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
File management apparatus and file management apparatus controlling method
Integrated circuit with electromagnetic intrachip communication and methods for use therewith
Magnetic disk and manufacturing method thereof
Detection of procedural deficiency across multiple business applications
Petunia plant named `Bartpet001`
Vehicle control system
Pet fish burial pod
  Randomly Featured Patents
Preparation of triblock copolymers
Fabrication process of semiconductor package and semiconductor package
Overrunning clutch having a cage design for directing lube flow
Timing generator circuit including adjustable tapped delay line within phase lock loop to control timing of signals in the tapped delay line
Stress-induced phosphoprotein 1 as a biomarker for the detection of human ovarian cancers and endometriosis
Torque mechanism actuated bioabsorbable vascular closure device
Chemical amplified photoresist composition
High bandwidth communication system and method
Compensated operational amplifier and active RC filter including such an amplifier
Bar stool