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
Organic light emitting display device and method of manufacturing the same
Register files for a digital signal processor operating in an interleaved multi-threaded environment
Wideband antenna
Semiconductor chip, stack module, and memory card
Deposited conductive layers for leads of implantable electric stimulation systems and methods of making and using
Image output method and device, and image display
System and method for reliable packet data transport in a computer network
  Randomly Featured Patents
Method for fitting a holding block to a semifinished ophthalmic lens blank
8-substituted pyrazolopentathiepins and related compounds
Storage medium for preventing an irregular use by a third party
Air/fuel ratio control system
Constant-voltage clamping forward conversion switching power supply
Method and a device for eliminating fixed error disturbances in a pyroelectric vidicon
Fiber preforming process and coating for screen tooling therefor
Sink
Method and apparatus for electronic delivery of electronic model images
Methods and compositions for using non-ionic contrast agents to reduce the risk of clot formation in diagnostic procedures