Near-field readout system for a high-density optical ROM disc

Tsutomu Ishimoto; Kimihiro Saito; Takao Kondo; Ariyoshi Nakaoki; Masanobu Yamamoto

doi:10.1117/12.453438

10 January 2002 Near-field readout system for a high-density optical ROM disc

Tsutomu Ishimoto, Kimihiro Saito, Takao Kondo, Ariyoshi Nakaoki, Masanobu Yamamoto

Proceedings Volume 4342, Optical Data Storage 2001; (2002) https://doi.org/10.1117/12.453438
Event: Optical Data Storage, 2001, Santa Fe, NM, United States

Abstract

We developed a near field readout system for an optical ROM disc with a GaN laser diode and a 1.4-effective-NA objective lens. We read out a 25 Gbyte optical ROM disc using a gap servo and a tracking servo in the near field read system, and experimentally confirmed an effective NA of 1.4.

Citation Download Citation

Tsutomu Ishimoto, Kimihiro Saito, Takao Kondo, Ariyoshi Nakaoki, and Masanobu Yamamoto "Near-field readout system for a high-density optical ROM disc", Proc. SPIE 4342, Optical Data Storage 2001, (10 January 2002); https://doi.org/10.1117/12.453438

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