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
Fiber optic cables and assemblies for fiber toward the subscriber applications
Digital broadcasting transmission and reception system, and a signal processing method using turbo processing and turbo decoding
Press nut
Keypoint descriptor generation by complex wavelet analysis
Cake knife handle
Systems, methods, and apparatus to prepare a mobile device for provisioning
Radio communication system, transmission apparatus, reception apparatus, and radio communication method in radio communication
  Randomly Featured Patents
One-sided corrugated cardboard machine
Method for programming/parallel programming of onboard flash memory by multiple access bus
Combined microphone and shielder
Handheld electronic device and operating method thereof
Sliding-vane rotary compressor for bearing lubrication
Textile food casing impregnated with food additive
Stimulation electrode selection
Food wedger
Electrical interconnects having a supported bulge configuration
Application code conversion architecture