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7657results about How to "High energy" patented technology

Biological applications of quantum dots

The present invention provides a composition comprising fluorescent semiconductor nanocrystals associated to a compound, wherein the nanocrystals have a characteristic spectral emission, wherein said spectral emission is tunable to a desired wavelength by controlling the size of the nanocrystal, and wherein said emission provides information about a biological state or event.
Owner:MASSACHUSETTS INST OF TECH

Utilization of Yb: and Nd: mode-locked oscillators in solid-state short pulse laser systems

An optimized Yb: doped fiber mode-locked oscillator and fiber amplifier system for seeding Nd: or Yb: doped regenerative amplifiers. The pulses are generated in the Yb: or Nd: doped fiber mode-locked oscillator, and may undergo spectral narrowing or broadening, wavelength converting, temporal pulse compression or stretching, pulse attenuation and / or lowering the repetition rate of the pulse train. The conditioned pulses are subsequently coupled into an Yb: or Nd: fiber amplifier. The amplified pulses are stretched before amplification in the regenerative amplifier that is based on an Nd: or Yb: doped solid-state laser material, and then recompressed for output.
Owner:IMRA AMERICA

Multi-wavelength imaging system

The present invention relates to a multi-energy system that generates and / or forms images of targets / structures by applying Mueller matrix imaging principles and / or Stokes polarimetric parameter imaging principles to data obtained by the multi-energy system. In one embodiment, the present invention utilizes at least one energy or light source to generate two or more Mueller matrix and / or Stokes polarization parameters images of a target / structure, and evaluates the Mueller matrix / Stokes polarization parameters multi-spectral difference(s) between the two or more images of the target / structure. As a result, high contrast, high specificity images can be obtained. Additional information can be obtained by and / or from the present invention through the application of image, Mueller matrix decomposition, and / or image reconstruction techniques that operate directly on the Mueller matrix and / or Stokes polarization parameters.
Owner:THE UNIVERSITY OF AKRON

Digital video fingerprinting

A digitally encoded video fingerprinting system for generating and comparing/matching finger-prints from digitally encoded video which has been encoded according to an encoding method which involves the generation of residual macroblocks of pixels and the generation of quantized transform coefficients of the residual macroblocks, or of portions of the residual macroblocks, comprises a fingerprint database (5) and a video processing subsystem (10). The video processing subsystem (10) includes a fingerprint sequence selection module (14, 24) which is operable to select one or more sets of frames from input video content to be processed in order to generate a fingerprint; a fingerprint calculation module (14, 26) which is operable to generate a fingerprint based on a set of frames selected by the fingerprint sequence selection module; and a fingerprint comparator module (14, 28) which is operable to compare two fingerprints and to output a similarity score of the compared fingerprints. The method used by the fingerprint selection and fingerprint calculation modules includes selecting a group of frames of the encoded video content; processing the digitally encoded video content to obtain a set of quantized transform coefficients of residual macroblocks or portions of residual macroblocks associated with each of the selected frames; identifying a set of residual macroblocks per frame whose transform coefficients satisfy a threshold criterion; and generating a digital video fingerprint for the encoded video content in dependence upon the identified macroblocks or some property thereof within each of the selected frames.
Owner:BRITISH TELECOMM PLC
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