Phase-shifting apodizer for next-generation DVD

Haifeng Wang; Zhongyu Chen; Fuxi Gan

doi:10.1117/12.416856

7 February 2001 Phase-shifting apodizer for next-generation DVD

Haifeng Wang, Zhongyu Chen, Fuxi Gan

Proceedings Volume 4085, Fifth International Symposium on Optical Storage (ISOS 2000); (2001) https://doi.org/10.1117/12.416856
Event: Fifth International Symposium on Optical Storage (IS0S 2000), 2000, Shanghai, China

Abstract

The next generation digital versatile disk (DVD) which uses blue laser will have a capacity of 13 Gbytes to 15 Gbytes. Compared with the current DVD, the wavelength will be shorter and the NA will be higher. But with the increase of NA and decrease of wavelength, the depth of focus (DOF) decreases rapidly, which makes it hard to track by the servo-system. In this paper, we propose to use an optimized three-portion phase-shifting apodizer to increase the depth of focus and at the same time minimize the spot size, which makes the DOF of next generation DVD comparable to current DVD. The simulation results show that an optical system with this apodizer also has a good defocusing characteristic.

Citation Download Citation

Haifeng Wang, Zhongyu Chen, and Fuxi Gan "Phase-shifting apodizer for next-generation DVD", Proc. SPIE 4085, Fifth International Symposium on Optical Storage (ISOS 2000), (7 February 2001); https://doi.org/10.1117/12.416856

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