Abstract: An optical device includes a diffusion film including a diffusion film and a condensing film. The diffusion film includes a diffusion layer that exhibits adhesive property and that has a light-incident surface and a light-emitting surface. The light-emitting surface is disposed oppositely of the light-incident surface and having a first microstructure. The condensing film includes a light-transmissive base layer that is adhered onto the light-emitting surface, and a prism layer provided on the light-transmissive base layer opposite to the diffusion film.

Abstract: An optical prism sheet includes a transparent substrate having a light-entrance surface, and a plurality of elongated prisms that protrude from the transparent substrate. Each of the prisms has a scalene triangular cross-section and first and second surfaces that intersect each other to define an apex angle. The apex angle of each of the prisms is divided by a normal line of the transparent substrate into first and second sub-angles that are different from each other. At least one of the light-entrance surface and the first and second surfaces of each of the prisms is roughened to form a plurality of micro-protrusions, each of which has a height ranging from 0.1 ?m to 5 ?m.

Abstract: An optical thin film includes: a transparent substrate including a first surface and a second surface which is opposite to the first surface; a first light-condensing layer formed on the first surface of the transparent substrate, the first light-condensing layer having a haze value ranging from 5% to 30% and a surface roughness ranging from 0.1 RMS to 1 RMS; and a second light-condensing layer formed on the second surface of the transparent substrate. The second light-condensing layer has a haze value ranging from 70% to 100% and a surface roughness ranging from 1 RMS to 10 RMS.

Abstract: An optical thin film includes: a transparent substrate including a first surface and a second surface which is opposite to the first surface; a first light-condensing layer formed on the first surface of the transparent substrate, the first light-condensing layer having a haze value ranging from 5% to 30% and a surface roughness ranging from 0.1 RMS to 1 RMS; and a second light-condensing layer formed on the second surface of the transparent substrate. The second light-condensing layer has a haze value ranging from 70% to 100% and a surface roughness ranging from 1 RMS to 10 RMS.

Abstract: A method for making a prismatic laminate includes the steps of: a) forming a back-coating roller having a roller surface with a plurality of recesses arranged in a predetermined pattern and produced by laser holography; b) preparing a prismatic structure including a plate body having a first surface and a second surface opposite to the first surface, and a plurality of prismatic strips formed on the first surface of the plate body; c) applying a coating containing a resin component and an antistatic agent on the second surface of the plate body; and d) embossing the coating with the back-coating roller to form an optical layer including a plurality of microstructures protruding in a direction away from the second surface of the plate body and having a pattern corresponding to that of the recesses in the roller surface.

Abstract: A method for making a prismatic laminate includes the steps of: a) forming a back-coating roller having a roller surface with a plurality of recesses arranged in a predetermined pattern and produced by laser holography; b) preparing a prismatic structure including a plate body having a first surface and a second surface opposite to the first surface, and a plurality of prismatic strips formed on the first surface of the plate body; c) applying a coating containing a resin component and an antistatic agent on the second surface of the plate body; and d) embossing the coating with the back-coating roller to form an optical layer including a plurality of microstructures protruding in a direction away from the second surface of the plate body and having a pattern corresponding to that of the recesses in the roller surface.

Abstract: One face of a substrate of a diffuser with a light condensing function is disposed with a plurality of prism rods; at least one inclined face of parts of prism rods is disposed with a rough diffusion face; the diffusion face may be positioned on any position of the inclined face of the prism rod; the diffusion face is disposed with a plurality of irregularly arranged raised and indented stripes perpendicular, not perpendicular or parallel to a crest line of the prism rod; chromatid dispersion can be reduced and stripes of the prism rods can be atomized effectively by utilizing the diffusion face to eliminate the occurrence of moiré fringes and elevate the yield factor.

Abstract: One face of a substrate of a diffuser with a light condensing function is disposed with a plurality of prism rods; at least one inclined face of parts of prism rods is disposed with a rough diffusion face; the diffusion face may be positioned on any position of the inclined face of the prism rod; the diffusion face is disposed with a plurality of irregularly arranged raised and indented stripes perpendicular, not perpendicular or parallel to a crest line of the prism rod; chromatid dispersion can be reduced and stripes of the prism rods can be atomized effectively by utilizing the diffusion face to eliminate the occurrence of moiré fringes and elevate the yield factor.

Abstract: An optical sheet is adapted for diffusing and converging light, and includes a light-transmissive base layer, a prism layer, and a plurality of diffusion regions. The base layer has a first surface and a second surface that is opposite to the first surface. The prism layer is provided on the first surface of the base layer and has a plurality of prisms, each of which has a peak and two inclined surfaces that meet at the peak. At least two of the peaks of the prisms are different in height. The diffusion regions are disposed on the inclined surfaces of the prisms. Each of the diffusion regions is in the form of a roughened surface.

Abstract: One face of a substrate of a diffuser with a light condensing function is disposed with a plurality of prism rods; at least one inclined face of parts of prism rods is disposed with a rough diffusion face; the diffusion face may be positioned on any position of the inclined face of the prism rod; the diffusion face is disposed with a plurality of irregularly arranged raised and indented stripes perpendicular, not perpendicular or parallel to a crest line of the prism rod; chromatic dispersion can be reduced and stripes of the prism rods can be atomized effectively by utilizing the diffusion face to eliminate the occurrence of moiré fringes and elevate the yield factor.

Abstract: An optical film with a surface structure includes one surface of a substrate comprising a plurality of light control elements with their longitudinal axes arranged approximately parallel to each other, in which each element includes an independent peak formed by two inclined faces and the two inclined faces between each two independent peaks are connected to each other to form an independent valley; heights of the independent peaks are periodically varied; a virtual connecting line of summits of the independent peaks varied from high to low or from low to high is a straight line, a spacing interval between the independent valleys is varied in a geometric ratio with the height of the independent peak.