Abstract: The optical receptacle of the invention includes plural first optical surfaces al lowing light emitted from plural light emitting elements to be incident thereon, plural second optical surfaces emitting the light incident on the first optical surfaces toward plural optical transmission members, and a third optical surface reflecting the light incident on the first optical surfaces toward the second optical surfaces. The distances between the center of the first optical surface and the light-emitting surface of the light emitting element and between the center of the second optical surface and the light-emitting surface of the light emitting element is longer toward the center from both ends of the row. The center-to-center distances of the first optical surfaces and of the second optical surfaces are shorter, respectively, than the distance between optical axes of light emitted from the light emitting elements and the center-to-center distance of light-receiving surfaces of optical transmission members.

Abstract: This optical receptacle has first optical surfaces via which light outputted by respective light-emitting elements is inputted, a second optical surface whereby light inputted via said first optical surfaces is outputted towards an end face of a light-transporting body, a third optical surface whereby light inputted via the first optical surfaces is reflected towards the second optical surface, a plurality of first concavities formed in the surface where the second optical surface is located, and a plurality of second concavities formed in the surface where the first optical surfaces are located or a surface opposite the surface where the first concavities are located. The first concavities and the second concavities are laid out opposite each other so that the central axes thereof coincide.

Abstract: An optical receptacle has a configuration wherein light of a light-emitting element is separated into a coupling light and a monitor light by a coupling lens face portion and a monitor lens face portion of a first lens face. The coupling light is reflected by a first reflective surface and then emitted towards an optical transmission body from a coupling light emission surface. The monitor light is reflected by a second reflective surface and then emitted towards a light-receiving surface from a monitor light emission surface.

Abstract: The method of the present invention is capable of polishing a high hardness work at high polishing efficiency. The method comprises the steps of: pressing a surface of the work onto a polishing part of a rotating polishing plate; and supplying slurry while performing the pressing step. The method is characterized in that an activated gas, which has been activated by gas discharge, is turned into bubbles and mixed into the slurry.

Abstract: This light receptacle comprises: first optical surfaces on which light beams emitted from light emitting elements are respectively caused to be incident; second optical surfaces which emit the light beams incident on first optical surfaces respectively toward the end faces of light transmission bodies; a third optical surface which reflects the light beams incident on the first optical surfaces toward the second optical surfaces; and recesses which are formed in the surface on which second optical surfaces are arranged. The distance between the centers of two adjacent first optical surfaces before mold release and the distance between the centers of two adjacent second optical surfaces before mold release during injection molding are shorter than the distance between the optical axes of light beams emitted from two adjacent light emitting elements that are arranged so as to face each other.

Abstract: A surface (17d?) facing a photoelectric conversion apparatus is formed on the optical block (3) side, said surface having light from a light emitting element (10) inputted thereto and monitor light outputted therefrom, and a coupling light output surface (12) having coupling light outputted therefrom is formed on the optical housing (4) side, and consequently, the surface (17d?) and the coupling light output surface (12) are simply and highly accurately formed. Then, an optical block (3) and an optical housing (4) are simply and accurately combined by being fitted together by means of fitting sections (21, 24). Adhesion of foreign materials and formation of scratches on the reflecting surface (18) of the optical block (3) are suppressed by covering the reflecting surface (18) with the optical housing (4).

Abstract: In an exemplary configuration, a lens array and a light module using the same include a first lens surface 11 and a second lens surface 12 formed into surface shapes such that by expanding the luminous flux diameter of light as the light travels from the first lens surface 11 toward the second lens surface 12, a light spot on the second lens surface 12 is larger in diameter than a light spot on the first lens surface 11, whereby the effects on optical performance by foreign objects and scratches on the lens surface can be mitigated, the criteria for the outward appearance of the lens surface can therefore be mitigated and the yield rate improved, and costs can be reduced.

Abstract: The method of the present invention is capable of polishing a high hardness work at high polishing efficiency. The method comprises the steps of: pressing a surface of the work onto a polishing part of a rotating polishing plate; and supplying slurry while performing the pressing step. The method is characterized in that an activated gas, which has been activated by gas discharge, is turned into bubbles and mixed into the slurry.

Abstract: An optical fiber attaching section, a photoelectric conversion device attaching section, and a lens are integrally formed by a light-transmitting resin material. The optical fiber attaching section is formed concentrically with an optical axis OA of the lens. A contact surface for the photoelectric conversion device in the photoelectric conversion device attaching section is formed having a tilt in relation to a plane that is perpendicular to the optical axis OA. As the photoelectric conversion device, a photoelectric conversion device is attached in which a contact surface for the photoelectric conversion device attaching section is formed in parallel with a light-receiving surface of a light-receiving element.

Abstract: An optical receptacle includes an optical fiber attaching section, a photoelectric conversion device, and a lens, the lens includes a first face that faces an end portion of an optical fiber and is composed of a concave face that recesses towards a light-receiving element side, and a second face that faces the light-receiving element and is composed of a convex face that projects towards the light-receiving element side, and as a result of the combination of the concave face and the convex face, is formed such that outgoing light from the optical fiber that is attached at an angle to an optical axis of the lens is collected in an appropriate area of the light-emitting element.

