Zeon Corporation

Kazuhiro Oosato

Taku Hatano

Masakazu Saito

Masashi Aimatsu

An optically anisotropic layered body including a first optically anisotropic layer and a second optically anisotropic layer, wherein in-plane retardations Re(H450), Re(H550), Re(H590), and Re(H650) of the first optically anisotropic layer at wavelengths of 450 nm, 550 nm, 590 nm, and 650 nm, respectively, and in-plane retardations Re(Q450), Re(Q550), Re(Q590), and Re(Q650) of the second optically anisotropic layer at wavelengths of 450 nm, 550 nm, 590 nm, and 650 nm, respectively, satisfy specific requirements.

Optically anisotropic laminate, circularly polarizing plate, and image display device

A long-length circularly polarizing plate including: a polarizing film; a &#x3bb;/2 plate having a slow axis in a direction forming an angle of 22.5&#xb0;&#xb1;10&#xb0; relative to an absorption axis of the polarizing film; and a plate having a slow axis in a direction forming an angle of 90&#xb0;&#xb1;20&#xb0; relative to an absorption axis of the polarizing film, in this order, wherein the &#x3bb;/2 plate and the &#x3bb;/4 plate have different wavelength dispersions, and an NZ factor of the &#x3bb;/4 plate NZq satisfies NZq&#x2264;0.0.

Elongated circularly polarizing plate, elongated broadband lambda/4 plate, organic electroluminescent display device, and liquid crystal display device

A circularly polarizing plate includes: a polarizing film; a &#x3bb;/2 plate having a slow axis in a direction forming an angle of 15&#xb0;&#xb1;5&#xb0; with respect to an absorption axis of the polarizing film; and a &#x3bb;/4 plate having a slow axis in a direction forming an angle of 75&#xb0;&#xb1;5&#xb0; with respect to the absorption axis of the polarizing film, which are provided in this order. A wavelength dispersion of the &#x3bb;/2 plate and a wavelength dispersion of the &#x3bb;/4 plate approximately coincide with each other. A refractive index of one of the &#x3bb;/2 plate and the &#x3bb;/4 plate is nz&#x2265;nx&#x3e;ny, and a refractive index of the other of the &#x3bb;/2 plate and the &#x3bb;/4 plate is nx&#x3e;ny&#x2265;nz, where nx, ny and nz represent refractive indices in in-plane slow axis, in-plane fast axis, and thickness directions, respectively.

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Tokyo, Japan

Kazuhiro Oosato