Intensified digital video system for speckle imaging

E. Keith Hege; Richard H. Cromwell; Curt N. Blair; Derick Rill; Peter R. Vokac

doi:10.1117/12.19322

1 August 1990 Intensified digital video system for speckle imaging

E. Keith Hege, Richard H. Cromwell, Curt N. Blair, Derick Rill, Peter R. Vokac

Proceedings Volume 1237, Amplitude and Intensity Spatial Interferometry; (1990) https://doi.org/10.1117/12.19322
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

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.

Citation Download Citation

E. Keith Hege, Richard H. Cromwell, Curt N. Blair, Derick Rill, and Peter R. Vokac "Intensified digital video system for speckle imaging", Proc. SPIE 1237, Amplitude and Intensity Spatial Interferometry, (1 August 1990); https://doi.org/10.1117/12.19322

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