Title:
OPTICAL PICKUP DEVICE, OPTICAL ELEMENT, OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE AND DESIGN, METHOD OF OPTICAL ELEMENT
Document Type and Number:
WIPO Patent Application WO/2007/123112
Kind Code:
A1
Abstract:
In order to provide an optical pickup device, an objective optical element and
an optical information recording and reproducing device that can properly record
and/or reproduce information with three different recoding densities and that
can be realized with a simplified structure and at low cost, the optical pickup
device is comprised of an optical element, the construction of which is stacked
with first, second and third basic structures to make different optical lengths.
Inventors:
NAKAMURA, Kentarou (Inc. 2970 Ishikawa-machi, Hachioji-sh, Tokyo 05, 1928505, JP)
中村 健太郎 (〒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)
OTA, Kohei (Inc. 2970 Ishikawa-machi, Hachioji-sh, Tokyo 05, 1928505, JP)
中村 健太郎 (〒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)
OTA, Kohei (Inc. 2970 Ishikawa-machi, Hachioji-sh, Tokyo 05, 1928505, JP)
Application Number:
JP2007/058325
Publication Date:
November 01, 2007
Filing Date:
April 17, 2007
Export Citation:
Assignee:
Konica Minolta Opto, Inc. (2970, Ishikawa-machiHachioji-shi, Tokyo05, Tokyo1928505, 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, Tokyo1928505, JP)
NAKAMURA, Kentarou (Inc. 2970 Ishikawa-machi, Hachioji-sh, Tokyo 05, 1928505, JP)
中村 健太郎 (〒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)
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, Tokyo1928505, JP)
NAKAMURA, Kentarou (Inc. 2970 Ishikawa-machi, Hachioji-sh, Tokyo 05, 1928505, JP)
中村 健太郎 (〒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)
International Classes:
G02B5/18; G02B13/00; G11B7/135; G02B13/18