| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wideband wavelength plate (retardation plate) usable as a wavelength plate for an optical information recording reproducing device by stabilizing for heat and humidity, and making a plurality of laser lights with different wavelengths effective. <P>SOLUTION: The laminated wavelength plate mutually adheres a ring-like olefin, based a resin film in the range of 5-5,000 nm of a phase difference with respect to a light of 550 nm of wavelength and an anisotropic crystal plate, such as quartz. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
