07342850 is referenced by 4 patents and cites 8 patents.

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, 4) in the direction orthogonal to the information recording direction, 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, i.e. the tangential direction for an optical disc, compared to the direction orthogonal that to, i.e. the radial direction. Recording marks having a corresponding oval profile arec achieved.

Title
Apparatus and method for recording an information on a recordable optical record carrier using oval spot profile
Application Number
10/536640
Publication Number
7342850 (B2)
Application Date
December 1, 2003
Publication Date
March 11, 2008
Inventor
Erwin Rinaldo Meinders
Eindhoven
NL
Hubert Cecile Francois Martens
Eindhoven
NL
Agent
Michael E Belk
Assignee
Koninklijke Philips Electronics
NL
IPC
G11B 7/00
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