1 August 1990 Intensified digital video system for speckle imaging
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Abstract
A four-stage Proxitronic® image intensifier system with digital video readout provides high detective quantum efficiency photon-counting imaging. The objective is to demonstrate a prototype system for further evaluation of image intensifier capabilities in speckle imaging applications, and to demonstrate an observing system opumized for use in diffraction- and statistics-limited imaging with accurate noise bias calibration at the lowest possible photon flux with the highest possible photon-counting efficiency. The phosphor image is Kowa® transfer-lens coupled to a Pu!nix® CCD video camera at 2: 1 reduction to preserve high spatial frequency response. The data are digitized at the telescope and fiber-optic coupled synchronously to a digital video processor which can operate with non-interlaced full-frame subtraction in linear grey-scale analog mode as well as in photon-centroiding event-counting mode. A MathCop2® 18MHz floating point math coprocessor provides quick-look capability for near-realtime inspection of image spectra or Knox-Thompson cross-spectra, using FFF methods for grey-scale data or vector autocorrelation for event data.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
E. Keith Hege, Richard H. Cromwell, Curt N. Blair, Derick Rill, Peter R. Vokac, "Intensified digital video system for speckle imaging", Proc. SPIE 1237, Amplitude and Intensity Spatial Interferometry, (1 August 1990); doi: 10.1117/12.19322; https://doi.org/10.1117/12.19322
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KEYWORDS
Video

Image intensifiers

Imaging systems

Telescopes

Video processing

Sensors

Cameras

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