Patent ID: 7457224
Filing Date: 2008-11-25
Classification: G11B

Abstract:
1. An optical pickup apparatus for conducting information recording and/or reproducing and to converge laser light beams having a plurality of wavelengths including a wavelength of λ 1 (390 nm≦λ 1 ≦430 nm) and a wavelength λ 2 (630 nm≦λ 2 ≦670 nm) onto information recording media, comprising: one or more of optical element main bodies; and an antireflective film which is arranged on at least one surface on the optical element main bodies and on which an optical functional surface is formed, wherein, when the optical functional surface and a first laser beam having the wavelength λ where R wherein, when the optical functional surface and a second laser beam having the wavelength λ where R