Invention Grant
US07643395B2 Diffraction element and optical pick-up apparatus having the same
有权
具有该衍射元件和光学拾取装置的衍射元件
- Patent Title: Diffraction element and optical pick-up apparatus having the same
- Patent Title (中): 具有该衍射元件和光学拾取装置的衍射元件
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Application No.: US11254700Application Date: 2005-10-21
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Publication No.: US07643395B2Publication Date: 2010-01-05
- Inventor: Bong-gi Kim , Seong-su Park , Jung-woo Hong
- Applicant: Bong-gi Kim , Seong-su Park , Jung-woo Hong
- Applicant Address: KR Suwon-si
- Assignee: Samsung Electronics Co., Ltd.
- Current Assignee: Samsung Electronics Co., Ltd.
- Current Assignee Address: KR Suwon-si
- Agency: Roylance, Abrams, Berdo & Goodman, L.L.P.
- Priority: KR10-2005-0005108 20050119
- Main IPC: G11B7/00
- IPC: G11B7/00
Abstract:
A diffraction element for an optical pick-up apparatus is capable of precisely controlling the tracking of the pick-up apparatus. The diffraction element includes a diffraction grating divided into a first, a second, and a third region. The second region is located between the first and third regions. Any one of the first region and the third region is inclined at a predetermined angle θ with respect to the second region.
Public/Granted literature
- US20060158989A1 Diffraction element and optical pick-up apparatus having the same Public/Granted day:2006-07-20
Information query
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