发明授权
US08322753B2 Identification medium, identification method, and identification apparatus 有权
识别介质,识别方法和识别装置

Identification medium, identification method, and identification apparatus
摘要:
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.
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