| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical member hardly causing yellowing due to ultraviolet irradiation. <P>SOLUTION: The optical member 1 comprises: a pair of transparent substrates 2a and 2b including at least one transparent substrate 2a formed with an optical multilayered film 3; and an optical anisotropic material layer 5 formed by forming orientation films 4a and 4b on the surfaces in contact with a liquid crystal, to the transparent substrates 2a and 2b, by holding a polymerized liquid crystal composition between the orientation films 4a and 4b, and by irradiating the liquid crystal composition with light of 360-410 nm wavelengths to perform photopolymerization. The optical multilayered film 3 has functions for cutting ultraviolet rays of 320 nm wavelength or less yellowing the optical anisotropic material layer 5, transmitting ultraviolet lays of 360-410 nm wavelengths necessary for polymerizing or curing the polymerizable liquid crystal composition or a photo-polymerizable adhesive, and preventing reflection of light of a wavelength of 405 nm band. This optical member is suitably used for an optical head device using a blue laser. <P>COPYRIGHT: (C)2010,JPO&INPIT |
