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Showing 1 results for Cut-Off Frequency

Mr Amir Hossein Shahbazi, Prof. Khosro Madanipour, Prof. Ata Koohian,
Volume 9, Issue 2 (11-2015)
Abstract

Defocusing effects in modulation transfer function (MTF) measurement of charge coupled device (CCD) cameras is the main focus of current paper. We introduce measuring Point-spread function (PSF) in order to calculate the MTF and further more we will study the shape of MTF and its cut-off frequency by adjusting the lens focusing in different locations. A collimated white light LED by broadband spectra is used as source and our results shows that the cut-off frequency is related to defocusing.



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