Resources Contact Us Home
Dynamic diffractive optical transform

Image Number 12 for United States Patent #7009581.

A dynamic diffractive optical transform. An electric field pattern is created across a body of material, the material being characterized in that it has an optical transmission property which varies in response to of an electric potential applied across a portion thereof. The electric field pattern is created such that the resulting profile of the transmission property is an arbitrary shape which produces a desired diffraction pattern that may not be physically realizable in conventional refractive optics or is a Fresnel lens-like construct derived from a refractive optical element. This is done by selectively applying electric potentials to transparent electrode pairs having liquid crystal material therebetween and preferably relatively small proportions in relation to the relevant wavelength of light, so as to create variations in phase delay that are aperiodic, have other than fifty percent spatial duty factor or have multiple levels of phase delay. The transform is embodied in an optical scanner, an adaptive lens, and an optical switch.

  Recently Added Patents
Recording head with high-frequency oscillator and bi-layer main pole height/width arrangement
Spill proof dog dish
Method of receiving a disaster warning message through a broadcast/multicast channel
Electronic module assembly for filtered feedthroughs
Optical line terminal
Home appliance
Methods and systems for dynamic division of path capacity
  Randomly Featured Patents
Homing and controlling IP telephones
Method and apparatus for the gamma correction of video signals
Pre-loading content to caches for information appliances
Rake mate and methods of constructing and utilizing same
Fixing peg for use in friable materials
Device and system for assisting printer selection through a network
Communication terminal with display of call information of calling party
Asparagus plant
Tube and shell evaporator operable at near freezing
Media player