Abstract: An optical receptacle includes a cylindrical optical fiber attaching section for attaching an end portion of an optical fiber by insertion; a cylindrical photoelectric conversion device attaching section that includes an inner circumferential surface into which a photoelectric conversion device having a light-receiving element is inserted and for attaching the photoelectric conversion device with an adhesive that is interposed within an annular adhesion space; and a lens for optically coupling the end portion of the optical fiber and the light-emitting element, and the lens is a Fresnel lens in which a second face that faces the light-receiving element includes a convex face.

Abstract: A lens array satisfies a+b+d1+e+?L?W1 where: a: positional accuracy of first lens faces 11, b: positional accuracy of second lens faces 12, d1: positional accuracy of light-emitting elements 7, e: positional accuracy of optical fibers 5, ?L=?×?T×L (?: coefficient of linear expansion of lens array main body 4; ?T: temperature change in the lens array main body 4; and L: distance from a fixed position on a first surface 4a to a position of a lens face on the first surface 4a farthest from the fixed position), W1: a distance between attachment positions before and after movement, under a premise that a photovoltaic device 3 is moved from an attachment position at which optical coupling efficiency between the light-emitting elements 7 and fiber ends 5a indicates a maximum efficiency to an attachment position at which efficiency reduction equivalent to 2 dB is indicated.

Abstract: A surface (17d?) facing a photoelectric conversion apparatus is formed on the optical block (3) side, said surface having light from a light emitting element (10) inputted thereto and monitor light outputted therefrom, and a coupling light output surface (12) having coupling light outputted therefrom is formed on the optical housing (4) side, and consequently, the surface (17d?) and the coupling light output surface (12) are simply and highly accurately formed. Then, an optical block (3) and an optical housing (4) are simply and accurately combined by being fitted together by means of fitting sections (21, 24). Adhesion of foreign materials and formation of scratches on the reflecting surface (18) of the optical block (3) are suppressed by covering the reflecting surface (18) with the optical housing (4).

Abstract: As a result of a fourth surface being a surface on a gate side, a merging position of a molten resin material during molding of a lens array main body is placed away from formation positions of lens faces, and as a result of the three dimensional shape of a third recessing section, during molding of the lens array main body, the flow of molten resin material from a surface side that opposes the fourth surface into a flow path corresponding with an area between a first recessing section and a second recessing section can be suppressed.

Abstract: The method of the present invention is capable of polishing a high hardness work at high polishing efficiency. The method comprises the steps of: pressing a surface of the work onto a polishing part of a rotating polishing plate; and supplying slurry while performing the pressing step. The method is characterized in that an activated gas, which has been activated by gas discharge, is turned into bubbles and mixed into the slurry.

Abstract: A surface (3a?) having light of a light emitting element (10) inputted thereto and monitor light outputted therefrom is formed as a part of an optical plate (3), and an output surface (12) having coupling light outputted therefrom is formed as a part of an optical block (4), thereby simply and highly accurately forming the optical surfaces (3a?, 12). Then, the optical plate (3) and the optical block (4) are simply and highly accurately combined by being fitted together by means of fitting sections (21, 25).

Abstract: A lens array is provided with a prism adhered within a prism placement recessing section by an adhesive, wherein retention of air-bubbles in the adhesive on an optical path of light of each light-emitting element between the prism placement recessing section and the prism is prevented by a first air-bubble retention prevention recessing section and a second air-bubble retention prevention recessing section that communicate with the prism placement recessing section in a lens array direction, and flowing of the adhesive onto a total reflection surface is prevented by an adhesive flow prevention recessing edge section.

Abstract: A surface (3a?) having light of a light emitting element (10) inputted thereto and monitor light outputted therefrom is formed as a part of an optical plate (3), and an output surface (12) having coupling light outputted therefrom is formed as a part of an optical block (4), thereby simply and highly accurately forming the optical surfaces (3a?, 12). Then, the optical plate (3) and the optical block (4) are simply and highly accurately combined by being fitted together by means of fitting sections (21, 25).

Abstract: The wafer polishing apparatus comprises a polishing plate, a polishing head capable of holding a wafer, and a slurry supplying section. The polishing plate includes: a plurality of concentric polishing zones, each of which has a prescribed width for polishing the wafer and on each of which a polishing cloth is adhered; and a groove for discharging slurry being formed between the polishing zones. A head cleaning section, which cleans the polishing head, or a wafer cleaning section, which cleans the polished wafer, is provided to a center part of the polishing plate and located on the inner side of the innermost polishing zone.

Abstract: A lens array is provided in which the edges of concave-shaped lens faces can be formed with high accuracy and the accuracy of position measurement of the lens faces can be improved. Outer peripheral edge portions 7a of a plurality of lens faces 7 are formed in positions further towards face apex portion sides than a predetermined surface 2 with cylindrical stepped surfaces 12 for each lens face 7 therebetween, one end of the stepped surfaces 12 being the outer peripheral edge portions 7a and another end being a plurality of opening portions 2a formed on the predetermined surface 2 such as to respectively face the outer peripheral edge portions 7a.