Abstract: A secondary battery according to an embodiment includes a container having a pouring hole through which an electrolyte is poured, and housing the electrolyte, poured through the pouring hole, together with an electrode body; and a sealing lid fixed to the container and closing the pouring hole. The container has a plurality of grooves extending in parallel along the outer edge of the pouring hole, in a predetermined region that surrounds the periphery of the pouring hole, and the sealing lid is provided on the plurality of grooves in such a manner as to close the pouring hole and is fixed to the container.

Abstract: An optical module comprises an apodizer includes a black resin layer having a concavity the diameter of which gradually changes in a direction light passes through the apodizer, and, provided in the concavity, a transparent resin layer having the same refractive index as the black resin layer, the black resin layer and the transparent resin layer having a total thickness of 0.001 to 0.10 mm, an input lens opposed to the black resin layer of the apodizer and an output lens opposed to the transparent resin layer of the apodizer.

Abstract: According to one embodiment, an image display device includes first and second display devices and an optical plate. The first display device includes a first display region and a frame region provided around the first display region. The second display device includes a second display region and a frame region provided around the second display region. The optical plate covers the first and second display regions and includes a light incident surface and a light exit surface. The light incident surface opposes the first and second display regions. The optical plate is configured to emit at least a portion of light emitted from any first point of the first display region and incident on an opposing point of the first point of the light incident surface in a direction from the first display region side toward the second display region side.

Abstract: According to one embodiment, a solid-state imaging element includes a substrate, and a plurality of color filters. A plurality of photoelectric conversion units is provided in the substrate. The plurality of color filters is provided respectively for the plurality of photoelectric conversion units. The plurality of color filters is configured to selectively transmit light of a designated wavelength band. Each of the plurality of color filters includes a stacked structure unit and a periodic structure unit. A plurality of layers having different refractive indexes is stacked in the stacked structure unit. A plurality of components is provided in the periodic structure unit at different periods according to the designated wavelength band and an incident angle of the light.

Abstract: In accordance with an embodiment, a pattern inspection apparatus includes a beam splitter, a polarization controller, a phase controller, a wave front distribution controller, and a detector. The beam splitter generates signal light and reference light from light emitted from a light source. The signal light is reflected light from a pattern on a subject to be inspected. The polarization controller is configured to control the polarization angle and polarization phase of the reference light. The phase controller is configured to control the phase of the reference light. The wave front distribution controller is configured to control a wave front distribution of the reference light. The detector is configured to detect light resulting from interference caused by superposing the signal light and the reference light on each other.

Abstract: A display device is provided that includes: a projection unit emitting a light flux including image information; and a divergence angle controlling unit controlling a divergence angle of the light flux emitted from the projection unit to not more than a prescribed angle. The divergence angle controlling unit includes a transmission unit transmitting the light flux emitted from the projection unit and a light shielding unit shielding part of the light flux, and the part of the light flux is shielded by the light shielding unit so that the divergence angle of the light flux is controlled to not more than a prescribed angle.

Abstract: A secondary battery according to an embodiment includes a container having a pouring hole through which an electrolyte is poured, and housing the electrolyte, poured through the pouring hole, together with an electrode body; and a sealing lid fixed to the container and closing the pouring hole. The container has a plurality of grooves extending in parallel along the outer edge of the pouring hole, in a predetermined region that surrounds the periphery of the pouring hole, and the sealing lid is provided on the plurality of grooves in such a manner as to close the pouring hole and is fixed to the container.

Abstract: A secondary battery according to an embodiment includes a container having a pouring hole through which an electrolyte is poured, and housing the electrolyte, poured through the pouring hole, together with an electrode body; and a sealing lid which is fixed to the container and is closing the pouring hole. The sealing lid has a welding mark existing in a ring shape with a depth through the sealing lid to a lid body of the container, and an inner circumferential side molten mark existing in a ring shape overlapping with the welding mark, on the inner circumferential side of the welding mark in the sealing lid, with a depth corresponding to the thickness of the sealing lid.

Abstract: The analyzer according to the embodiment comprises an irradiation optical part that irradiates a mixture inside reaction tubes with light from a light source. Moreover, a detection optical part detects light transmitted through the mixture. Moreover, the irradiation optical part comprises a first optical element in which the light source is disposed at the front focal position and that concentrates light from the light source. Moreover, a second optical element guides light transmitted through the first optical element to the reaction tubes. In addition, an incident numerical aperture adjustment member is provided at the rear side of the first optical element and adjusts the numerical aperture when light from the light source is incident on the reaction tubes.

