Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Di and tri- substituted oxathiazine derivatives, method for the production, method for the production thereof, use thereof as medicine and drug containing said derivatives and use thereof
Self cleaning rake
Scalable encoding apparatus, scalable decoding apparatus, scalable encoding method, scalable decoding method, communication terminal apparatus, and base station apparatus
Stool
Interconnect, bus system with interconnect and bus system operating method
Polymeric compositions including their uses and methods of production
Multiple CQI feedback for cellular networks
  Randomly Featured Patents
Process for reducing the quantity of hydrolyzable chlorides in isocyanates
Redox buffered hydrofluoric acid etchant for the reduction of galvanic attack during release etching of MEMS devices having noble material films
Connector for fibre optic cable
Weather strip for use on a sunroof
Camera with flip-up flash
Hand-held aid for human locomotion
Polybenzimidazole thin film composite membranes
Cabinet
Powder carrier screw, development device and image forming device using the powder carrier screw
Duct joiner and method of manufacture