Optical pickup apparatus
AssigneesSanyo Electric Co., Ltd., Sanyo Optec Design Co., Ltd.
InventorsTohru Hotta, Ryoichi Kawasaki
Life of this patent
Estimating the term…
Abstract
An optical pickup apparatus comprising: a first objective lens; and a second objective lens arranged with the first objective lens in a radial direction of an optical disc, the first objective lens being configured to focus laser light for reproduction, which is laser light for reproducing a signal recorded in a signal recording layer of the optical disc, onto the signal recording layer, the second objective lens being configured to focus laser light for recording, which is laser light for recording a signal, onto the signal recording layer.
Claims16
An optical pickup apparatus comprising:
- a first objective lens;
- and
- a second objective lens arranged with the first objective lens in a radial direction of an optical disc,
- the first objective lens being configured to focus laser light for reproduction, which is laser light for reproducing a signal recorded in a signal recording layer of the optical disc, onto the signal recording layer,
- the second objective lens being configured to focus laser light for recording, which is laser light for recording a signal, onto the signal recording layer.
An optical pickup apparatus comprising:
- a first objective lens;
- and
- a second objective lens arranged with the first objective lens in a radial direction of a first optical disc and a second optical disc,
- when a first laser light having a first wavelength is emitted, the first objective lens being configured to focus laser light for reproduction obtained from the first laser light onto a first signal recording layer of the first optical disc so as to reproduce a signal recorded in the first signal recording layer, and the second objective lens being configured to focus laser light for recording obtained from the first laser light onto the first signal recording layer so as to record a signal, and
- when a second laser light having a second wavelength different from the first wavelength is emitted, the first objective lens being configured to focus the second laser light onto a second signal recording layer of the second optical disc so as to reproduce a signal recorded in the second signal recording layer or record a signal.
Dependencies are inferred from the claim text.