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发明名称
光学拾取装置及使用该光学拾取装置之光学资讯处理装置
摘要
本发明揭示一光学拾取装置。在此光学拾取装置中,来自DVD光源或CD光源的S偏振光输入至偏振滤光镜。由于偏振滤光镜透射S偏振光且绕射P偏振光,故S偏振光透射偏振滤光镜。藉由绕射元件的绕射,S偏振光转换为三光束。在偏振分光器处所反射的三光束,经准直透镜藉由1/4波长板转换为圆偏振光,而该圆偏振光经由物镜聚集于光学记录媒体。由光学记录媒体所反射的光经物镜藉由1/4波长板转换为P线偏振光。基本上几乎全部的P偏振光透射偏振分光器。少量返回光行进至光源侧。
申请公布号
TWI389115
申请公布日期
2013.03.11
申请号
TW098108302
申请日期
2009.03.13
申请人
理光股份有限公司 日本
发明人
平井秀明
分类号
G11B7/135
主分类号
G11B7/135
代理机构
代理人
洪尧顺 台北市内湖区行爱路176号3楼
主权项
地址
日本
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