Abstract: Provided is an optical film that can eliminate rainbow unevenness when viewed with the naked eyes and provide favorable color tone uniformity when viewed at an oblique angle. This optical film has a low-refractive index layer on a plastic film, the plastic film has a slow axis that is an axis with the largest refractive index in a plane, and a fast axis that is an axis orthogonal to the slow axis in the plane of the plastic film, and the low-refractive index layer is located on the surface of the optical film. Linearly polarized light is incident, under predetermined conditions, from a surface on a side opposite to the low-refractive index layer of the optical film, and transmitted light of the linearly polarized light is used to measure the a* value and b* value of the L*a*b* color system at 11 measurement points with different angles.

Abstract: A battery module includes: a stack including a plurality of battery cells arranged side by side in a first direction. A reference plane for positioning the stack in a direction orthogonal to the first direction is provided. The cover member includes a biasing portion that biases the stack in a direction away from the cover member. The biasing portion biases the stack to press the stack against the reference plane.

Abstract: A cover body has: a plurality of divided cover portions arranged side by side in a Y axis direction; an elastic deformation portion extending between the divided cover portions adjacent to each other; a first connection portion provided in a first divided cover portion disposed at one end portion in the Y axis direction, the first connection portion being connected to the attachment-target member so as to be fixed in the Y axis direction; a second connection portion provided in a second divided cover portion disposed at the other end portion in the Y axis direction, the second connection portion being connected to the attachment-target member so as to be fixed in the Y axis direction; and a third connection portion disposed between the first connection portion and the second connection portion and connected to the attachment-target member so as to be slidable in the Y axis direction.

Abstract: A battery module includes: a stack including a plurality of battery cells arranged side by side in a first direction; and a cover member having an insulating property, the cover member being provided to cover the stack from a side opposite to the electrode terminal. The cover member includes a first drainage portion located at a center portion of the cover member in a second direction orthogonal to the first direction, and a second drainage portion located at each of both end portions of the cover member in the second direction.

Abstract: A battery module includes: a plurality of stacked battery cells; a first cover body and a second cover body provided to cover the plurality of battery cells in a direction orthogonal to a stacking direction of the battery cells; a pair of binding bars that restrain the plurality of battery cells in the stacking direction of the battery cells; and a retainer connected to each of the binding bars. The first cover body has a first overlapping portion. The second cover body has a second overlapping portion disposed between each of the battery cells and the first overlapping portion and overlapping with the first overlapping portion in a direction orthogonal to the stacking direction of the battery cells. The first cover body is disposed between each of the battery cells and the retainer in the direction orthogonal to the stacking direction of the battery cells.

Abstract: The present disclosure addresses the problem of providing an optical plastic film such that rainbow unevenness when viewed with naked eyes and blackout when viewed with polarized sunglasses can be suppressed without any axis alignment or increase in the in-plane phase difference.

Abstract: In an electrochemical gas sensor (10), a first sensing element (21) is stored in a first storage portion (31). A moisture permeable film (24) is disposed in a first introduction inlet (31A) of the first storage portion (31). The moisture permeable film (24) substantially prevents a to-be-detected gas from permeating therethrough. A second sensing element (22) is disposed in a space into which water vapor and the to-be-detected gas contained in a target gas flow. In such a configuration, the electrochemical gas sensor (10) is capable of detecting a to-be-detected gas having a concentration of 0 or more and 1 ppm or less.

Abstract: The present disclosure addresses the problem of providing an optical plastic film such that rainbow unevenness when viewed with naked eyes and blackout when viewed with polarized sunglasses can be suppressed without any axis alignment or increase in the in-plane phase difference.

Abstract: Provided is an optical film that can eliminate rainbow unevenness when viewed with the naked eyes and provide favorable color tone uniformity when viewed at an oblique angle. This optical film has a low-refractive index layer on a plastic film, the plastic film has a slow axis that is an axis with the largest refractive index in a plane, and a fast axis that is an axis orthogonal to the slow axis in the plane of the plastic film, and the low-refractive index layer is located on the surface of the optical film. Linearly polarized light is incident, under predetermined conditions, from a surface on a side opposite to the low-refractive index layer of the optical film, and transmitted light of the linearly polarized light is used to measure the a* value and b* value of the L*a*b* color system at 11 measurement points with different angles.

Abstract: The present disclosure addresses the problem of providing a polyester film having favorable pencil hardness without an increase in the thickness. Disclosed is a polyester film having an average Martens hardness of 140.0 N/mm2 or more at a polyester film surface, wherein a standard deviation 36 of Martens hardness at the polyester film surface is 9.0 N/mm2 or more and 36.0 N/mm2 or less.

Abstract: An ornamental device includes: diamonds disposed on a single support element in a specific physical arrangement, all the diamonds in the specific physical arrangement having a blue fluorescent equal to or stronger than strong blue, wherein all the diamonds in the specific physical arrangement shining clear under a visible light, and shining blue under ultraviolet radiation keeping the specific physical arrangement distinguished from a group of diamonds in the specific physical arrangement, the group of diamonds comprising a mixture of a diamond or diamonds having a blue fluorescence equal to or stronger than strong blue and a diamonds or diamonds not having a blue fluorescent equal to or stronger than strong blue.

