Title:
LIGHT-TRANSMITTING CERAMIC, METHOD FOR PRODUCING THE SAME, OPTICAL COMPONENT AND OPTICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/122985
Kind Code:
A1
Abstract:
Disclosed is a light-transmitting ceramic mainly composed of a perovskite compound, which
has no birefringence and exhibits high refractive index and high transmittance. In
addition, the light-transmitting ceramic has high flexural strength and diffuses
only a little light. Specifically disclosed is a light-transmitting ceramic
which contains a perovskite compound represented by the following general formula:
Ba(ZrxMgyTaz)vOw (wherein
0.100 ≤ x ≤ 0.700, 1.83 - 0.333x ≤ z/y ≤ 2.17 + 0.333x,
x + y + z = 1, 1.000 ≤ v ≤ 1.047 + 0.0333x, and w represents a positive
number required for neutralizing the electrical charge) as a main crystal phase.
For example, this light-transmitting ceramic can be advantageously used as
an objective lens (2) of an optical pickup (9).
Inventors:
KURETAKE SATOSHI (JP)
Application Number:
PCT/JP2007/057437
Publication Date:
November 01, 2007
Filing Date:
April 03, 2007
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
KURETAKE SATOSHI (JP)
KURETAKE SATOSHI (JP)
International Classes:
C04B35/00; G02B1/00; G11B7/135
Domestic Patent References:
| WO2005097707A1 | 2005-10-20 | |||
| WO2006114953A1 | 2006-11-02 | |||
| WO2006038378A1 | 2006-04-13 | |||
| WO2005097708A1 | 2005-10-20 |
Foreign References:
| JP2006312579A | 2006-11-16 | |||
| JP2004075512A | 2004-03-11 |
Attorney, Agent or Firm:
KOSHIBA, Masaaki (Nisshin Buiding 14-22,Shitennoji 1-chome, Tennoji-ku,Osaka-sh, Osaka 51, JP)
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