Abstract: Provided is an ink jet recording method capable of recording a high-quality image that is less liable to cause blocking and generate a scratch caused by tightening and that is free of unevenness even when a recording medium having been subjected to image recording is wound up into a roll. The ink jet recording method is a method of recording an image on a roll of recording medium with use of an aqueous ink and an aqueous reaction liquid. The ink jet recording method includes: a reaction liquid applying step of applying the reaction liquid to the recording medium; an ink applying step of applying the aqueous ink to the recording medium; a drying step of drying the aqueous ink by applying hot air; a cooling step of decreasing the surface temperature of the recording medium; and a wind-up step of winding up the cooled recording medium into a roll.

Abstract: Provided is an ink jet recording method capable of recording an image having satisfactory uniformity and suppressed stickiness on a low-absorbent or non-absorbent recording medium. The ink jet recording method includes recording an image on a low-absorbent or non-absorbent recording medium with an aqueous ink and an aqueous reaction liquid containing a reactant that reacts with the ink by applying the ink and the reaction liquid to the recording medium by a one-pass system. A step of applying the reaction liquid to the recording medium by ejecting the reaction liquid from a first ejection head and a step of applying the ink to the recording medium by ejecting the ink from a second ejection head so that a region to which the aqueous ink is applied and a region to which the reaction liquid is applied are at least partially overlap on the recording medium.

Abstract: An optical coupling element of the invention includes: a plurality of incident surfaces having a predetermined curvature, where light emitted from a plurality of light-emitting elements is respectively incident; a reflective surface reflecting the light incident respectively on the incident surfaces and having a predetermined curvature; and a plurality of output surfaces respectively outputting the light reflected by the reflective surface toward an end face of an optical fiber and having a predetermined curvature. The curvatures for the incident surfaces, the reflective surface, and the output surfaces are adjusted such that the X-direction tolerance is greater than the Y-direction tolerance. Here, the alignment direction of the plurality of incident surfaces is the X direction, the advancement direction of the light is the Z direction, and the direction perpendicular to the X and Z directions is the Y direction.

Abstract: An optical receptacle is capable of actualizing, at low cost, optical transmission accompanying monitoring in which light of a light-emitting element is extracted in a direction along a substrate at an optical transmission body. In an embodiment, light of a light-emitting element 7 that has been incident on a first surface 2a (11) is separated into coupling light and monitor light using total reflection at a coupling light total reflection surface 14 and a first monitor light total reflection surface 15. The coupling light is emitted towards an optical transmission body 5 from a third surface 2c (12), and the monitor light is emitted towards a light-receiving element 8 from the first surface 2a (13).

Abstract: An optical coupling element of the invention includes: a plurality of incident surfaces having a predetermined curvature, where light emitted from a plurality of light-emitting elements is respectively incident; a reflective surface reflecting the light incident respectively on the incident surfaces and having a predetermined curvature; and a plurality of output surfaces respectively outputting the light reflected by the reflective surface toward an end face of an optical fiber and having a predetermined curvature. The curvatures for the incident surfaces, the reflective surface, and the output surfaces are adjusted such that the X-direction tolerance is greater than the Y-direction tolerance. Here, the alignment direction of the plurality of incident surfaces is the X direction, the advancement direction of the light is the Z direction, and the direction perpendicular to the X and Z directions is the Y direction.

Abstract: An optical receptacle disposed between a photoelectric conversion device and an optical fiber includes a light separating section for separating incident light into monitor light and fiber coupled light, which section includes a segmented reflective surface and a segmented transmitting surface. The reflective surface for reflecting light as monitor light is disposed in a segmented manner with spaces in a segmentation direction. The transmitting surface is disposed in a segmented manner in areas where the reflective surface is not disposed, so as to transmit a portion of light other than the reflected light in a direction directly oppose to the direction of the reflected light and to advance the other portion of light towards the side of an end face of the optical fiber.

Abstract: An optical receptacle is capable of actualizing, at low cost, optical transmission accompanying monitoring in which light of a light-emitting element is extracted in a direction along a substrate at an optical transmission body. In an embodiment, light of a light-emitting element 7 that has been incident on a first surface 2a (11) is separated into coupling light and monitor light using total reflection at a coupling light total reflection surface 14 and a first monitor light total reflection surface 15. The coupling light is emitted towards an optical transmission body 5 from a third surface 2c (12), and the monitor light is emitted towards a light-receiving element 8 from the first surface 2a (13).

Abstract: An optical receptacle disposed between a photoelectric conversion device and an optical fiber includes a light separating section for separating incident light into monitor light and fiber coupled light, which section includes a segmented reflective surface and a segmented transmitting surface. The reflective surface for reflecting light as monitor light is disposed in a segmented manner with spaces in a segmentation direction. The transmitting surface is disposed in a segmented manner in areas where the reflective surface is not disposed, so as to transmit a portion of light other than the reflected light in a direction directly oppose to the direction of the reflected light and to advance the other portion of light towards the side of an end face of the optical fiber.

Abstract: An optical receptacle includes a cylindrical optical fiber attaching section for attaching an end portion of an optical fiber, a cylindrical photoelectric conversion device attaching section for attaching a photoelectric conversion device having a light-receiving element, and a lens for optically coupling the end portion of the optical fiber and the light-receiving element. A face of the lens that faces the end portion of the optical fiber is formed into a planar face having a slope angle of 14 degrees to 16 degrees in relation to a virtual plane perpendicular to an optical axis of the lens.

Abstract: To enable detection of images of peripheral end sections of a first lens face 4 and a second lens face 6, when the positions of the first lens face 4 and the second lens face 6 are measured, to be performed simply by detection operations on the first lens face 4 side, the first lens face 4 is formed having a smaller diameter than the second lens face 6 corresponding to the first lens face 4, and the image of the peripheral end section of the second lens face 6 can be detected from the first lens face side by transmission of light from a light-transmissive substrate 2.

Abstract: An optical receiver module 1 includes : a sleeve that holds an optical fiber; an optical flat surface provided in the sleeve and into which light emitted from the optical fiber enters; a lens provided in the sleeve that converges and emits the light that has entered the optical flat surface; and a light-receiving element that receives the light emitted from the lens and converts optical Signals to electrical signals. The optical flat surface is formed such as to be tilted by 20° to 40° or 60° to 70° in relation to a light-receiving surface of the light-receiving element.