发明名称 |
Light source apparatus provided with beam shaping element and optical pick-up apparatus having the same |
摘要 |
The present invention has a beam shaping element for converting the light source 11 into a light flux whose emitting angle is almost equal and for projecting it, and a generation amount of the astigmatism generated by the temperature change is suppressed by a linear expansion of the beam shaping element.
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申请公布号 |
US7558180(B2) |
申请公布日期 |
2009.07.07 |
申请号 |
US20050532602 |
申请日期 |
2005.04.25 |
申请人 |
KONICA MINOLTA OPTO, INC. |
发明人 |
SAKAMOTO KATSUYA;HASHIMURA JUNJI |
分类号 |
G11B7/135;G02B13/00;G02B13/18;G02B27/00 |
主分类号 |
G11B7/135 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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