Optical disc system and method for controlling bias coil and light source to process information on a storage medium

摘要: An optical disc system for storing information on a medium includes light source, focusing mechanism, and tracking mechanism wherein the mechanisms are controlled by feedback loop focuses emitted source onto to effect writing of thereon. The is provided with an electronic circuit generating servo error signal that communicated in effecting corrections mechanism. further driver energizing bias coil disposed proximate medium, switchably connected supplying electric current thereto, monitoring having output responsive current, controller driver. thereby enables when exceeds predetermined magnitude so processed through written flowing threshold.