Optical element having an anti-reflection film and optical...

Details Optical element having an anti-reflection film and optical... Optical element having an anti-reflection film and optical...

2004-06-25

2008-11-25

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112010

Reexamination Certificate

active

07457224

ABSTRACT:
An optical element to be arranged in 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 λ1onto information recording media, includes 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 λ1makes an angle θ1in the range of 0°≦θ1≦60°, the optical element satisfies |Rp1−Rs1|≦2% where Rp1and Rs1are respectively P polarized light and S polarized light reflectivities of the first laser light on the optical functional surface.

REFERENCES:
patent: 5579159 (1996-11-01), Ito
patent: 6243203 (2001-06-01), Schleipen et al.
patent: 6574039 (2003-06-01), Murata et al.
patent: 6768581 (2004-07-01), Yip et al.
patent: 2003/0103271 (2003-06-01), Ohta
patent: 2003/0123334 (2003-07-01), Fujimaki et al.
patent: 10-160906 (1998-06-01), None
patent: 2001-052366 (2001-02-01), None

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