摘要:
Provided is a light-shielding material for use in optical instrument and having a light-shielding sheet with broad low-gloss region while maintaining the physical properties necessary for a light-shielding sheet. The light-shielding material 1 comprises a light-shielding sheet 4 on a substrate 2, and the surface properties of the light-shielding sheet 4 are adjusted so as to fulfill at least one of A1 and A2, and at least one of B1 and B2. A1 is the condition that the arithmetic average roughness Sa in a three-dimensional surface roughness measurement is 0.4 or larger and 2.0 or smaller, A2 is that the ten-point average roughness Sz in a three-dimensional surface roughness measurement is 1 or larger and 20 or smaller. Defining a central plane of projections and recesses in a three-dimensional surface roughness measurement as a reference plane, Pn (n is any positive integer) as the number of projections which protrude to a plane located at a height of n times Se from the reference plane, Pn+1 as the number of projections which protrude to a plane located at a height of (n+1) times Sa, and Rn as the ratio (Pn+1/Pn) of Pn and Pn+1, B1 is the condition that R1 is 55% or greater and R4 is 7% or greater, and B2 is the condition that at least R1 is 55% or greater, R2 is 15% or greater and R3 is 8% or greater.
摘要:
Provided is a method of manufacturing a light-shielding material for use in optical instrument and having a light-shielding coat with a broad low-gloss region while maintaining the physical properties, such as a light-blocking property, necessary for light-shielding coat. In this method for manufacturing a light-shielding material comprising a light-shielding coat formed on the substrate, a coating liquid is prepared containing at least a binder resin, black fine particles and a matting agent having a variation coefficient of 20 or larger. Next, this coating liquid is coated on the substrate and dried to form a light-blocking coat.
摘要:
A binder composition for polyester type films showing superior transparency, film hardness and solvent resistance as well as superior adhesion to polyester type films and an optical film using the composition are provided. The binder composition for polyester type films of the present invention contains a high-molecular weight polymethyl methacrylate (a), an acrylic polyol (b), an isocyanate type curing agent (c), and a polyester resin (d). The optical film of the present invention is an optical film including a polyester type film and a functional layer provided on the polyester type film, the functional layer containing a high-molecular weight polymethyl methacrylate (a), an acrylic polyol (b), an isocyanate type curing agent (c), and a polyester resin (d).
摘要:
An optical film having high light transmittance and excellent light diffusibility is provided. The optical film comprises a transparent substrate 1 and a light diffusion layer 2 formed on one or both sides of the substrate 1. As the resin 3 of the light diffusion layer 2, an ionizing radiation curable resin is used in an amount of, preferably, not less than 50% of the resin and a small amount of the light diffusive agent is dispersed therein. The optical film exhibits excellent light diffusion effect even though the content of the light diffusive agent is small and also exhibits high light transmittance because of the small content of the light diffusive agent. Accordingly, this optical film is suitable for applications such as a color liquid crystal display which is required to have a sufficient brightness, and in combination with another optical material such as a prism lens.
摘要:
There is provided a light diffusive plate and a light guide plate, in which the generation of deflection, a cause of defective imaging, can be prevented.On both surfaces and/or end surfaces of a light diffusive plate 1 made of synthetic resin, a moisture proof layer 2 made of a material having lower vapor permeability than that of the light diffusive plate 1 is formed to produce a light diffusive plate 3. On both surfaces and/or end surfaces of a light guide plate 1 made of synthetic resin, which has at least on end as a light incident surface and a surface almost orthogonal with it as a light emergent surface, a moisture proof layer 2 made of a material having lower vapor permeability than that of the light guide plate 1 is formed to produce a light guide plate 3.
摘要:
A backlight unit does not show decrease of brightness for the frontal direction even when made thin-shaped. An edge light type backlight unit 1 includes a light conducting plate 14, a light source 13 disposed along at least one end portion of the light conducting plate 14, and a light diffusing film 15 disposed on a light projecting surface of the light conducting plate 14. The light conducting plate 14 has a thickness of 1.0 mm or smaller, the light diffusing film 15 has a light diffusing layer formed from a binder resin and a light diffusing agent, wherein the coefficient of variation of particle size distribution of the light diffusing agent is in the range of 30% or smaller.
摘要:
Because light diffusing plates constituting backlight units have high moisture absorbency, light diffusing plates cause deformation such as warp, swell and flexure and adversely affect other members such as liquid crystal cells to cause defective images. A backlight unit that does not generate defective images due to such deformation of light diffusing plate is provided. This backlight unit is a backlight unit 1 comprising light sources 13, a light diffusing plate 14 comprising a synthetic resin and disposed on the light sources, and one or more kinds of optical members 15 and 16 for backlight unit disposed on the light diffusing plate, wherein both surfaces of the light diffusing plate 14 shall have an arithmetical mean deviation (Ra) of 0.1 μm or less according to JIS B0601:1994.
摘要:
A light control film comprising a downward prism sheet and a light diffusing sheet having a rough surface as a surface facing the downward prism sheet, which solves the problem of mutual scratching of constituent members. The light control sheet of the present invention comprises at least a light diffusing film and a prism sheet disposed as a laminate. One surface of the light diffusing film is a light diffusing surface, and the other surface is a rough surface. One surface of the prism sheet is a prism surface, and the other surface is a smooth surface. The smooth surface is constituted by a smooth layer containing at least a comb polymer. By this configuration, the facing surfaces comes to be hardly scratched, in spite of the structure in which the rough surface of the light diffusing film and the smooth surface of the prism sheet are disposed to face each other.
摘要:
A light diffusion composite comprises a first prism sheet, a second prism sheet and a light diffusion material disposed in this order from the light emitting surface. The light diffusion material comprises a transparent support and a light diffusion layer formed on the support. The light diffusion layer comprises an acrylic resin as a binder resin and light diffusion agents including acrylic resin particles and silicone resin particles. The light diffusion composite has better luminance in the front direction than the conventional light diffusion sheet and also has good light diffusibility.
摘要:
Provided is a light-shielding material for use in optical instrument and having a light-shielding sheet with broad low-gloss region while maintaining the physical properties necessary for a light-shielding sheet. The light-shielding material 1 comprises a light-shielding sheet 4 on a substrate 2, and the surface properties of the light-shielding sheet 4 are adjusted so as to fulfill at least one of A1 and A2, and at least one of B1 and B2. A1 is the condition that the arithmetic average roughness Sa in a three-dimensional surface roughness measurement is 0.4 or larger and 2.0 or smaller, A2 is that the ten-point average roughness Sz in a three-dimensional surface roughness measurement is 1 or larger and 20 or smaller. Defining a central plane of projections and recesses in a three-dimensional surface roughness measurement as a reference plane, Pn (n is any positive integer) as the number of projections which protrude to a plane located at a height of n times Sa from the reference plane, Pn+1 as the number of projections which protrude to a plane located at a height of (n+1) times Sa, and Rn as the ratio (Pn+1/Pn) of Pn and Pn+1, B1 is the condition that R1 is 55% or greater and R4 is 7% or greater, and B2 is the condition that at least R1 is 55% or greater, R2 is 15% or greater and R3 is 8% or greater.