Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Wide-angle, high-zoom-ratio zoom lens










Image Number 7 for United States Patent #7177092.

The invention relates to a four- or five-group zoom lens that ensures wide-angle performance, high zoom ratios and high quality with a more reduced number of lenses than ever before. The zoom lens comprises, in order from its object side, a first lens group G1 having positive power, a second lens group G2 having negative power, a third lens group G3 having positive power, a fourth lens group G4 having negative power and a fifth lens group G5 having positive power. The fourth lens group G4 comprises one lens. For zooming, all the spacings between the respective lens groups vary and the first lens group G1 moves in such a way as to arrive at the object side at the telephoto end position rather than at the wide-angle end position.








 
 
  Recently Added Patents
Method, apparatus, and system for synchronizing contents
Contact detection between a disk and magnetic head
Method and system for detecting data modification within computing device
Subpixel-based image down-sampling
Timing controller capable of removing surge signal and display apparatus including the same
Circuit board and display panel assembly having the same
Method of controlling an indentation depth of an electrode into a metal substrate during welding
  Randomly Featured Patents
Fungicidal novel N-benzyl-N-(2-norbornyl)-ureas
Drive system for centrifugal processing apparatus
Method of providing narrative information to a traveler
Clathrate compound
Error correlation for wireless networks
Receipt transport and retrieval system for automated banking machine
Mushroom hook cap for borescope
Fusible electroconductive mixtures
Molding laminate
Coupling assembly component