Abstract: The present disclosure addresses the problem of providing an optical plastic film having favorable pencil hardness without an increase in the in-plane phase difference. Disclosed is an optical plastic film comprising a first surface and a second surface that is a surface on a side opposite to the first surface, wherein the plastic film has an in-plane phase difference of 300 nm or more and 1,450 nm or less, and in a region within a depth of 20 ?m from the first surface in a direction from the first surface to the second surface, an average of an erosion rate is 1.4 ?m/g or more.

Abstract: Provided is an optical laminate that is excellent in terms of adhesion between a polyester film having a high degree of plane orientation ?P and an easy adhesive layer and suppresses a local defect without using an easy adhesive layer of a specific material. The easy adhesive layer, an uneven layer, and an antifouling layer are provided on the polyester film, when a refractive index in a slow axis direction in a plane of the polyester film is defined as nx, a refractive index in a direction orthogonal to the slow axis in the same plane is defined as ny, and a refractive index in a thickness direction of the polyester film is defined as nz, the polyester film satisfies the following formula 1-2, and, regarding the uneven layer, when a three-dimensional skewness of a surface of the uneven layer is defined as Ssk, and a three-dimensional arithmetic average roughness of the surface of the uneven layer is defined as Sa, Ssk and Sa satisfy the following formula 2-1. 0.140 ? ? P ­­­(1-2) 0.

Abstract: The present disclosure addresses the problem of providing an optical plastic film such that rainbow unevenness when viewed with naked eyes and blackout when viewed with polarized sunglasses can be suppressed without any axis alignment or increase in the in-plane phase difference.

Abstract: Provided is an anti-glare antireflection member capable of suppressing coloring in viewing in an oblique direction, and suppressing visual recognition of local luminescent spots. The anti-glare antireflection member comprises an anti-glare layer and a low refractive index layer on a substrate. The average of ?d is 7.0 nm or more and 40.0 nm or less, where ?d is a thickness difference of the low refractive index layer in an arbitrary 2 mm×2 mm region of the anti-glare anti refractive index layer.

Abstract: Provided is an optical film that can suppress rainbow unevenness when viewed with the naked eyes without increasing the in-plane phase difference. The optical film has a low-refractive index layer on a plastic film, the plastic film is a biaxially stretched plastic film with an in-plane phase difference of 2500 nm or less, the low-refractive index layer is located on the outermost surface, and the optical film has a region in which ?Eab satisfies specific conditions, wherein the ?Eab is calculated from the differences between the L* value, the a* value, and the b* value obtained by measuring a laminate 1 including the optical film, the polarizer, and the surface light source under specific conditions and the L* value, the a* value, and the b* value obtained by measuring a laminate 2 including the polarizer and the surface light source under specific conditions, respectively.

Abstract: Provided are an optical biaxially stretched plastic film, a polarizing plate, and an image display device that can suppress blackouts when viewed with polarized sunglasses, polarized goggles or the like without increasing the in-plane phase difference. In addition, a method for selecting an optical biaxially stretched plastic film is provided. The optical biaxially stretched plastic film has a region satisfying condition 1 and condition 2 below: <Condition 1> the difference between a luminance obtained in a specific measurement 1 and a luminance obtained in a specific measurement 2 (L1.n?L2.n) is calculated at each of 100 measurement points, and the “luminance difference variation 3?” calculated from the luminance differences at the 100 measurement points is 100 or more; and <Condition 2> the in-plane phase difference (Re) is 2500 nm or less.

Abstract: An ornamental device includes: diamonds disposed on a single support element in a specific physical arrangement, all the diamonds in the specific physical arrangement having a blue fluorescent equal to or stronger than strong blue, wherein all the diamonds in the specific physical arrangement shining clear under a visible light, and shining blue under ultraviolet radiation keeping the specific physical arrangement distinguished from a group of diamonds in the specific physical arrangement, the group of diamonds comprising a mixture of a diamond or diamonds having a blue fluorescence equal to or stronger than strong blue and a diamonds or diamonds not having a blue fluorescent equal to or stronger than strong blue.

Abstract: A jewelry box includes a lower box component; a diamond supported on the lower box component and having a blue fluorescence; an upper box component hinged to the lower box component for swinging between an opened position and a closed position, the upper box component being coupled to the lower box component at the closed position for covering the diamond, the upper box component exposing the diamond at the opened position; and a light source supported on the lower part or the upper part, the light source emitting an ultraviolet radiation toward the diamond when the upper box component is moved from the closed position. This provides a jewelry box causing a most dramatic impression within an observer of the jewelry box.

Abstract: An ornamental device includes: diamonds disposed on a single support element in a specific physical arrangement, all the diamonds in the specific physical arrangement having a blue fluorescent equal to or stronger than strong blue, wherein all the diamonds in the specific physical arrangement shining clear under a visible light, and shining blue under ultraviolet radiation keeping the specific physical arrangement distinguished from a group of diamonds in the specific physical arrangement, the group of diamonds comprising a mixture of a diamond or diamonds having a blue fluorescence equal to or stronger than strong blue and a diamonds or diamonds not having a blue fluorescent equal to or stronger than strong blue.