Resources Contact Us Home
Optical disk driving apparatus, optical disk driving system, vehicle equipped with optical disk driving system, method of correcting spherical aberration in optical disk driving apparatus, pro

Image Number 3 for United States Patent #8130603.

An optical disk driving apparatus includes an optical head device having a laser light source, a converging optical system converging a light beam emitted by the laser light source onto an optical disk, a photo detector receiving reflected light reflected by the optical disk, and an aberration correcting optical system controlling aberration of the converging optical system; a motor rotating the optical disk; and a control section receiving a signal from the photo detector, wherein the converging optical system has an objective lens formed using resin as a main material, the aberration correcting optical system has a spherical aberration correcting element correcting spherical aberration, and the control section evaluates quality of a reproduction signal for information in the optical disk by using the reflected light received by the photo detector, and utilizes a result of the evaluation to perform closed loop control on the spherical aberration correcting element.

  Recently Added Patents
Lighting control device and lighting control method
Representations of compressed video
Cake knife handle
Cathode material for lithium ion secondary battery and lithium ion secondary battery using it
Apparatus and method for recording reboot reason of equipment
Local access to data while roaming with a mobile telephony device
Magnetic levitation motor used in lens module
  Randomly Featured Patents
Valve control assembly
Remote timekeeping device and system for controlling sports clock
Heat dissipation fan structure
Method of producing a turbine casing
Video encoding/decoding method and apparatus for motion compensation prediction
System and method for locating mobile terminals in mobile communication networks
Optical disk apparatus with an erase checking function
Compact laser aiming assembly for a firearm
Visual axis controllable optical apparatus including a visual axis detecting device for detecting a visual axis
Equalizer circuit for signal waveform reproduced by apparatus for magnetic digital data recording and playback