USA As Represented by Secretary of the Navy

Board of Governors for Higher Education, State of Rhode Island and Providence Plantations

Charles K Manka

Jacob Grun

Sergei Nikitin

Jeffrey H Bowles

Jay F Sperry

Michael R Corson

David William Donnelly

Billy Charles Covington

An additive {hacek over (S)}olc filter (ASF) includes i) a first polarizer for receiving an input light, such as from a monochromatic light source, and transmitting a first polarized output, ii) at least one birefringent plate positioned to receive the first polarizer output and transmit an output with wavelength-dependent polarization state, and iii) a second polarizer for receiving the plate output and transmitting a second polarized, filtered output. An ASF spectroscopy system includes the ASF; a monochromatic light source input, e.g. a laser; a sample chamber for exposing a sample to the second polarized, tuned output and generating a signal characteristic of the sample that is filtered by the ASF; and a detector for acquiring the characteristic signal.

Optical additive solc filter for deep ultraviolet applications

A spectroscopic detector includes a tunable light source, such as a continuously tunable, optical parametric oscillator laser; means for measuring the emitted radiation at a plurality of emission wavelengths to obtain a plurality of spectral measurement data; and a processor for processing the spectral measurement data, where the processor includes a multispectral data processing algorithm or is configured for 1) combining the plurality of spectral measurement data into a composite spectrum, and 2) applying the algorithm to the composite spectrum. The spectra such as resonant and near-resonant Raman Spectra that are acquired are more complete and contain more information. A powerful multispectral analysis code such as IHPS, CHOMPS, or ENN analyzes the acquired data points, examining details of the spectra that could not be handled by traditional methods.

Spectroscopic method and apparatus for identification of a substance using a tunable light source

A spectroscopic detector for identifying the presence of a first substance in the presence of another substance includes a laser for illuminating the substances at a plurality of wavelengths to induce the emission of radiation characteristic of the substance; a spectrometer for measuring the emitted radiation to obtain a plurality of spectral measurement data; and a processor for processing the data. An algorithm combines the data into a composite spectrum and a parameter characteristic of the first substance is identified while information in the composite spectrum contributed by emission of radiation from the other substance is removed to identify the presence of the first substance and obtain a characteristic spectral signature of the first substance. The signature is compared to signatures in a spectral library database, wherein at least some of the library signatures have spectral characteristics differentiated from each other by identifiable spectral characteristics caused by environmental factors.

Method and apparatus for identifying a substance using a spectral library database

Bulk crystalline materials are annealed by introducing into them mechanical energy of sufficient intensity to create a large amplitude sound wave. The mechanical energy may be introduced into the material, for example, by laser ablation. Where the bulk crystalline material is a doped semiconductor, the process also electrically activates the material.

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Alexandria, VA, United States of America

Charles K Manka