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- W2017109654 abstract "It has been reported recently that conventional methods for measuring the contrast ratio of display devices using small dark spots can provide inaccurate data if flare in lenses and other optical components is not taken into account. In this paper, we describe a method for reliable measurements of small-spot contrast ratios based on a collimated probe specially designed and constructed to minimize the signal contamination to less than 10−4 of the bright field. We show that this method can be used to measure the luminance of small circular targets to characterize the veiling glare of cathode-ray tubes. We compare ring response functions obtained for monochrome and color monitors and explain the differences between them in terms of the relative weight of the electron back-scattering and optical components of veiling glare. The method is also useful for characterizing crosstalk in large size active-matrix liquid crystal displays, by measuring luminance changes in small square targets due to variations in the background intensity. Our results suggest that even for medium size arrays, a difference of 1% can be found in the luminance of the small target due to changes in the background luminance." @default.
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- W2017109654 date "2002-09-01" @default.
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- W2017109654 title "Accurate small-spot luminance measurements" @default.
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- W2017109654 doi "https://doi.org/10.1016/s0141-9382(02)00036-7" @default.
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