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
Semiconductor device having a bonding pad and shield structure of different thickness
Functionalized main chain polymers
Method and apparatus for providing seamless call handoff between networks that use dissimilar transmission methods
Use of beta-adrenoceptor antagonists for the manufacture of a medicament of the treatment of disorders of the outer retina
Self-correcting amplifier system
Display screen with graphical user interface
Multi charged particle beam writing apparatus and multi charged particle beam writing method
  Randomly Featured Patents
Stackable shelving system
Control object and user interface for controlling networked devices
Substrate transport apparatus with angled arms
Method and apparatus of measuring seek time using optical disk apparatus
Rake receiver and receiving method
Method and arrangement for operating a steering system for a motor vehicle
Golf pencil display
Method and system for controlling access for mobile agents in home network environments
Method and apparatus for on-line moisture analysis of a concentrate