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
Adaptive analog echo/next cancellation
System and method for enhancing buyer and seller interaction during a group-buying sale
Low offset, fast response voltage controlled current source and controlling method thereof
Image sensing apparatus and method of controlling the image sensing apparatus
Active metal fuel cells
Multiple RF band operation in mobile devices
  Randomly Featured Patents
Method of administering camptothecin compounds for the treatment of cancer with reduced side effects
S-5-substituent-N-2'-(thiophene-2-yl)ethyl-tetralin-2-amine or chiral acid salts thereof and use for preparing Rotigotine
Vector control system for AC motor drives
Quadrature receiver with correction engine, coefficient controller and adaptation engine
Polypeptide compositions and methods
Photosensitizers with ligand targeting properties for tumor therapy
Waste container
Method and system for adaptive identity analysis, behavioral comparison, compliance, and application protection using usage information
Hand held computer
Method of treating muscular tension, muscle spasticity and anxiety with 3-aryloxy and 3-arylthioazetidinecarboxamides