Patent ID: 6122232
Filing Date: 2000-09-19
Classification: G11B,H02K

Abstract:
An optical drive system, comprising:an optical assembly including a light source for transmitting light through said optical assembly, and a photodetector disposed in a path of returning light returned from a respective information storage medium, said photodetectorfor measuring return light received from the respective medium;an objective lens subassembly for directing light from said light source between said optical assembly and said respective information storage medium;an objective lens disposed in said objective lens subassembly, said objective lens defining an optical axis;an actuator assembly suspending said objective lens subassembly for relative motion thereof with respect to said actuator assembly;a carriage assembly having said actuator assembly mounted thereon, said objective lens subassembly thereby being movable relative to said carriage assembly, said carriage assembly further having a center of mass lying on said optical axis;a base plate having said optical assembly secured thereto, said carriage assembly being slidably engaged with said base plate so that said transmitting and returning light may be processed through said objective lens subassembly while said carriage assembly moves said objective lens subassembly relative to said base plate;a first servomotor for moving said actuator assembly in said tracking direction relative to the respective medium;first electronic means for controlling said first servomotor;a motor for moving the respective medium relative to said objective lens subassembly, said motor being secured to said base plate and having a support assembly for supporting the respective medium;second electronic means responsive to an output signal of said photodetector for decoding information carried in said light returning from the respective medium;third electronic means for enabling said light source to emit light at a first intensity to encode information on the respective medium and at a second intensity to read information encoded thereon;data receiving means for accepting data that is storable on the respective medium;data encoding means being responsive to said data receiving means for representing said data to be stored in a predetermined format, said data encoding means also for directing data to said third electronic means;a magnetic field generator for producing a magnetic field on a portion of the respective medium and for coacting with said third electronic means and said light source to write and erase information on the respective medium;a cartridge loading assembly for removably positioning the respective medium on said support assembly of said motor; anda mechanical isolator interposed between said first servomotor and said base plate to reduce vibration transfer from said base plate to said actuator so that said transmitting and returning light may be accurately maintained relative said objective lens and said photodetector to thereby operate said servo error detecting means with greater precision said mechanical isolator further including means for mitigating the effects of undesired mechanical forces upon a movable disc drive component.