Proceedings of JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment : IIP/ISPS joint MIPE
Online ISSN : 2424-3132
2003
会議情報
P-ORS-01 Readout Characteristics of Flexible Monolithic Optical Head Slider obtained using Avalanche-Photo-Diode (APD)-Based Detector
Terunao HIROTAGakushi TANAKAToshifumi OHKUBOKiyoshi ITAO
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会議録・要旨集 フリー

p. 397-398

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抄録
In this paper, we report on a first-surface recording demonstration using a flexible monolithic optical head slider[1][2] and lens-less detection optics. To miniaturize the detection optics, we directly located an avalanche photo diode (APD) sensor in close proximity to the medium, and by minimizing the detector-to-medium spacing, a lens-less detection system was constructed. The light collection efficiency was equivalent to that of 0.36 NA objective lens, and can be improved to be equivalent to 0.6 NA. Using this detection method, we successfully demonstrated a lens-less signal readout of 0.8 μm line-and-space pattern at 4.2 m/s linear velocity (2.6MHz). The effect of misalignment of the head and the detector is also discussed.
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© 2003 The Japan Society of Mechanical Engineers
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