P-ORS-01 Readout Characteristics of Flexible Monolithic Optical Head Slider obtained using Avalanche-Photo-Diode (APD)-Based Detector
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概要
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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.
著者
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Itao Kiyoshi
Graduate School Of Frontier Sciences The University Of Tokyo
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Itao Kiyoshi
University Of Tokyo
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Itao Kiyoshi
Graduate School Of Frontier Science The University Of Tokyo
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Ohkubo Toshifumi
Department Of Mechanical Engineering Faculty Of Engineering And Science Toyo University
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Ohkubo Toshifumi
Department Of Mechanical Engineering Toyo University
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HIROTA Terunao
Graduate School of Frontier Sciences, The University of Tokyo
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TANAKA Gakushi
Graduate School of Frontier Sciences, The University of Tokyo
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Hirota Terunao
Graduate School Of Frontier Sciences The University Of Tokyo
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Ohkubo Toshifumi
Graduate School Of Frontier Sciences The University Of Tokyo
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Tanaka Gakushi
Graduate School Of Frontier Sciences The University Of Tokyo
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OHKUBO Toshifumi
Department of Engineering,Toyo University
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