Title:
プラスティック製の高NAを有する対物システムを部分的に含むスキャニングシステム
Document Type and Number:
Japanese Patent JP4262986
Kind Code:
B2
Abstract:
An optical scanning device for scanning an information layer ( 104 ) of an optical record carrier ( 102 ) includes a radiation source ( 110 ) for generating a radiation beam ( 108 ) and a high-NA objective system ( 118 ) for converging the radiation beam on the information layer. The objective system includes a first lens ( 116 ) and a second lens ( 117 ). The first lens includes a glass body and the second lens is made of plastic. The signs of the temperature-dependences of the spherical aberration of the first and second lens are different, thereby reducing the temperature-dependence of the spherical aberration of the objective system as a whole.
Inventors:
Hendricks, Bernardus Harway
Application Number:
JP2002584308A
Publication Date:
May 13, 2009
Filing Date:
April 25, 2002
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
G02B13/00; G02B9/04; G02B13/18; G02B13/24; G11B7/135; G11B7/1378; G11B7/22
Domestic Patent References:
| JP10104507A | ||||
| JP2073210A | ||||
| JP61052328U | ||||
| JP8036124A | ||||
| JP10055562A | ||||
| JP9185836A | ||||
| JP59211013A | ||||
| JP10246801A | ||||
| JP9212908A | ||||
| JP2001174697A | ||||
| JP2001324673A | ||||
| JP9138344A |
Foreign References:
| WO2000037982A1 |
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Sadao Sasaki
Shinsuke Onuki
Tadashige Ito
Sadao Sasaki
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