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Applied Optics

Applied Optics


  • Vol. 38, Iss. 17 — Jun. 10, 1999
  • pp: 3778–3786

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  »View Author Affiliations

Applied Optics, Vol. 38, Issue 17, pp. 3778-3786 (1999)

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A dual-wavelength optical head, believed to be new in design, for 0.6- and 1.2-mm-thick-substrate optical disks was developed by use of 650- and 780-nm-wavelength light and a wavelength-selective filter, which reduces the spherical aberration that is due to the difference in substrate thicknesses and restricts the numerical aperture for 780-nm-wavelength light. According to this configuration, both high light power efficiency and wide image field characteristics are obtained, which are suitable not only for read-only but also for recordable or rewritable optical disk systems. A reading operation for a digital video disc and for a compact disc and a recording operation for a phase change optical disk were successfully demonstrated.

© 1999 Optical Society of America

OCIS Codes
(210.4590) Optical data storage : Optical disks
(220.1000) Optical design and fabrication : Aberration compensation

Original Manuscript: October 15, 1998
Revised Manuscript: March 2, 1999
Published: June 10, 1999

Ryuichi Katayama, Yuichi Komatsu, and Yutaka Yamanaka, "Dual-wavelength optical head with a wavelength-selective filter for 0.6- and 1.2-mm-thick-substrate optical disks," Appl. Opt. 38, 3778-3786 (1999)

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