Dynamic focus control of the Blu-ray optical pickup unit

被引:1
作者
Cheng, Xuemin [1 ]
Ma, Jianshe [1 ]
Hao, Qun [2 ]
机构
[1] Tsinghua Univ, Grad Sch Shenzhen, Beijing 518055, Peoples R China
[2] Beijing Inst Technol, Beijing 100081, Peoples R China
来源
OPTICAL DESIGN AND ENGINEERING III, PTS 1 AND 2 | 2008年 / 7100卷
关键词
Zoom lens; Deformable mirror; Dynamic focus control; Blu-ray; Optical pickup unit;
D O I
10.1117/12.797692
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The collimator in BD/DVD/CD compatible optical pickup unit has been designed to motivate and translate along the optical axis by the motor, for multi kinds of disc compatibilities of spherical aberration compensation incurred when reading and writing. The driving motor is huge and not easy to activate. Another technical obstacle to be handled is the alignment so that the reflective mirror should be adjusted and rotated along two axes. In this paper, this kind of optical pickup unit might be minimized, and realize dynamic focus control by micro machined deformable mirror. The optimal sensitivity should be achieved when the focusing spot size is equal to the diffraction limited diameter of the focal spot of the reflected beam.
引用
收藏
页数:8
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