The focusing optimization routine which is due to a little optimum in the optical disk system jump and is improved

摘要

Method and the system which obtain the focusing optimization in the optical disk system are disclosed. The focusing offset of the aforementioned record unit is set to 1st ones among plural specified values. Value of high frequency quality is measured in regard to the value of aforementioned focusing offset where the aforementioned record unit is selected, is remembered. Next, aforementioned focusing offset is set to known best focusing offset value. The track/truck on the optical disk which next, has read out jumps. Next, the above-mentioned step, is repeated in regard to each of focusing offset value of the aforementioned plural specified values. It is decided from measurable quantity of the aforementioned high frequency quality where next, aforementioned optimum focusing setting is remembered.