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
Method of and apparatus for evaluating an optimal irradiation amount of an electron beam for drawing a pattern onto a sample
Synthesized interoperable communications
Polymeric structures comprising a siloxane
Milk frother
Fuel cell and a method of manufacturing a fuel cell
Portion of display panel or screen with an icon
Illumination apparatus for microlithography projection system including polarization-modulating optical element
  Randomly Featured Patents
Buffer with controlled hysteresis
Coating device and coating method for highspeed coating with an organic solvent
Image forming method and image forming apparatus
Antenna device
Electric caulking gun
Lubricating oil composition for diesel engine and method for lubrication of diesel engine using same
Posterior lumbar lordosis orthotic device
Market center based purchasing system and method
Physically secure computing system and device, and physically secure container therefor
Method of filtering an image with bar-shaped structures