OPTICAL ELEMENT, PRODUCTION METHOD FOR OPTICAL ELEMENT, LIGHT-ASSISTED MAGNETIC RECORDING HEAD, AND MAGNETIC RECORDING DEVICE

WIPO Patent Application WO/2012/014631

A1

An optical element constitutes part of a hollow body, includes a hollow section with curved surface of the hollow body, said hollow section with curved surface being a reflective surface. A production method comprises: a step in which a rod-shaped element having a fan-shaped cross-section is extracted from the hollow body; a step in which a composition portion of a central section of a cross-section of a rod-shaped transparent body, in which the composition of a periphery section differs to the central section, is removed; or, a step in which the central section of the cross-section of the rod-shaped transparent body is removed to form a curved surface.

SHINDO, Hiroyuki (INC. 2970, Ishikawa-machi, Hachioji-sh, Tokyo 05, 〒1928505, JP)
新藤　博之 (〒05 東京都八王子市石川町２９７０番地　コニカミノルタオプト株式会社内 Tokyo, 〒1928505, JP)
HATANO, Hiroshi (INC. 2970, Ishikawa-machi, Hachioji-sh, Tokyo 05, 〒1928505, JP)

JP2011/065255

February 02, 2012

July 04, 2011

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KONICA MINOLTA OPTO, INC. (2970, Ishikawa-machi Hachioji-sh, Tokyo 05, 〒1928505, JP)
コニカミノルタオプト株式会社 (〒05 東京都八王子市石川町２９７０番地 Tokyo, 〒1928505, JP)
SHINDO, Hiroyuki (INC. 2970, Ishikawa-machi, Hachioji-sh, Tokyo 05, 〒1928505, JP)
新藤　博之 (〒05 東京都八王子市石川町２９７０番地　コニカミノルタオプト株式会社内 Tokyo, 〒1928505, JP)

G11B5/31; G11B5/02; G11B7/135; G11B7/22

KOYO INTERNATIONAL PATENT FIRM (Nikko Kagurazaka Bldg, 18 Iwatocho, Shinjuku-k, Tokyo 32, 〒1620832, JP)

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