Optical disk recorder for diverse media types and having a...

Details Optical disk recorder for diverse media types and having a... Optical disk recorder for diverse media types and having a...

G - Physics

11

B

G11B 7/00 (2006.01) G11B 7/09 (2006.01) G11B 7/125 (2006.01) G11B 27/19 (2006.01)

Patent

CA 2046704

An optical disk recorder is capable of operating with diverse types of optical media. An device initialization procedure is repeated for each receipt of each optical medium. Such procedure includes moving a objective lens to an extreme radial position, defocussing the lens at a most remote position, then calibrating the laser circuits to ensure that the emission of radiation from the laser will not inadvertently destroy signals recorded on the just received medium. Then the medium type is read from the medium and based upon the type indication, various additional calibrating procedures are followed and different sources of laser control values are used for signal exchanging operations between the recorder and received optical medium.

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