Modulation transfer function determination of video capture cards by speckle patterns

2012 ◽  
Author(s):  
Antonio M. Pozo ◽  
José J. Castro ◽  
Manuel Rubiño
Keyword(s):  
Transfer Function ◽  
Modulation Transfer Function ◽  
Modulation Transfer ◽  
Video Capture ◽  
Speckle Patterns

Quantitative determination of modulation transfer function and detection quantum efficiency for standard and anti-reflection YAG scintillator slow-scan CCD-camera

1995 ◽  
Vol 53 ◽  
pp. 34-35
Author(s):  
A.L. Weickenmeier ◽  
W. Nüchter ◽  
J. Mayer
Keyword(s):  
Transfer Function ◽  
Quantum Efficiency ◽  
Modulation Transfer Function ◽  
Ccd Camera ◽  
Modulation Transfer ◽  
Spread Function ◽  
Full Discussion ◽  
Detection Quantum Efficiency ◽  
Image Details

Introduction The modulation transfer function (MTF) of a slow-scan CCD camera (Gatan modell 679 attached to our Zeiss EM 912 Omega) has been determined with high precision for the standard and the new anti-reflection YAG scintillator. It is shown that deconvolution of experimental patterns allows the reconstruction of image details down to pixel size. From the analysis of deconvoluted noise patterns we found that for this camera the detection quantum efficiency (DQE) is 0.6 in the typical working range of 300 to 3000 electrons per pixel and does not depend on the scintillator. A full discussion of this work can be found in.Experiment To determine the point spread function (PSF) we punched a hole in a sheet film holder which then was partially covered by one or two knife edges (slit). These masks were projected onto the scintillator. About 600 line scans perpendicular to the edge or slit were extracted and averaged to reduce noise (Fig. 1).

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