Resources Contact Us Home
Optical scheme for holographic imaging of complex diffractive elements in materials

Image Number 3 for United States Patent #6297894.

This invention discloses optical system and method for writing a refractive index pattern in a light transmissive or light absorbing sample. A light source for providing a short pulse laser beam in the femtosecond range having a low power per unit area is coupled to provide the short pulse beam to a diffractive optical element. A curved mirror collects light transmitted through or reflected from the diffractive optical element preserves an image relating to characteristics of the diffractive optical element encoded within the collected light, and directs the collected light in wavelength independent manner while preserving the image of the diffractive optical element encoded within the collected light. A rod lens demagnifies the image within the light received from the curved mirror so as to increase its power per unit area when directed to the light transmissive or absorbing sample to be permanently impressed therein.

  Recently Added Patents
Image decolorizing device
Automatic population of feature capabilities on a communication device
Powerline communication receiver
Method for encoding signal, and method for decoding signal
Transistor and display device
Information display
Social community generated answer system with collaboration constraints
  Randomly Featured Patents
Coaxial cable cutter
Paint roller cleaner
Convertible hearing aid/tinnitus masker
Filter apparatus
Occupant propelled vehicle
Front bumper for a vehicle
Pipe coupling
Wrap film supplier
Circuit protection device and system
Device for sensing liquid hydrocarbon