Apparatus and method for recording an information on a...

Details Apparatus and method for recording an information on a... Apparatus and method for recording an information on a...

2008-07-08

2008-07-08

Feild, Joseph (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S112020

Reexamination Certificate

active

10537065

ABSTRACT:
A method and a corresponding apparatus for recording an information on a recordable optical record carrier (2) by irradiation of a light beam through an optical system (3-7) onto said record carrier (2) for forming marks and lands representing said information along an information recording direction (t), obtains a higher recording density, and thus higher data capacity, by using astigmatism for influencing the light beam from the light source (8) to the record carrier (2) during recording of information so as 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 thereto, i.e., the radial direction.

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