Invention Grant
- Patent Title: Optical pickup
- Patent Title (中): 光学拾音
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Application No.: US13079872Application Date: 2011-04-05
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Publication No.: US08422343B2Publication Date: 2013-04-16
- Inventor: Souichirou Yamada , Jun Hato , Katsuhiko Kimura , Yoshitaka Kusano
- Applicant: Souichirou Yamada , Jun Hato , Katsuhiko Kimura , Yoshitaka Kusano
- Applicant Address: JP Iwate
- Assignee: Hitachi Media Electronics Co., Ltd.
- Current Assignee: Hitachi Media Electronics Co., Ltd.
- Current Assignee Address: JP Iwate
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2010-086995 20100405
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
In an optical pickup for use in an optical disc device, wire rods are wound directly around a lens-coil holder to make tracking coils and focus coils. The lens-coil holder is divided into three holders, one of which holds an optical lens thereon and has on its sides wire-winding protrusions for wiring wire rods therearound to make tracking coils. The remaining holders have focus coils that are wound therearound. Alternatively, the lens-coil holder is divided into two holders, one of which has on its sides wire-winding protrusions for wiring wire rods therearound to make tracking coils. The remaining holder holds an optical lens thereon and has focus coils that are wound therearound. The lens-coil holder has a cavity for letting pass through a laser beam emitted in parallel to an optical disc surface.
Public/Granted literature
- US20110247021A1 OPTICAL PICKUP Public/Granted day:2011-10-06
Information query
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