Method And Device For Writing Multiple-Layer Optical Discs
First Claim
1. Method of writing information in a storage layer (2A, 2B) of a multi-layer optical storage medium (2) comprising two or more storage layers (2A, 2B), the method comprising:
- monitoring a focus condition of an optical write beam (32b);
inhibiting the writing process in case of an axial focus displacement event.
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Accused Products
Abstract
A method of writing information in a storage layer (2A,2B) of a multi-layer optical storage medium (2) comprising two or more storage layers (2A,2B), especially multi-layer recordable and rewritable optical discs, especially DVD discs or BD discs. The method comprises the steps of monitoring a focus condition of an optical write beam (32b), and inhibiting the writing process in case of an axial focus displacement event. Also described is a medium access device (10), capable of writing information in a storage layer (2A,2B) of a multi-layer optical storage medium (2). The medium access device (10) comprises: light beam generating means (31) for generating a write light beam (32); focussing means (34) for focussing the write (32) in a focal spot (F) at a target storage layer (2A); write inhibit means (64) for inhibiting a writing process in case of an axial focus displacement event.
7 Citations
13 Claims
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1. Method of writing information in a storage layer (2A, 2B) of a multi-layer optical storage medium (2) comprising two or more storage layers (2A, 2B), the method comprising:
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monitoring a focus condition of an optical write beam (32b);
inhibiting the writing process in case of an axial focus displacement event.
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2. Medium access device (10), capable of writing information in a storage layer (2A, 2B) of a multi-layer optical storage medium (2) comprising two or more storage layers (2A, 2B);
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the medium access device (10) comprising;
light beam generating means (31) for generating a write light beam (32);
focussing means (34) for focussing the write light beam (32) in a focal spot (F) at a target storage layer (2A);
write inhibit means (64) for inhibiting a writing process in case of an axial focus displacement event. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification