An optical flying head for a near-field recording system

Takeshi Mizuno, Taro Hitosugi, Naoto Kojima, Shigeru Yamazaki, Kageyasu Sako, Kenjiro Watanabe

    Research output: Contribution to journalConference articlepeer-review

    3 Citations (Scopus)


    We report a novel optical head based on the combination of a solid immersion lens (SIL) and fiber optics with a flying slider for a practical near-field recording system. The configurations proposed here, are capable of near-field recording using magneto-optical (MO) detection and phase-change (PC) detection. 50 nm of the flying height of the optical slider was obtained at a linear velocity of 10 m/s. The effective numerical aperture (NA) of the SIL itself was 1.24 and the rms value of the wavefront aberration of the SIL was 0.0367λ. This rms value can realize an accurate readout at a practical level. Further, the carder to noise ratio (CNR) for the mark length of 0.2μm on a spin stand was about 41 dB. This result indicates that a SIL can be combined with a flying slider for near-field recording.

    Original languageEnglish
    Pages (from-to)260-267
    Number of pages8
    JournalProceedings of SPIE - The International Society for Optical Engineering
    Publication statusPublished - 2002 Jan 1
    EventOptical Data Storage 2001 - Santa Fe,NM, United States
    Duration: 2001 Apr 222001 Apr 25


    • Near-field recording
    • Optical flying head
    • Polarization maintaining fiber
    • Slider
    • Solid immersion lens (SIL)
    • Wavefront aberration

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering


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