Phase-shifting apodizer for next-generation digital versatile disk

Haifeng Wang; Zhongyu Chen; Fuxi Gan

doi:10.1117/1.1367349

1 June 2001 Phase-shifting apodizer for next-generation digital versatile disk

Haifeng Wang, Zhongyu Chen, Fuxi Gan

Optical Engineering, Vol. 40, Issue 6, (June 2001). https://doi.org/10.1117/1.1367349

The next generation digital versatile disk (DVD) using blue lasers will have a capacity of 13 to 15 Gbytes. Compared with current DVD, the wavelength will be shorter and the numerical aperture (NA) will be higher. But with the increase of NA and decrease of wave length, the depth of focus (DOF) decrease rapidly, which makes it hard for the servo-system to track. We propose an optimized three-portion phaseshifting 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 result shows that an optical system with this apodizer also has a good defocus characteristic.

©(2001) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Haifeng Wang, Zhongyu Chen, and Fuxi Gan "Phase-shifting apodizer for next-generation digital versatile disk," Optical Engineering 40(6), (1 June 2001). https://doi.org/10.1117/1.1367349

Published: 1 June 2001

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