Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Zoom lens and optical device using the same










Image Number 5 for United States Patent #6587280.

A zoom lens comprises a first lens unit having positive refractive power, a second lens unit having negative refractive power, an aperture stop, a third lens unit having positive refractive power and kept fixed during zooming, a fourth lens unit having positive refractive power, and a fifth lens unit having negative refractive power, which are arranged in this order from an object side. In zooming from a wide-angle end to a telephoto end, the second lens unit is moved toward an image plane side such that a spacing between the first lens unit and the second lens unit is increased, and the aperture stop is also moved.








 
 
  Recently Added Patents
Systems and methods for managing fleet services
Systems and methods for automated institutional processing of payments
Intralevel conductive light shield
(4926
Secure mobile ad hoc network
Creating and manufacturing documents that initially exceed equipment finishing capacity
Display control device, display control method, and touchpad input system
  Randomly Featured Patents
Silylated polycarbonate polymers, method of making, and articles
Mobile communication system, core network apparatus, and mobile communication terminal
Faucet
Self-sealing pneumatic tire and preparation thereof
Method and apparatus for reflective in-flight component registration
Mobile phone
Optoelectronic device packaging assemblies and methods of making the same
Portable computer and base member receiving arrangement
Extraction of acrylic acid and/or methacrylic acid with a solvent mixture of methylethylketone and xylene or ethylbenzene
Optical data bus and method