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  • Multi-Spectral Imaging
    We report on a volume holographic imaging spectrometer (VHIS) system which allows retrieval of a scene's two-dimensional spatial information as well as its spectral information. This is performed using a transmission volume hologram and a simple rotary scanning mechanism. The system has
  • Improvements in Low Power, End window, Transmission-Target X-ray Tubes
    consistent performance from tube to tube. 2) Changes in the anode geometry have resulted in reduced spectral contamination from metal parts in the anode. 3) The electron beam position on the anode is primarily influenced by the filament placement relative to the cathode optic. Using finite-element
  • Thermography Enhances the Capabilities of Laser Transmission Welding (.pdf)
    . Using an FPA detector with a spectral sensitivity of 3.4 to 5 µm, the heat conduction during the welding process of flexible flat cables is monitored. The influence of copper parts within the cable on the welding properties is analyzed. A different setup offers the possibility to measure
  • Advanced Topics on Erbium Doped Fibers for High Performance Amplifiers (.pdf)
    be under good control. This paper reviews the current status and recent progress on erbium doped fibers, illustrates C and L-band spectral characteristics resulting from different doping compositions, presents some approaches for efficient high power amplifiers, and discusses some EDF nonlinear effects
  • Optimum Low Pass Filter Bandwidth for Generating Signals
    Optical Duobinary modulation has been illustrated to have higher spectral efficiency in high capacity transmission [1], and have better tolerance to chromatic dispersions due to narrower spectral bandwidth [2]. It also enjoys higher threshold for the onset of stimulated Brillouin scattering (SBS
  • Using Noise for RF Receiver Built-In Test Applications
    of BIT systems using noise currently exist. This article identifies these uses at the system architecture level and describes the differing attributes of the noise source required for each. Perhaps the most common application using noise is to test the RF spectral gain/loss response of the front-end
  • Shape and Refractive Index Recovery from Single-View Polarisation Images
    . into the air. The diffuse polarisation of the reflection process. is modelled using a Transmitted Radiance Sinusoid curve. and the Fresnel transmission theory. We provide a method. of estimating the azimuth angle of surface normals from the. spectral variation of the phase of polarisation
  • Engineering Aspects of Radiation Theory (.pdf)
    of radiation is not easy to define, as both corpuscular and oscillatory aspects are involved. The electromagnetic energy that is emitted from the surface of a heated body is called thermal radiation, and consists of a continuous spectrum of frequencies extending over a wide range. The spectral
  • Infrared Viewer Frequently Asked Questions
    Power Technology, Inc.'s infrared viewers work by focusing the infrared light reflected by or emitted from a chosen subject onto the image tube. An electron image is generated in accordance with the incident intensity and the S-1 spectral sensitivity of the photocathode material. The IR viewer
  • Glass Material Specifications
    ) for a specific spectral range. For instance, a higher index of refraction generally bends light more efficiently so there is less of a need of curvature in the lens. Spherical aberration is less present in lenses with higher indices of refraction, while light travels faster through materials with lower

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