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
Optical angular position detection apparatus and method
Plasmon generator includes three metal layers for thermally-assisted magnetic recording
Methods of isolating bipotent hepatic progenitor cells
Secure Flash-based memory system with fast wipe feature
Selective high frequency spinal cord modulation for inhibiting pain with reduced side effects, and associated systems and methods
Method and apparatus for sensing an input object relative to a sensing region of an ultrasound sensor device
Incentive based recommendation method for mobile station content
  Randomly Featured Patents
Color reversal photographic light-sensitive material
Controller for wire-cut electrical discharge machine
Vacuum bag mounting collar
Test wafer unit and test system
Process for the preparation of polymers of vinylene carbonate
Endpoint-hosted hypervisor management
Safety strap assembly for tree climbers
Sodding element and method of producing sodding
Method and apparatus for simulating a load on an application server in a network
Method to treat sickle cell disease