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
Control system for an internal combustion engine
LED lighting module
Canopy light fixture
Monitoring heap in real-time by a mobile agent to assess performance of virtual machine
Measurement system service for a vehicle instrument panel
Integrated circuit with electromagnetic intrachip communication and methods for use therewith
Error correct coding device, error correct coding method, and error correct coding program
  Randomly Featured Patents
Track assembly for a pull-out member
Planing machine
Skim removal
Methods for post-etch deposition of a dielectric film
Flow-through cable
Method of manufacturing laminated flexible bearings, in particular for engine nozzle joints
Method and apparatus for continuously forming color display layer on stainless steel strip
Cone crusher
Apparatus for anaesthetizing an animal
Connection of sectional bars, of a support system for a sanitary apparatus