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
Nucleic acids for cloning and expressing multiprotein complexes
Domestic soda-water preparing device
Spalling utilizing stressor layer portions
Voltage regulator structure that is operationally stable for both low and high capacitive loads
Information repository search system
High conductive water-based silver ink
Solid-state image sensing device and control method of solid-state image sensing device
  Randomly Featured Patents
Versatile RAM for programmable logic device
Patient directed system and method for managing medical information
Methods of preparing hydroxy functional vegetable oils
Process for removing carbon dioxide containing acidic gases from gaseous mixtures using a basic salt activated with a hindered amine
Electrical connector mounting device for trailer chassis
Gravel pack assembly
Method and apparatus for sensitivity-encoded magnetic resonance imaging using an acquisition coil array
Print hammer limit control
Recessed bonding of target for RF diode sputtering
Method for encapsulating solder metal powders and solder metal powders produced according to this method