Abstract

Compatibility with Digital Versatile Disc and Compact Disc has been demonstrated for two options of high-density optical disk systems using a blue laser diode. Option 1 (HD DVD) employs a 0.65 numerical aperture objective lens and a $0.6\mathrm{mm}$ thick protective layer disk, while Option 2 (Blu-ray Disc) employs a 0.85 numerical aperture objective lens and a $0.1\mathrm{mm}$ thick protective layer disk. An optical head has three laser diodes whose wavelengths are $405\mathrm{nm}$, $660\mathrm{nm}$, and $785\mathrm{nm}$. A spherical aberration caused by the difference in the protective layer thickness of the disk is corrected by an objective lens magnification change, while the numerical aperture of the objective lens is controlled by a wavelength-selective aperture. Experimental results have shown that Option 1 is more preferable, but Option 2 is also acceptable from the viewpoint of the compatibility.

© 2008 Optical Society of America

Dual-wavelength optical head with a wavelength-selective filter for 0.6- and 1.2-mm-thick-substrate optical disks

Ryuichi Katayama, Yuichi Komatsu, and Yutaka Yamanaka
Appl. Opt. 38(17) 3778-3786 (1999)

Terabyte recorded in two-photon 3D disk

Ed Walker, Alexander Dvornikov, Ken Coblentz, and Peter Rentzepis
Appl. Opt. 47(22) 4133-4139 (2008)

Compact description of substrate-related aberrations in high numerical-aperture optical disk readout

Sjoerd Stallinga
Appl. Opt. 44(6) 849-858 (2005)

Analysis of the effects of disk tilt on the differential-phase-detection signal in a high-density DVD read-only disk driver

Quanhong Shen and Duanyi Xu
Appl. Opt. 45(17) 3998-4004 (2006)

Substrate thickness error and radial tilt detection using a five-beam optical head

Ryuichi Katayama and Yuichi Komatsu
Appl. Opt. 48(11) 2014-2026 (2009)