Abstract: A sealing body according to the present invention is sealing body for a sealed battery including conductive terminal cap, a conductive explosion-proof valve electrically connected to the terminal cap, a conductive terminal plate having an abutting surface abutting the explosion-proof valve, and an insulating plate disposed between the explosion-proof valve and the terminal plate. A welded part between the explosion-proof valve and the terminal plate is formed in the inner part of the abutting surface, and the plan-view shape of the welded part is a shape defining an enclosed region, a C-shape, or a spiral shape. A notch part surrounding the welded part is formed in the terminal plate. The breaking pressure of the welded part is higher than the breaking pressure of the notch part.

Abstract: An impeller is provided with: a disk rotating about an axis; and a plurality of blades provided on the disk at intervals in a circumferential direction about the axis. Thicknesses of the blades gradually decrease from a disk side toward a tip side, and a decrease rate of the thicknesses gradually decreases from the disk side toward the tip side.

Abstract: An optical component for reflecting incident light at a predetermined reflection angle, includes: a scan portion having a reflection surface and scanning the reflection angle; and a package accommodating the scan portion, and having a main body of a box shape with one open surface and a lid which covers the one open surface and transmits the incident light and reflected light. The lid includes at least one base portion having a counter surface facing the reflection surface and a back surface opposed to the counter surface, and a diffraction lens portion arranged on at least one of the counter surface and the back surface and having a periodic concavo-convex shape so as to widen the reflection angle.

Abstract: The present invention relates to a microlens array comprising a transparent substrate, a resin layer provided on/above at least one surface of the transparent substrate, containing a photosensitive resin and forming a plurality of microlenses, and a functional layer reflecting at least light for reacting the photosensitive resin, the functional layer is formed on a surface of the transparent substrate at a side on which the resin layer is not formed, or on the surface of the transparent substrate at the side on which the resin layer is formed and at a position nearer the transparent substrate than the resin layer.

Abstract: A sealing body according to the present invention is sealing body for a sealed battery including conductive terminal cap, a conductive explosion-proof valve electrically connected to the terminal cap, a conductive terminal plate having an abutting surface abutting the explosion-proof valve, and an insulating plate disposed between the explosion-proof valve and the terminal plate. welded part between the explosion-proof valve and the terminal plate is formed in the inner part of the abutting surface, and the plan-view shape of the welded part is a shape defining an enclosed region, a C-shape, or a spiral shape. A notch part surrounding the welded part is formed in the terminal plate. The breaking pressure of the welded part is higher than the breaking pressure of the notch part.

Abstract: Provided is a rotating machine that is provided with: a rotating shaft (2); a plurality of impellers (3) that are affixed to the rotating shaft (2) and that rotate with the rotating shaft (2); and a casing (5) that surrounds the rotating shaft (2) and the impellers (3), and that forms diffuser channels (19) through which is circulated a fluid (G) that is discharged from the impellers (3) in the radial direction toward the outside and return channels (20) that guide the fluid (G) circulated in the diffuser channels (19) in the radial direction toward the inside and lead the fluid (G) to downstream impellers (3).

Abstract: The impeller is provided with a disk that rotates about an axis line, and a plurality of blades provided at intervals around the circumference of the disk. Defining the blade angle of the tip of each blade as a first blade angle, the tip has a constant-tip-angle area in which the first blade angle is constant from an inlet where fluid flows in toward an outlet side, and an increasing-tip-angle area that is continuous with the outlet side of the constant-tip-angle area and that has a gradually increasing first blade angle towards the outlet.

Abstract: Provided is a centrifugal compressor in which a malfunction such as shaft vibration due to rotating stall is suppressed, and degradation of performance due to friction losses or the like is suppressed. In a centrifugal compressor (10) including a diffuser section (15) for circulating fluid discharged from an impeller (13), a flow path width W2 of the diffuser section (15) at an inflow position where the fluid flows in the diffuser section (15) is narrower than a flow path width W1 of the impeller (13) at a discharge position where the fluid is discharged from the impeller (13), and a flow path width enlarged section (15c) wider than the flow path width W1 of diffuser section (15) at the inflow position is provided on a downstream side with respect to the inflow position of the diffuser section (15).

