Resources Contact Us Home
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
Magnetoresistive shield with coupled lateral magnet bias
Lighting device with device for regulating the illumination according to the luminance of the illumination field and corresponding use
Coding circuitry for difference-based data transformation
Active metal fuel cells
Plants and seeds of hybrid corn variety CH817100
Output queued switch with a parallel shared memory, and method of operating same
Data security for dynamic random access memory using body bias to clear data at power-up
  Randomly Featured Patents
Condensed phase exciplex lasers
Data acquisition system for medical imaging
Digital audio tone evaluating system
Portable phone
Stair climbing and descending attachment for a hand truck
Method and system for discriminating between different types of batteries and charging the same
Portion of shoe upper
Protection device for a stethoscope
Window pour mold
Multi-fluid blending spray tip for coaxial syringe