Resources Contact Us Home
Zoom flash with liquid crystal lens

Image Number 9 for United States Patent #7616881.

A camera apparatus (10) has a zoom lens (12) having a zoom focus setting that is adjustable over a range of focus values and control circuitry for generating a variable voltage potential according to the zoom focus setting. A flash illumination apparatus (20) has a light source (32) and a variable focus liquid crystal lens (24), the variable focus liquid crystal lens (24) having a first and a second solid optical element (40, 50), chamber (44), the two electrodes (42, 48) and liquid crystal material (46). A variable voltage is applied to the liquid crystal material (46) for the lens power according to the zoom focus setting.

  Recently Added Patents
Methods of fabricating semiconductor device
Method and apparatus for communication channel error rate estimation
Compounds and compositions for treating chemical warfare agent-induced injuries
Methods of measuring cell viability in tissue engineered products
Lightning-protective explosion-preventive fastener
Compounds for the reduction of .beta.-amyloid production
Communication network management system, method and program, and management computer
  Randomly Featured Patents
Hydroxy-aryl metal chelates for diagnostic NMR imaging
Blends of acrylonitrile copolymers with graft copolymers containing rubber and acrylonitrile copolymer
Position detection device for mobile robot and robot cleaner including the same
Incremental delta-sigma data converters with improved stability over wide input voltage ranges
Remote terminal channel unit for telephone transmission lines
Alternative silicon chip geometries for integrated circuits
Modified polyolefin particles and process for preparation thereof
Developing device, image carrier unit and image forming apparatus
Route guidance learning device