Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Object lens for an infinite-type optical pickup, optical pickup and optical information processing device










Image Number 11 for United States Patent #7274646.

As an object lens for an optical pickup, applied is a single-lens and both-side-convex configuration is applied. Further, specific conditional formulas are created with respect to a particular numerical aperture NA, for a paraxial curvature radius R1 on the surface on the light source side; the working distance WD, the refractive index nd with respect to the d-line, and the focal length f. Furthermore, specific conditional formulas are created for the refractive index nd with respect to the d-line and the Abbe's number .nu.d.








 
 
  Recently Added Patents
Magnetic detection of small entities
Digital X-ray detector arrangement and digital X-ray imaging method
Crystalline form of zofenopril calcium
Preparation and its use of derivatization reagent for detecting L-carnitine or D-carnitine
Semiconductor assembly and semiconductor package including a solder channel
Chip on film (COF) package having test line for testing electrical function of chip and method for manufacturing same
Moulded tie strips
  Randomly Featured Patents
Line of sight pointing mechanism for sensors
Data storage and retrieval system with improved data base structure
Multi-purpose acid compositions
Fixed geometry controlled entrainment ventilated convergent nozzle and method
Article of footwear with a backward extension to the sole
Modified triple wrap encryption/decryption system
Charge multiplier with logarithmic dynamic range compression implemented in charge domain
Solid state electrical switch employing electrochromic material
Apparatus for shaping superplastic metal workpiece
Deodorant dispenser