| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical pickup device which is less likely to change the reflected colors of an antireflection film and has high reliability, even when there is variations in film thickness to some extent, by applying appropriate improvements in the antireflection film of an optical element, such as an aberration correcting element. <P>SOLUTION: The antireflection film is disposed in the aberration correcting element as a component of the optical pickup device, wherein the reflectances of the light beam at 658 nm and 780 nm are 3% or lower and the reflectance of light beam at a wavelength 405 nm is 7 to 20%. <P>COPYRIGHT: (C)2008,JPO&INPIT |
