Dai Nippon Printing Co., Ltd.

Seika Minakoshi

Gen Furui

Yukimitsu Iwata

Junya Eguchi

Shoichiro Ogumi

Kenji Ueno

Syouichirou Ogumi

Hiroyuki Takamiya

Provided are: an optical film, wherein interference fringes can be suppressed from being generated, cloudiness is not observed, and a manufacture cost can be reduced. In accordance with one aspect of the present invention, there is provided an optical filmincluding a functional layer, wherein the functional layerhas a concavo-convex surfaceA; and in a state in which the concavo-convex surfaceA is irradiated with parallel light travelling in a direction sloped at 10&#xb0; with respect to a normal direction N of the optical film, in an angle distribution of reflected light intensities measured in a plane including both directions of the normal direction N and the travelling direction T of the parallel light, a value obtained by subtracting &#xbd; angle width from 1/100 angle width is 0.7&#xb0; or more and 1.4&#xb0; or less.

Optical film, polarizing plate, liquid crystal panel, and image display apparatus

An optical film, a polarizing plate, a liquid crystal panel, and an image display apparatus are provided, wherein interference fringes can be made to be invisible, and cloudiness can be reduced. In accordance with one aspect of the present invention, an optical film is provided, including a light transmissive substrate, and a functional layer disposed on the light transmissive substrate, wherein the functional layer has a concavo-convex surface forming a surface of the optical film. Assuming that a slope angle of the concavo-convex surface with respect to a film plane of the optical film in a cross section along a direction normal to the film plane is a surface angle, a percentage of a region in which the surface angle is 0.05&#xb0; or more is 50 % or more in the concavo-convex surface, and the root mean square slope R&#x394;q of a roughness curve on the concavo-convex surface is 0.003 or less.

A touch panel which prevents Newton ring formation and glare, shows high transmission image clarity, prevents haze and has high visibility, and an optical film which is applicable to such a touch panel. An optical film comprising an optically-transparent substrate and at least one hard coat layer (A) disposed on a surface of the optically-transparent substrate, wherein a surface of the hard coat layer (A), which is opposite to a surface where the optically-transparent substrate is present, has an arithmetic mean roughness (Ra) defined in JIS B0601 (1994) of 0.025 to 0.05 &#x3bc;m, and has 10 to 250 convex portions each having a height of 0.3 to 3 &#x3bc;m in a 1.08 mm square area.

Optical film and touch panel

Provided is an optical layered body which sufficiently suppresses generation of interference fringes and curls, can make a hard coat layer thin, and prevent an increase in production cost. Provided is an optical layered body having a hard coat layer formed on one surface of a light-transmitting substrate, wherein the hard coat layer has a surface roughness on its surface and the surface roughness satisfies the following inequalities of &#x3b8;a and Kr where &#x3b8;a is an average inclination angle of the uneven part and Kr is Kurtosis of the unevenness:0.01&#xb0;&#x2266;&#x3b8;a&#x2267;0.10&#xb0;1&#x2266;Kr&#x2266;3.

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Tokyo, Japan

Seika Minakoshi