发明名称 Apparatus and method for recording an information on a recordable optical record carrier using oval spot profile
摘要 The present invention relates to a method and a corresponding apparatus for recording an information on a recordable optical record carrier ( 2 ) by irradiation of a light beam through optical means ( 3 - 7 ) onto said record carrier ( 2 ) for forming marks and lands representing said information along an information recording direction (t). To obtain a higher recording density, and thus higher data capacity, it is proposed according to the present invention to reduce the numerical aperture of the optical means ( 3 - 7 ) in the direction (r) orthogonal to the information recording direction (t), which is the radial direction for an optical disc, during recording of information to obtain a light beam having a substantially oval spot profile having a shorter axis in the information recording direction (t), i.e. the tangential direction for an optical disc, compared to the direction (r) orthogonal that to, i.e. the radial direction.
申请公布号 US2008198726(A1) 申请公布日期 2008.08.21
申请号 US20080029252 申请日期 2008.02.11
申请人 KONINKLIJKE PHILIPS ELECTRONICS, N.V. 发明人 MARTENS HUBERT CECILE FRANCOIS;MEINDERS ERWIN RINALDO
分类号 G11B7/00;G11B7/013;G11B7/135 主分类号 G11B7/00
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