Abstract: A two-layer hybrid solid wedged etalon was fabricated and combined with a traditional imager to make a compact computational spectrometer. The hybrid wedge was made of Nb2O5 and Infrasil 302 and was designed to operate from 0.4-2.4 ?m. Initial demonstrations used a CMOS imager and operated from 0.4-0.9 ?m with spectral resolutions <30 cm?1 from single snapshots. The computational spectrometer operates similarly to a spatial Fourier Transform infrared (FTIR) spectrometer with spectral reconstruction using a non-negative least squares fitting algorithm based on analytically computed wavelength response vectors determined from extracted physical thicknesses across the entire two-dimensional wedge. This computational technique resulted in performance and spectral resolutions exceeding those that could be achieved from Fourier techniques. With an additional imaging lenses and translational scanning, the system can be converted into a hyperspectral imager.

Abstract: A two-layer hybrid solid wedged etalon was fabricated and combined with a traditional imager to make a compact computational spectrometer. The hybrid wedge was made of Nb2O5 and Infrasil 302 and was designed to operate from 0.4-2.4 ?m. Initial demonstrations used a CMOS imager and operated from 0.4-0.9 ?m with spectral resolutions<30 cm?1 from single snapshots. The computational spectrometer operates similarly to a spatial Fourier Transform infrared (FTIR) spectrometer with spectral reconstruction using a non-negative least squares fitting algorithm based on analytically computed wavelength response vectors determined from extracted physical thicknesses across the entire two-dimensional wedge. This computational technique resulted in performance and spectral resolutions exceeding those that could be achieved from Fourier techniques. With an additional imaging lenses and translational scanning, the system can be converted into a hyperspectral imager.

Abstract: The electric pyrotechnic igniter of the present invention comprises a controlled power source providing low-voltage electricity to one or more remotely located, replaceable ignition elements which are housed in compression clips capable of holding the ignition elements into direct contact with firework fuses.

Abstract: The invention is a method and system for remotely testing network paths diagnosing problems in establishing a communications link between a call-routing component and a target component in a telecommunications network environment. The test system permits a call to be originated at any end office from a remote location. Originating a call at a customer's end office accurately recreates the customer's experience. A test method accurately reveals problems with a specific communications path. The last mile of a customer's connection can also be tested.

Abstract: The electric pyrotechnic igniter of the present invention comprises a controlled power source providing low-voltage electricity to one or more remotely located, replaceable ignition elements which are housed in compression clips capable of holding the ignition elements into direct contact with firework fuses.