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  • Ultra-Narrow-Band Tunable Laserline Notch Filter (.pdf)
    We report on an angularly tunable laserline notch filter from 760 to 785 nm with optical density of 5.7, 3 dB bandwidth of 9 cm-1 (0.55 nm) and greater than 80% transmission. The notch filter is a single element composed of six bonded slanted reflective holographic gratings in glass.
  • Precision Infrared Narrow Bandpass and Dual Bandpass Filters Featuring Low OH-Band Absorption
    Alluxa's new precision infrared bandpass and dual bandpass filter technology brings new levels of performance with higher transmissions, steeper slopes, and flatter pass bands than traditional evaporated coatings.
  • Wired 8.09: Bright Switch
    there. What we have developed is a narrow-band filter that alters the signature. " Originally, Aerotech experimented with aluminum rods. "But now we have an inch-thick plate of epoxy that contains an intricate pattern of voids and tubes to tune the frequency. The tubes are about 1 millimeter in diameter
  • The Effect of High Stability Reference Oscillators on System Phase Noise
    ] = 61.6 dB). The use of phase-locked loop multipliers can mitigate some of this increase in phase noise because the phase-locked loop acts as a narrow band filter around the carrier. The single sideband filter bandwidth equals the phase-locked loop bandwidth, usually 10 to 100 kHz. The phase noise
  • Comet Hyakutake
    These are two images of the inner coma of Comet Hyakutake made on April 3 and 4, 1996, using the NASA Hubble Space Telescope Wide Field Planetary Camera 2 (WFPC2). The first one, shown in red, was taken through a narrow-band red filter that shows only sunlight scattered by dust particles

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