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
Photoelectric conversion device
Encoder that detects positional information of a moving body generating interference fringes that move in opposite directions
Field emission cathode structure
Portable computer
Flat panel display device and method of fabricating the same
Systems and methods for universal enhanced log-in, identity document verification and dedicated survey participation
Photovoltaic system with integrated photovoltaic panel and battery
  Randomly Featured Patents
Fibrous solid carbon manifold assembly and method for producing the same
Connecting profile for connecting sheet piles to carrier elements and combined sheet pile wall comprising such a connecting profile
Compounds and methods for lowering the abuse potential and extending the duration of action of a drug
Display system, method, and computer program product for capturing images using multiple integrated image sensors
Pipe joint
Therapeutic use of JAK-3 inhibitors
Apparatus for the production of hinge-lid packs for cigarettes
Low-thrust cryogenic propulsion module
Integration of data processing systems
Cellular seat cushion