambers for permitting the fluid to flow therethrough based on displacement or deformation of the movable member.

Abstract: A fluid-filled elastic mount including an elastic body elastically connecting a first and a second support, and partially defining a fluid chamber filled with a non-compressible fluid. The elastic mount includes an oscillating plate which partially defines the fluid chamber and which is displaceable to change a pressure of the fluid in the fluid chamber, and a permanent magnet disposed on one of opposite sides of the oscillating plate remote from the fluid chamber. A first and a second yoke member are connected to opposite magnetic pole faces of the magnet by a plastic material, and cooperate with the magnet to define a closed magnetic circuit. The yoke members define therebetween an annular gap in the magnetic circuit, in which a magnetic fluid and an annular moving coil are received. The magnetic fluid includes magnetic particles dispersed in a liquid medium. The coil is fixed to the oscillating plate, to oscillate the oscillating plate upon energization of the coil.