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
Method and apparatus for content-aware resizing of data chunks for replication
Message value indicator
Method of making a low-Rdson vertical power MOSFET device
System and apparatus for control of published content
Dihydronaphthyridinyl(organo)methanone analogs as positive allosteric mGluR5 modulators
Combination photovoltaic and wind power generation installation
  Randomly Featured Patents
Serial scan chain control within an integrated circuit
Pressure reducing valve
Transit time thermodilution guidewire system for measuring coronary flow velocity
Tire tread
Multi-layer puzzles
Battery operated thermal printer with means to optimize battery life
Ring binder mechanism
Pet toy
Method, device and system for responsive load management using frequency regulation credits