Method of optically scanning an information plane and...

Details Method of optically scanning an information plane and... Method of optically scanning an information plane and...

G - Physics

11

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352/32.1

G11B 7/00 (2006.01) G11B 7/004 (2006.01) G11B 7/12 (2006.01) G11B 7/24 (2006.01) G11B 7/26 (2006.01) G11B 11/105 (2006.01)

Patent

CA 1322791

ABSTRACT: Method of optically scanning an information plane and optical record carriers and scanning apparatuses suitable for use of said method. When scanning an optical record carrier with a diffraction-limited scanning spot (S), the size of the effective scanning spot (S') can be considerably reduced by utilising the energy distribution within the scanning spot (S) in combination with a non- linear optical layer (22) in the record carrier (1) so that the resolution is increased both during reading and during writing. Fig. 6.

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