论文信息 - Phase-shifting apodizer for next-generation digital versatile disk

Phase-shifting apodizer for next-generation digital versatile disk

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 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 result shows that an optical system with this apodizer also has a good defocus characteristic. (C) 2001 Society of Photo-Optical Instrumentation Engineers.

Fuxi Gan | Z. Y. Chen | Haifeng Wang

[1] W. Welford. Use of Annular Apertures to Increase Focal Depth , 1960 .

[2] Yoshitsugu Araki,et al. The Path from a Digital Versatile Disc (DVD) using a Red Laser to a DVD using a Blue Laser , 1998 .

[3] T R Sales,et al. Fundamental limits of optical superresolution. , 1997, Optics letters.

[4] M. Katsumura,et al. HIGH DENSITY MASTERING USING ELECTRON BEAM , 1998 .

[5] Guoguang Yang,et al. An optical pickup using a diffractive optical element for a high-density optical disc , 1999 .

[6] G. Michael Morris,et al. DIFFRACTIVE SUPERRESOLUTION ELEMENTS , 1997 .

[7] Hideo Ando,et al. Phase-Shifting Apodizer of Three or More Portions : Head Technology , 1992 .

[8] T. Iida,et al. High-Density Optical Disc Mastering Using Photobleachable Dye , 1998 .