Nhk Spring Co., Ltd.

Nippon Oil Corporation

Gorou Suzaki

Hidekazu Hoshino

Suzushi Nishimura

Itsuo Takeuchi

Tokio Sakauchi

An identification medium is to be observed via a linearly polarizing filter and includes a first liquid crystal layer that changes the wavelength of light according to the rotational angle of the linearly polarizing filter, a cholesteric liquid crystal layer, and a light absorbing layer that is provided below the cholesteric liquid crystal layer.

Identification medium, identification method, and identification apparatus

An object of the present invention is to provide a discrimination medium which has high discrimination ability, and which is more difficult to counterfeit than conventional discrimination mediums. A discrimination medium comprises: a cholesteric liquid crystal layer; and a liquid crystal layer acting as a half-wave plate and provided on the cholesteric liquid crystal layer in a predetermined pattern.

Discrimination medium comprising a liquid crystal layer acting as a half-wave plate wherein a gradation of gradual or continuous color changes are displayed according to an area

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Yokohama, Japan

Gorou Suzaki