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
LED-array package
Plants and seeds of hybrid corn variety CH514730
Modular utility rack
Electric motor
Method of sheet alignment and method of post-processing comprising the same and method of image formation
Apparatus and method for transmitting and receiving data
System and method for combining different tablets into a pouch
  Randomly Featured Patents
Reinforcement teeth structure for ratchet
Children's novelty toothbrush
Inversion polymerization process for producing vinyl resins using a dual layer coating
Multiple-VCO tuning
Use of the protease domain of human plasminogen activator for the treatment of thromboembolic diseases
Multipurpose medical electrode
Print media ejection system
Substituted 2-amidotetralins as melatonin agonists and antagonists
Image preprocessing for probe mark inspection
Chirped-pulse multiple wavelength telecommunications system