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Updated: Feb 15, 2026

Phase Contrast and Differential Interference Contrast DIC Microscopy
Published on: August 6, 2008
Stroboscopic effect: contrast threshold function and dependence on illumination level
Abstract:
The stroboscopic visibility measure (SVM) is a method used to quantify the stroboscopic effect visibility in general illumination application. SVM has been defined previously based on a limited number of frequencies and participants. To validate and extend SVM, five perception experiments are presented, measuring the visibility threshold of light waveforms modulated at several frequencies, conducted in two different labs. A power function is fitted through the aggregated results to develop a stroboscopic effect contrast threshold function for a "standard observer," which can be used to normalize SVM. An additional experiment shows the dependency on illumination level, extending the validity of SVM to other applications.
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