Abstract: Provided is an optical member, which is suppressed from causing a reduction in display quality due to wear or a flaw resulting from its vibration while maintaining the excellent characteristics of its low-refractive index layer. The optical member includes: a light guide plate having an end surface that light from a light source enters and an emitting surface from which the entered light is emitted; and a reflective plate bonded to a side of the light guide plate opposite to the emitting surface via a double-sided pressure-sensitive adhesive film. The double-sided pressure-sensitive adhesive film includes a first pressure-sensitive adhesive layer, a low-refractive index layer, and a second pressure-sensitive adhesive layer from the light guide plate side. The optical member further includes a surface-treated layer formed on a side of the reflective plate opposite to the double-sided pressure-sensitive adhesive film.

Abstract: An optical filter is configured to have a regular transmittance of 60% of higher for light having a wavelength of 950 nm. The optical filter is also configured such that in a state in which a light resistance test of irradiating the optical filter for 300 hours with light from a xenon arc lamp having a wavelength not shorter than 300 nm and not longer than 400 nm and a wattage of 120 W/m2 is performed, the optical filter exhibits a change in C* having an absolute value of 6 or smaller between before and after the light resistance test, the C* being measured by the SCE method by use of a spectrophotometer.

Abstract: An electrochromic element includes a first transparent electrode layer, an oxidation color development layer, an electrolyte layer and a second transparent electrode layer in this order. The oxidation color development layer is an oxide layer or a hydroxide layer, and contains nickel as a main component, and metal elements other than nickel. The oxidation color development layer has a thickness of 20 nm or more. The first transparent electrode layer and the oxidation color development layer are in contact with each other. The oxidation color development layer and the electrolyte layer are in contact with each other. The oxidation color development layer includes a near-electrolyte layer and a near-electrode layer. The porosity of the near-electrolyte layer is larger than the porosity of the near-electrode layer.

Abstract: The present disclosure provides an adhesive sheet. The adhesive sheet of the present disclosure comprises a substrate layer and an adhesive layer disposed on at least one surface of the substrate layer, wherein a 180° peel adhesive force to a stainless steel plate, measured when the adhesive sheet is adhered to the stainless steel plate and left at 23° C.×50RH % for 0.5 h, is from 0.1 N to 6 N. The adhesive sheet of the present disclosure has excellent adhesion, flatness and reusability (reworkability), and is easily peelable after use.

Abstract: An impedance matching film 10 includes a mixture containing indium oxide and tin oxide and being a main component of the impedance matching film, the mixture having an amorphous structure. The impedance matching film 10 for impedance matching has a Hall mobility of 5 cm2/(V·s) or more. The impedance matching film 10 has a thickness of 16 nm or more and less than 100 nm.

Abstract: A wiring circuit board includes a first insulating layer, a conductive pattern disposed at one side of the first insulating layer in a thickness direction and having a terminal and a wire connected with the terminal, and a second insulating layer for suppressing release of the terminal from the first insulating layer. The second insulating layer has a first portion disposed at the one side of the first insulating layer in the thickness direction and a second portion disposed at one side of a peripheral edge portion of the terminal in the thickness direction and covering the peripheral edge portion.

Abstract: The present disclosure provides an adhesive sheet. The adhesive sheet in the present disclosure comprises a substrate layer and an adhesive layer provided on at least one surface of the substrate layer. The surface roughness of the adhesive layer is as follows: Ra: 0.2 to 1.5 ?m, preferably 0.4 to 1.0 ?m; Rz: 2.0 to 15.0 ?m, preferably 3.0 to 10.0 ?m, and Ra/Rz is 3.0 to 30.0, preferably 5.0 to 20.0. The adhesive sheet in the present disclosure has excellent adhesion, flatness, and reusability (reworkability) and is easily peelable after use.

Abstract: A method for producing a wiring circuit board includes a region setting step of setting a pattern forming region and an opening forming region in a support layer; an insulating layer forming step of forming a base insulating layer on the support layer in the pattern forming region; a pattern step of forming a conductive pattern having a first conductive layer and a second conductive layer on the base insulating layer; and an etching step of etching the support layer in the opening forming region, and in the pattern step, a dummy pattern is formed in the opening forming region.

Abstract: A reinforcement material includes a resin layer and a restraining layer. The resin layer contains a resin component and a foaming agent, and serves as a reinforcement layer for reinforcing an object. The restraining layer is disposed on the resin layer. The reinforcement layer contains a matrix resin obtained by curing the resin component and a plurality of cells generated by foaming the foaming agent. A ratio of the total area of the plurality of cells in a cross section of the reinforcement layer is 83% or more, and an elastic modulus of the matrix resin of the reinforcement layer is 1.4 GPa or more.

Abstract: An optical cable laying construction set (X) that includes an optical cable (C1) and plugs (P1 and P2). The optical cable (C1) includes an optical fiber which is a refractive index distribution-type plastic optical fiber. The plug (P1) includes a connecting portion connectable to the optical fiber, and an electric connector connectable to an external device, and has a configuration for converting an electric signal into an optical signal. The plug (P2) includes a connecting portion connectable to the optical fiber, and an electric connector connectable to an external device, and has a configuration for converting an optical signal to an electric signal. In an optical cable laying construction method of the present invention, laying construction of the optical cable on site is carried out using the optical cable laying construction set (X).

