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Proceedings Paper

Micro lens actuator and polymer objective lens for optical pickup
Author(s): Pei Li; Longfa Pan; Hans Zappe
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Paper Abstract

Lens actuator is one of the most important components in an optical pickup system, which decides the performance of the disc readout system. A significant advance in technical capability has recently been achieved in the fabrication of integrated micro lens actuators of optical pickup by microelectromechanical systems (MEMS) technology. A comb-drive tracking and focusing integrated lens actuator fabricated on a silicon-on-insulator (SOI) wafer has been reported. Twodimensional tuning of the objective lens is generated by the integrated comb structures. Large displacements of about ±24.6μm in tracking direction and 5.7μm in focusing direction are demonstrated. The device has a high sensitivity and an ignorable coupling between the two dimensional driving movements. The small-form-factor device provides an excellent performance and size reduction. Furthermore, high quality polymer micro-lenses with high numerical aperture (NA) are fabricated on a pre-patterned hydrophobic glass substrate by liquid dispensing. The surface profiles are adjusted by the patterned diameter and the volume of the dispensed polymer, which is controlled by the dispensing time. This extremely low cost, high NA and easily fabricated lens represents an important step for further integration of the pickup system, thus expands the application area of optical storage.

Paper Details

Date Published: 24 January 2013
PDF: 5 pages
Proc. SPIE 8782, 2012 International Workshop on Information Storage and Ninth International Symposium on Optical Storage, 87820W (24 January 2013); doi: 10.1117/12.2014720
Show Author Affiliations
Pei Li, Tsinghua Univ. (China)
Longfa Pan, Tsinghua Univ. (China)
Hans Zappe, Albert-Ludwigs-Univ. Freiburg (Germany)

Published in SPIE Proceedings Vol. 8782:
2012 International Workshop on Information Storage and Ninth International Symposium on Optical Storage
Fuxi Gan; Zhitang Song, Editor(s)

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