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DOI: 10.17586/1023-5086-2025-92-10-41-51
УДК: 681.7.013.82, 535.317.64
Wide-angle lens distortion influence on modulation transfer function measurement error
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Леонов М.Б., Терлецкий Е.С., Серегин Д.А. Острун А.Б. Влияние дисторсии широкоугольных объективов на погрешность измерения функции передачи модуляции // Оптический журнал. 2025. Т. 92. № 10. С. 41–51. http://doi.org/10.17586/1023-5086-2025-92-10-41-51
Leonov M.B., Terletsky E.S., Seregin D.A., Ostrun A.B. Wide-angle lens distortion influence on modulation transfer function measurement error [in Russian] // Opticheskii Zhurnal. 2025. V. 92. № 10. P. 41–51. http://doi.org/10.17586/1023-5086-2025-92-10-41-51
Subject of study. Wide-angle lens distortion influence on modulation transfer function measurement results and measurement error. Aim of study. Determination of correlation between distortion, field of view and modulation transfer function for wide-angle lens off-axis measurements error reduction. Method. Correction factor calculation with consideration to distortion and field of view. Wide-angle lens measurements on test bench with collimator. Main results. Collimator and object slit image size formulas for wide-angle lens measurements are presented with consideration to distortion and field of view. Slits’ image size is using to calculate modulation transfer function correction factor and affects measurement results. Modulation transfer function systematic error component can assume a value up to 10% due distortion. If tolerance for off-axis slit image measurement error is ±0,001 mm, then modulation transfer function measurement error will be 0,01 rel.un. Practical significance. Obtained formulas considers distortion and field of view for wide-angle lens modulation transfer function measurements. Proposed calculation method can be used to determine the field of view where distortion can be ignored, as well as estimate modulation transfer function systematic error component for off-axis measurements.
optic system, lens, angular field of view, distortion, modulation transfer function, measurement error, correction factor
Acknowledgements:authors thanks Alexander A. Starkov (Vavilov State Optical Institute) for consultation the research.
OCIS codes: 120.4630,120.4800
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