Abstract: The present invention provides a technology of switching the appearance of a product. A decorative film according to an embodiment of the present invention includes: a light control layer including a first transparent conductive film, a polymer dispersed liquid crystal layer containing a polymer matrix and droplets dispersed in the polymer matrix, the droplets each containing a liquid crystal compound and a dichroic dye, and a second transparent conductive film in the stated order from a viewer side thereof; and a reflective layer arranged on a side of the light control layer opposite to the viewer side.

Abstract: An optical filter is configured to have a regular transmittance of 60% or higher for light having a wavelength of 950 nm. The optical filter is also configured to be contracted by being heated at a temperature of 85° C. or higher, or a size change of the optical filter occurs from room temperature to 300° C. as monotonous increase in a tensile mode of a thermomechanical analyzer (TMA).

Abstract: An optical transmission system converts a first electrical signal into an optical signal, transmits the converted optical signal, and converts the transmitted optical signal into a second electrical signal. The optical transmission system includes an electrooptic conversion device, an optical transmission path, and a photoelectric conversion device. The first electrical signal includes a high-frequency communication signal of above 9 MHz and 10 GHz or less. The optical transmission system further includes an additional signal generating device for generating a low-frequency additional signal having a frequency of 1 Hz or more and 9 MHz or less. The electrooptic conversion device converts the first electrical signal including the additional signal generated in the additional signal generating device and the communication signal into the optical signal.

Abstract: An optical resin composition of the present invention includes fluorine-containing resin and a refractive index modifier. The optical resin composition satisfies the following matter (a) or (b): (a) the refractive index modifier includes 95 mass % or more of a linear polymer (A) including repeating units based on a fluorine-containing ethylene-based monomer such that the number of the repeating units is 5, and a proportion of a content of the linear polymer (A) in the optical resin composition is 1 mass % or more and less than 15 mass %; (b) the refractive index modifier includes 95 mass % or more of a linear polymer (B) including repeating units based on a fluorine-containing ethylene-based monomer such that the number of the repeating units is 6, and a proportion of a content of the linear polymer (B) in the optical resin composition is 1 mass % or more and less than 13 mass %.

Abstract: The present invention provides a technology of switching the appearance of a product. A decorative film according to an embodiment of the present invention includes: a light control layer including a first transparent conductive film, a polymer dispersed liquid crystal layer containing a polymer matrix and droplets dispersed in the polymer matrix, the droplets each containing a liquid crystal compound and a dichroic dye, and a second transparent conductive film in the stated order from a viewer side thereof; and a decorative layer arranged on at least one side of the light control layer.

Abstract: Provided is a method for peeling a PSA sheet adhered on a polarizing plate. The PSA sheet has a PSA layer. The PSA layer includes a layer A forming at least one surface of the PSA layer. Of the polarizing plate, the surface to which the PSA sheet is adhered is corona-treated or plasma-treated. The peeling method includes a water-peel step in which the PSA sheet is peeled from the polarizing plate, in a state where an aqueous liquid exits at the interface between the polarizing plate and the PSA sheet at the front line of peeling the PSA sheet from the polarizing plate, with the aqueous liquid allowed to further enter the interface following the movement of the peel front line.

Abstract: A protective cover member includes a laminate including: a protective membrane having a shape configured to cover an opening when the protective cover member is placed on the face of an object; a substrate film joined to the protective membrane; and a first adhesive layer configured to fix the protective cover member to the face, wherein an outer peripheral surface of the protective cover member has a step in a laminating direction of the laminate, a first portion of the protective cover member protrudes at the step more outward than a second portion of the protective cover member does when the protective cover member is placed on the face, the first portion being positioned farther from the face than the step, the second portion being positioned closer to the face than the step, and the protective membrane and the substrate film are positioned in the first portion.

Abstract: The present disclosure provides a suction fixing sheet to be placed on a suction surface of a suction device to prevent contact between a suction target and the suction surface, the suction fixing sheet including: a porous sheet having air permeability in its thickness direction; and an adhesive layer having air permeability in its thickness direction and disposed on one surface of the porous sheet; wherein the adhesive layer includes a crosslinked adhesive agent, and sucked force obtained for the suction fixing sheet when the sheet area is 100 cm2, the sucked force being measured by a predetermined method, is 450 N or more. The suction fixing sheet of the present invention can suppress a decrease in processing accuracy of a suction target even when the sheet is used under high temperature conditions.

Abstract: A reinforcement structure includes an adherend, such as a metal plate, and a reinforcement sheet adhering thereto. The reinforcement sheet includes a front layer containing a plurality of fibers, a core material layer, and an adhesive layer. The reinforcement structure is capable of intensively reinforcing a first corner portion of the adherend and obtaining an improvement in strength.

Abstract: The head-up display apparatus includes: a display unit configured to output projection light; at least one reflector configured to reflect the projection light; a housing, which has an opening portion, and is configured to store the display unit and the reflector therein; a cover member configured to cover the opening portion; and a polarizing plate with a retardation layer, which is arranged on a housing inner side of the cover member, and includes a retardation layer and a polarizer in the stated order from a cover member side. The retardation layer has an in-plane retardation Re(550) of 3,000 nm or more. The head-up display apparatus is configured so that an angle of reflection of the projection light output from the housing through the opening portion with respect to a windshield is 30° or less, or is 40° or more.