Pneumatic sensing system used for focusing in multiwavelength optical disc mastering

Qicheng Zhang; Kun Qian; Duanyi Xu; Guosheng Qi; Hua Hu

doi:10.1117/12.570354

3 January 2005 Pneumatic sensing system used for focusing in multiwavelength optical disc mastering

Qicheng Zhang, Kun Qian, Duanyi Xu, Guosheng Qi, Hua Hu

Proceedings Volume 5643, Advances in Optical Data Storage Technology; (2005) https://doi.org/10.1117/12.570354
Event: Photonics Asia, 2004, Beijing, China

Abstract

In order to meet the requirement of focusing in the multi-wavelength mastering system, a pneumatic sensing system is designed. It detects the objective lens position signals and sends to the focus control system as the focus error signals instead of the feedback signals of light intensity used traditionally. So it can solve the auto-focus problem caused by introducing multi-wavelength lasers. The static and frequency response characteristics of the system are tested. It is proved by the experiment that the focus error is under ±0.1μm and can meet the needs of the three-wavelength system.

Citation Download Citation

Qicheng Zhang, Kun Qian, Duanyi Xu, Guosheng Qi, and Hua Hu "Pneumatic sensing system used for focusing in multiwavelength optical disc mastering", Proc. SPIE 5643, Advances in Optical Data Storage Technology, (3 January 2005); https://doi.org/10.1117/12.570354

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