Invention Grant
- Patent Title: Aspheric lens and optical pickup including the same
- Patent Title (中): 非球面透镜和包括其的光学拾取器
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Application No.: US12645989Application Date: 2009-12-23
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Publication No.: US08194522B2Publication Date: 2012-06-05
- Inventor: Bong-gi Kim , Ichiro Morishita , Soo-han Park , Joong-eon Seo
- Applicant: Bong-gi Kim , Ichiro Morishita , Soo-han Park , Joong-eon Seo
- Applicant Address: KR Suwon-si
- Assignee: SAMSUNG Electronics Co., Ltd.
- Current Assignee: SAMSUNG Electronics Co., Ltd.
- Current Assignee Address: KR Suwon-si
- Agency: Stanzione & Kim, LLP
- Priority: KR10-2008-134953 20081226
- Main IPC: G11B7/00
- IPC: G11B7/00
Abstract:
An aspheric lens includes at least one aspheric lens surface, and an angle of inclination on the aspheric lens surface is smaller than or equal to 65°. The aspheric lens surface is given by the equation Z ( r ) = cr 2 1 + 1 - ( 1 + K ) c 2 r 2 + Lr 2 + Ar 4 + Br 6 + Cr 8 + Dr 10 + Er 12 + Fr 14 + Gr 16 + Hr 18 + Jr 20 where L≠0, c is a curvature, r2=x2+y2, K is a conic integer, and L and A through J are aspheric coefficients.
Public/Granted literature
- US20100165821A1 ASPHERIC LENS AND OPTICAL PICKUP INCLUDING THE SAME Public/Granted day:2010-07-01
Information query
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