Resources Contact Us Home
Zoom lens system, imaging device and camera

Image Number 10 for United States Patent #7319563.

An object is to provide a high-resolution zoom lens system which has fewer lens elements and therefore, can be retracted into a compact form when not in use; and the zoom lens system, in order from the object side, comprises a first lens unit G1 having negative power, a second lens unit G2 having positive power and a third lens unit G3 having positive power, wherein magnification is varied with change in intervals between each lens unit by independently moving each lens unit along an optical axis, in which the first lens unit G1 comprises one negative lens element L1 and one positive lens element L2, the second lens unit G2 comprises only a cemented lens element having set of three lens elements L3, L4 and L5 which are cemented with each other, and the third lens unit G3 comprises one positive lens element L6.

  Recently Added Patents
Copolymer for positive type lithography, polymerization initiator used in production of said copolymer, and composition for semiconductor lithography
Error scanning in flash memory
Method and system for weighted fair queuing
Detection of bioagents using a shear horizontal surface acoustic wave biosensor
Field device for determining or monitoring a physical or chemical process variable
Computer implemented apparatus for generating and filtering creative proposal
Playback device, playback method, and computer program
  Randomly Featured Patents
Variable wire rope brake assembly
Sliding anchor
Tuft picking device for a brush making machine
Tripod constant velocity joint
Computer enclosure incorporating hood fastening structure
Oxygen-fuel burner assembly and operation
Belt-pulley type steplessly variable transmission assembly
Signcryption scheme based on elliptic curve cryptography
Process for producing briquetted and pressed granular material and use thereof
Enhancing access to data storage