Abstract: An optical device includes: an optical system including a moving lens that moves in a direction along an optical axis; a moving frame including a first magnetic body and configured to hold the moving lens; a holding frame formed into a cylindrical shape by a non-magnetic body and configured to movably hold the moving frame on an inner circumferential surface along the optical axis, a drive unit including a magnet and configured to cause the moving frame to move in the direction along the optical axis; and second magnetic bodies arranged between the drive unit and the moving frame and configured to transmit a magnetic force of the magnet to the first magnetic body of the moving frame.

Abstract: An endoscope has a configuration in which a wire guide tube is configured as a tube consecutively formed of polyetheretherketone from one end side to another end side, an opening penetrating is provided in a radial direction at part of a wall portion of a second coupling member into which an end part of the wire guide tube is inserted, a concave portion corresponding to the opening is provided at an outer peripheral surface of the end part of the wire guide tube, and a bonding agent integrally fills the opening and the concave portion to connect the wire guide tube and a coupling portion (the second coupling member).

Abstract: A magneto-optical memory interface includes: a memory cell structure having multiple allocated magnetic recording cells, a selection means configured to select an individual or a predetermined number of the multiple allocated magnetic recording cells of the memory structure, and configured for an electronic signal to be applicable thereto; and a light irradiation part configured to irradiate the predetermined number of the multiple allocated magnetic memory cells with an optical signal, wherein each of the magnetic recording cells is a magnetic recording cell whose sensitivity to changes in a magnetization state thereof increases in response to an irradiation light from the light irradiation part, and each of the magnetic recording cells is a magnetic recording cell whose magnetization state changes in response to an applied electrical signal resulting from selection by the selection means and the irradiation light from the light irradiation part.

Abstract: A layered structure which achieves both high spin polarization and low electrical resistance is provided. The layered structure includes a Heusler alloy, and graphene that is in direct contact with the surface of the Heusler alloy. Such a layered structure is fabricated by forming a thin film of the Heusler alloy over a substrate under vacuum, and growing graphene on the surface of the thin film of the Heusler alloy while maintaining the vacuum.

Abstract: An endoscope has a configuration in which a wire guide tube is configured as a tube consecutively formed of polyetheretherketone from one end side to another end side, an opening penetrating is provided in a radial direction at part of a wall portion of a second coupling member into which an end part of the wire guide tube is inserted, a concave portion corresponding to the opening is provided at an outer peripheral surface of the end part of the wire guide tube, and a bonding agent integrally fills the opening and the concave portion to connect the wire guide tube and a coupling portion (the second coupling member).

Abstract: A surface light source device includes a light source substrate in which a plurality of light sources capable of being driven independently of one another are disposed, a light guide plate provided on the light source substrate to emit, from a specific emission surface, light entered from the plurality of light sources, and a partition frame having a partition wall for dividing the light guide plate into a plurality of cells. The partition wall of the partition frame partially has cutout portions. The light guide plate is connected between adjacent cells through the cutout portions of the partition wall.

Abstract: An image pickup unit includes an objective lens unit, cover glass fixed on a light receiving surface of an image pickup device, a circular optical member stuck to a front end face of the cover glass and having a diameter smaller than a diagonal line length of the cover glass, a holding frame having a circular fitting hole in which the optical member is fit from a rear, a first light blocking member disposed in a front of the optical member, and a second light blocking member disposed between a rear end face of the optical member and a front end face of the cover glass.

Abstract: A surface light source device includes a light source substrate in which a plurality of light sources capable of being driven independently of one another are disposed, a light guide plate provided on the light source substrate to emit, from a specific emission surface, light entered from the plurality of light sources, and a partition frame having a partition wall for dividing the light guide plate into a plurality of cells. The partition wall of the partition frame partially has cutout portions. The light guide plate is connected between adjacent cells through the cutout portions of the partition wall.

Abstract: A perpendicular magnetic recording medium includes a perpendicular magnetic layer provided above a nonmagnetic substrate, and a protection layer provided on the perpendicular magnetic layer. The perpendicular magnetic layer has an hcp structure, and includes stacked layers having a (0002) crystal plane oriented parallel to a surface of the nonmagnetic substrate. An uppermost layer amongst the stacked layers includes polycrystal grains selected from a CoCr-base alloy, a CoPt-base alloy, a CoCrPt-base alloy, and a CoPtCr-base alloy. The protection layer makes contact with the uppermost layer of the perpendicular magnetic layer, and includes a single graphene layer or a graphene stack, and an amorphous carbon layer. The single graphene layer or the graphene stack is bonded in parallel to a (0002) crystal plane of the polycrystal grains.

Abstract: An envelope of a point light source includes first to fourth surfaces. The first surface protrudes ahead of a light-emitting element and extends to a left side and a right side of the light-emitting element when viewed from the light-emitting element. The second surface is connected to the first surface on the left side and the right side of the light-emitting element and is in contact with the light-emitting element. The third surface is connected to an upper end of the first surface and an upper end of the second surface and forms a first depression that sinks from the first surface toward the second surface. The fourth surface is connected to a lower end of the first surface and a lower end of the second surface and forms a second depression that sinks from the first surface toward the second surface.