Abstract: An automotive display system includes an image projection unit and an angle information acquisition unit. The image projection unit projects a light flux including an image including a display object toward one eye of an image viewer. The angle information acquisition unit acquires at least one of vehicle angle information and external environment angle information. The vehicle angle information relates to an angle of at least one of an attitude and a heading of a vehicle carrying the image viewer. The external environment angle information relates to an angle of a background object at a target position of the display object in a background of an external environment of the vehicle. The image projection unit changes an angle of the display object in the image based on at least one of the vehicle angle information and the external environment angle information acquired by the angle information acquisition unit.

Abstract: According to one embodiment, an illumination device includes a light guide plate and a plurality of light sources. The light guide plate includes a light emitting surface. The plurality of light sources whose light emission luminance can be controlled individually, the light sources being configured to supply light from an edge portion of the light guide plate into the light guide plate. A luminance distribution of light injected from the light sources into the light guide plate and emitted from the light emitting surface is obtained by a function such that relative intensity relative to a DC component in a spatial frequency region is less than or equal to a first threshold in a spatial frequency region having a value of one or more. Source-to-source distance of the light sources is optimized by the luminance distribution of the light.

Abstract: A reflective screen includes: a substrate having a first refractive index; and a periodic structure provided on a major surface of the substrate and including a periodic film which has a period ? and is made of a material having a second refractive index that is higher than the first refractive index. The period ? is not less than 400/(N+1) nm and not more than 680/(N?1) nm, where N is an equivalent refractive index of the periodic film.

Abstract: According to one embodiment, an optical element includes a first optical sheet having a first major surface. The first optical sheet includes a first Fresnel lens provided in the first major surface. An optical axis of the first Fresnel lens at the first major surface is disposed at a position different from a position of a center of an outline of the first major surface.

Abstract: To provide an image irradiation system and an image irradiation method which can make an image information in an outdoor side of a vehicle be recognized by a driver precisely without widely moving a view point of the driver. An image irradiation system includes a first photographing module photographing a driver of a vehicle, a position calculation module calculating a single eye position of the driver from an image photographed by the first photographing module, an image information generating module creating an outdoor image information of the vehicle, and an irradiation module irradiating the outdoor image information to the single eye position calculated by the position calculation module.

Abstract: A backlight for a liquid crystal display device includes a plurality of point light sources 1 arranged linearly, a light guide plate 3 having a light incident surface 3a, a reflection surface 3b and a light emitting surface 3c for emitting the light reflected by the reflection surface 3b. A light scattering pattern 31 is formed on the reflection surface 3b. A light control pattern 32 is formed on the reflection surface 3b at almost entire portions except for the light scattering pattern 31 is formed for reflecting the light introduced and for outputting from the light emitting surface 3c. A pattern less area is formed on the reflection surface 3b at a boundary portion between the light scattering pattern 31 and the light control pattern 32.

Abstract: An array-type light receiving device includes a first light collector, a second light collector configured to receive light collected by the first light collector, and a light receiver configured to receive light collected by the second light collector. The first light collector has a spherical shape, the second light collector has a high refractive index portion and a low refractive index portion, and the high refractive index portion has one of a cylindrical shape and a polygonal prismatic shape.

Abstract: A head-up display optical film includes: a first optical layer configured to convert the polarization plane of incident light by 90 degrees; a second optical layer configured to convert the polarization plane of incident light by 90 degrees; and an intermediate optical layer sandwiched between the first optical layer and the second optical layer and having a refractive index that is different from the refractive index of the first optical layer and from the refractive index of the second optical layer.

Abstract: A solid-state imaging device includes: a substrate including a plurality of light receiving sections; and a color filter including a guided-mode resonant grating provided immediately above each of the plurality of light receiving sections, at least one of an upper surface and a lower surface of the guided-mode resonant grating being covered with a layer having a lower refractive index than the guided-mode resonant grating.

Abstract: An imaging device includes: an imaging lens; a light receiving element including a light receiving portion configured to sense light transmitted through the imaging lens; and a high refractive index member packed between the imaging lens and the light receiving element and having a higher refractive index than air.

Abstract: A display device, generating light flux containing image information and making the light flux incident to one-eye of an image viewer by controlling an angle of divergence of the light flux is provided. The device includes a first lens, a second lens and an angle of divergence control device provided between the first lens and the second lens, the angle of divergence control device being configured to control the angle of divergence of the light flux.