Abstract: A centrifugal compressor includes an impeller configured to discharge a fluid that flows into one side in an axial direction from an outlet that is directed outward in a radial direction, and a casing installed to surround the impeller and having an outlet flow channel configured to increase a pressure of the fluid as the fluid flows downstream while the fluid discharged from the outlet of the impeller flows therethrough, wherein a circulation flow channel having a first opening section connected to the outlet flow channel and a second opening section connected to an upstream side of the first opening section in the outlet flow channel.

Abstract: A sealing body of a battery includes a positive electrode cap, a safety valve electrically connected to the positive electrode cap, a plurality of protrusions that are disposed annularly and intermittently on the outer peripheral side of a conductive contact part of the safety valve and that are each formed so as to be inclined toward the center of the sealing body, and an insulating member that covers at least top parts of the plurality of protrusions, side surfaces thereof on the center side, and a surface of the safety valve on the center side, that is fitted to the center side of the plurality of protrusions, whose vertical sectional shape is bent in a Z-shape. A terminal plate is fitted and fixed to the center side of the insulating member and is connected by welding to the conductive contact portion through a central opening of the insulating member.

Abstract: An optical device includes a base material including a surface on which multiple concaves are formed. The concaves include respective curved surfaces. The concaves are formed so that the bottoms of the concaves are at two or more different positions in a depth direction. In the optical device, 2/7?|(n1?n2)×?d|/??10 holds, where n1 is the refractive index of the base material, n2 is the refractive index of a medium around the concaves, ? is the wavelength of a beam flux that enters the base material, and ?d is a range of the positions of the bottoms in the depth direction.

Abstract: A liquid component sensor includes: an infrared light source; a detection cell including: two substrates made of material for penetrating an infrared light therethrough and stacked each other; a passage for flowing liquid arranged between facing surfaces of the substrates; and a detection portion for detecting the liquid provided by at least a part of the passage; a spectrometer for dispersing light penetrating the detection cell; and a light detector for detecting dispersed light. Each substrate includes outside and facing surfaces, so that two substrates provide four surfaces totally. The detection cell further includes a filter for passing the infrared light having a predetermined wavelength selectively. The filter is disposed on at least one of four surfaces at a predetermined position, which corresponds to at least the detection portion.

Abstract: The present invention relates to a microlens array comprising a transparent substrate, a resin layer provided on/above at least one surface of the transparent substrate, containing a photosensitive resin and forming a plurality of microlenses, and a functional layer reflecting at least light for reacting the photosensitive resin, the functional layer is formed on a surface of the transparent substrate at a side on which the resin layer is not formed, or on the surface of the transparent substrate at the side on which the resin layer is formed and at a position nearer the transparent substrate than the resin layer.

Abstract: A lens reflecting a light of a predetermined wavelength, or transmitting and condensing or diverging the light is provided. The lens includes a substrate, and a quasi-periodic structure layer. A plane of the quasi-periodic structure layer is divided into unit cells and is filled with the unit cells in a two-dimensional period. The unit cell has a first region and a second region. An occupancy rate is changed as a distance from a center of the substrate. A resonance mode is defined by a relationship between the occupancy rate and the period length. A lowest order resonance mode is defined by the resonance mode. The period length is set to a predetermined value within a predetermined range including an optimum value. Another lens is provided. A minimum occupancy rate is defined by a smallest occupancy rate. A variation range of the occupancy rate changes across the minimum occupancy rate.

Abstract: A Fabry-Perot interferometer includes an input mirror and an output mirror arranged facing the input mirror via a gap. Each mirror includes a pair of high-refractive layers and a space layer arranged selectively between the high-refractive layers. At least one of an input-side bridge part and an output-side bridge part arranged crossing the gap, is movable as a membrane. Each bridge part includes a transmission portion and a periphery portion. Each transmission portions includes a mirror element in which the space layer is sandwiched by the pair of high-refractive layers. In a second direction perpendicular to the first direction, the mirror element of the input mirror has a width larger than seven times of a maximum wavelength of a transmission light output from the output mirror, and functions as a diffraction restriction mirror.

Abstract: A microlens array to be used in combination with a pixel array of an imaging element. The microlens includes a glass substrate; and a plurality of microlenses provided on at least one surface of the glass substrate and arranged in an array shape. Each of the plurality of the microlenses is constituted such that light to be entered into the microlens is received by a plurality of pixels of the imaging element. A difference between a coefficient of linear expansion of the glass substrate and a coefficient of linear expansion of an imaging element substrate having the pixel array formed thereon or member of a package to be bonded to the imaging element substrate is within 8×10?6 (/K).