Abstract: The present invention relates to an area light source device and a display device using the area light source device. The present invention includes a point light source, and a light guide plate. The light guide plate includes a protruding structure on a light entrance surface side. The protruding structure protrudes from a light exit surface side or a counter light exit surface side opposite from the light exit surface. The point light source includes an arrangement of point light sources. The protruding structure is configured such that oblique cylinders each having a semicircular upper surface protrude and arranged in a direction of the arrangement of the point light sources. The point light sources are arranged so that the lines of intersection of adjacent ones of the oblique cylinders coincide with the middles of the point light sources, respectively.

Abstract: An image pickup unit includes an objective lens unit, cover glass fixed on a light receiving surface of an image pickup device, a circular optical member stuck to a front end face of the cover glass and having a diameter smaller than a diagonal line length of the cover glass, a holding frame having a circular fitting hole in which the optical member is fit from a rear, a first light blocking member disposed in a front of the optical member, and a second light blocking member disposed between a rear end face of the optical member and a front end face of the cover glass.

Abstract: A planar light source apparatus includes a point light source and a light guide plate shaped like a flat plate with a rectangular shape in a plan view. The light guide plate includes an output surface confronting an opening portion, a pair of second side surfaces opposed to each other, and a hole opening in a non-output surface and formed near one of the first side surfaces at a position where the point light source is to be arranged. Each of the pair of second side surfaces is at least partially configured as a prism whose ridge line extends in a direction perpendicular to the output surface and whose cross-section, when sectioned in a direction parallel to the output surface, has a sawtooth-like shape in which concavity and convexity are repeated. A light of the point light source can be efficiently uniformized in the light guide plate, and thus unevenness of brightness can be prevented.

Abstract: A perpendicular magnetic recording medium includes a perpendicular magnetic layer provided above a nonmagnetic substrate, and a protection layer provided on the perpendicular magnetic layer. The perpendicular magnetic layer has an hcp structure, and includes stacked layers having a (0002) crystal plane oriented parallel to a surface of the nonmagnetic substrate. An uppermost layer amongst the stacked layers includes polycrystal grains selected from a CoCr-base alloy, a CoPt-base alloy, a CoCrPt-base alloy, and a CoPtCr-base alloy. The protection layer makes contact with the uppermost layer of the perpendicular magnetic layer, and includes a single graphene layer or a graphene stack, and an amorphous carbon layer. The single graphene layer or the graphene stack is bonded in parallel to a (0002) crystal plane of the polycrystal grains.

Abstract: A surface light source apparatus capable of keeping a high in-plane brightness uniformity and a high light utilization efficiency without increasing the size of a frame, and also to provide a display apparatus including the surface light source apparatus. The surface light source apparatus includes a point light source, and a light guide plate having a hole formed near first side surface that is one side surface thereof, the hole being formed at a position where the point light source is to be arranged. The first side surface of the light guide plate has, in a portion thereof near the hole, a prism having a saw-toothed shape in a cross-section thereof parallel to a front surface of the light guide plate.

Abstract: The display apparatus of the present invention is a display apparatus for a head-up display, and is provided with a liquid crystal display which has a single display region including a first display region and a second display region, a half mirror which reflects first exit light exiting from the first display region of the liquid crystal display, and a plane mirror which reflects second exit light exiting from the second display region of the liquid crystal display toward the half mirror. The first exit light which has been reflected by the half mirror and the second exit light which has penetrated the half mirror are led out of the apparatus in an overlapping state.

Abstract: A planar light source device with highly uniform intensity and high light utilization efficiency, and a display apparatus incorporating the same, are provided. A light guide plate, configured by a material such as plate-shaped and transparent acryl resin, polycarbonate resin, or glass, causes incident light to propagate within the light guide plate and then to exit the light through an exit surface as a surface emitting light. A first recess is formed substantially in the center of the exit surface. The first recess is cylinder-shaped, and on a bottom thereof is provided a lens that refracts incident light from a light source, in a direction away from the center of a circle on the bottom.

Abstract: The present invention relates to an area light source device and a display device using the area light source device. The present invention includes a point light source, and a light guide plate. The light guide plate includes a protruding structure on a light entrance surface side. The protruding structure protrudes from a light exit surface side or a counter light exit surface side opposite from the light exit surface. The point light source includes an arrangement of point light sources. The protruding structure is configured such that oblique cylinders each having a semicircular upper surface protrude and arranged in a direction of the arrangement of the point light sources. The point light sources are arranged so that the lines of intersection of adjacent ones of the oblique cylinders coincide with the middles of the point light sources, respectively.

Abstract: A planar light source device includes a housing having an opening, point light sources arranged on at least one side surface in the housing, a light guide plate arranged in the housing and having a light-emitting surface facing the opening and a counter-emitting surface being opposite to the light-emitting surface, a reflecting sheet arranged on the counter-emitting surface side of the light guide plate in the housing, and a reflecting region arranged on at least a part of a peripheral portion of the point light sources on the side surface on which the point light sources are arranged in the housing and absorbing light having at least some wavelength.

Abstract: An image-capturing apparatus and a repair method thereof are provided. The image-capturing apparatus includes a lens frame to which one or more lenses are fixed; an image-capturing frame to which an image-capturing device is fixed; and a fixing member for fixing the lens frame and the image-capturing frame to each other without adhering a fitted portion between the lens frame and the image-capturing frame. The repair method for the image-capturing apparatus includes destructing a fixing member for fixing to each other a lens frame to which one or more lenses are fixed and an image-capturing frame to which an image-capturing device is fixed, and releasing fixing between the frames; replacing at least either of the lens frame and the image-capturing frame; and fixing to each other the lens frame and the image-capturing frame.