Abstract: An optical connection component includes: an input end that separates each of light beams output from an output end surface of a multi-core fiber toward single-core fibers, and enlarges each beam diameter of the light beams; and an output end that allows the light beams from the input end to be parallel to an axial direction of the multi-core fiber. The optical connection component guides the light beams output from the output end surface, inclined with respect to a plane perpendicular to the axial direction, to the single-core fibers, wherein the light beams output from the output end surface propagate in a direction inclined with respect to the axial direction.

Abstract: A drill includes a substantially cylindrical cutting portion includes a first region located at a front end portion, and a second region which has a step whose diameter increases as going from the first region to a rear end in a sectional view perpendicular to a rotation axis, and which is continuous with the first region in an end of the second region on a side of the step, and using this drill, a method of manufacturing a machined product is provided.

Abstract: A drill of the present invention includes a first cutting edge and a second cutting edge each located at a front end of a cylindrical cutting part; a first flute and a second flute connected to the first cutting edge and the second cutting edge, respectively, in which the first and second flutes are positioned helically from a front end to a rear end on a peripheral section of the cutting part; and a first land and a second land each extended from the front end to the rear end on the peripheral section of the cutting part, in which the first and second lands are being located portions between the first flute and the second flute, respectively. The first flute and the second flute are separately extended from the front end to the rear end. The cutting part includes a first region in which a diameter of an inscribed circle in a cross section perpendicular to a rotation axis of the cutting part increases in a direction away from the front end and toward the rear end.

Abstract: A cutting tool according to an embodiment of the invention includes: a column-like shaped body having a cutting edge located at a front end part thereof and a flute which is located at an outer peripheral part thereof and is continuous with the cutting edge; a front taper connected to a rear end part of the body and having a larger diameter as separating from the body; a column-like shaped step connected to a rear end part of the front taper and having a larger diameter than the body; a rear taper connected to a rear end part of the step and having a larger diameter as separating from the step; a column-like shaped shank connected to a rear end part of the rear taper and having a larger diameter than the step; and a front connection member located in a region including the front taper and the step.

Abstract: A method for producing a print includes a step of thermally bonding a thermally transferrable image-protecting layer onto an image surface of an image-receiving sheet so as to form a protective layer. In this step, thermal energy applied is changed so that the resulting protective layer has a first glossy region and a second glossy region having a glossiness lower than that of the first glossy region. The first glossy region has a glossiness a, which is a 20° mirror-surface glossiness measured according to Japanese Industrial Standard Z8741. The second glossy region has a glossiness b, which is a 20° mirror-surface glossiness measured according to Japanese Industrial Standard Z8741. The value obtained by subtracting the glossiness b from the glossiness a is 60 or more.

Abstract: A drill includes a plurality of cutting edges formed at a front end portion; twisted flutes which are formed on an outer periphery from rear end portions of the cutting edges, respectively, and are configured to discharge chips produced by the cutting edges; and rake faces formed between the cutting edges and ends of the twisted flutes closer to the cutting edges, respectively, wherein the rake faces each includes a first face having a width from a corresponding one of the cutting edges decreasing as the first face approaches the outer periphery from an axis; and a second face located closer to the outer periphery than the first face, and having a width from the one of the cutting edges increasing as the second face approaches the outer periphery from the axis, a part of the twisted flute being formed between the first face and the second face.

Abstract: A drill of the present invention includes a first cutting edge and a second cutting edge each located at a front end of a cylindrical cutting part; a first flute and a second flute connected to the first cutting edge and the second cutting edge, respectively, in which the first and second flutes are positioned helically from a front end to a rear end on a peripheral section of the cutting part; and a first land and a second land each extended from the front end to the rear end on the peripheral section of the cutting part, in which the first and second lands are being located portions between the first flute and the second flute, respectively. The first flute and the second flute are separately extended from the front end to the rear end. The cutting part includes a first region in which a diameter of an inscribed circle in a cross section perpendicular to a rotation axis of the cutting part increases in a direction away from the front end and toward the rear end.

Abstract: A method for producing a print includes a step of thermally bonding a thermally transferrable image-protecting layer onto an image surface of an image-receiving sheet so as to form a protective layer. In this step, thermal energy applied is changed so that the resulting protective layer has a first glossy region and a second glossy region having a glossiness lower than that of the first glossy region. The first glossy region has a glossiness a, which is a 20° mirror-surface glossiness measured according to Japanese Industrial Standard Z8741. The second glossy region has a glossiness b, which is a 20° mirror-surface glossiness measured according to Japanese Industrial Standard Z8741. The value obtained by subtracting the glossiness b from the glossiness a is 60 or more.

Abstract: A twist drill is made of a carbide alloy and has a pair of helical flutes. The flutes are defined by heel surfaces. Each heel surface bulges, or is formed arcuate, and contacts a margin. The center of the arc is located in the drill. The radius of curvature of each heel surface is from one sixth to one third of the diameter of a drill portion. Stress that acts on heels due to forming holes is dispersed by the arcuate shape. This improves the rigidity of the twist drill. Also, swarf is reliably cleared and is not stuck in the flutes. This improves the smoothness of the surface of the formed hole.