Resources Contact Us Home
Dynamic diffractive optical transform

Image Number 11 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
Sonic fast-sync system and method for bluetooth
Operation controlling apparatus
High surface area composition for use in the catalytic hydroconversion of a heavy hydrocarbon feedstock, a method making such composition and its use
Lacrosse head
Low-staining room temperature curable coating composition
Method and apparatus for communications
Multi-port, gigabit SERDES transceiver capable of automatic fail switchover
  Randomly Featured Patents
Blackout and night light
Dome structure
Image forming apparatus, image forming method and image forming system for receiving and executing plurality of print jobs
Placemats having integrated adhesive stickers or labels
Speech quality measurement based on radio link parameters and objective measurement of received speech signals
Gear shift control device of automatic transmission for variable stage upshift against wheel slip
Interconnect bus
Method and system for the detection of microcalcifications in digital mammograms
Method for repair and reconstruction of ruptured ligaments or tendons and for treatment of ligament and tendon injuries
Method for removing leukocytes and a filter system for removing the same