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ISSN 2500-0381 (online version)
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vol 67 / April, 2024
Article

DOI 10.17586/0021-3454-2015-58-7-537-542

UDC 681.7.062

AUTOCOLLIMATION METHOD FOR MEASURING THE FOCAL DISTANCE OF A LENS

A. G. Ershov
S. I. Vavilov State Optical Institute; Senior Researcher


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Reference for citation: Ershov A. G. Autocollimation method for measuring the focal distance of a lens //Izvestiya Vysshikh Uchebnykh Zavedeniy. Priborostroenie. 2015. Vol. 58, N 7. P. 537—542 (in Russian).

Abstract. An autocollimation method for measuring the focal distance of a long-range lens Apo-Mars-7 at the wavelength of 1.064 um is described. Factors affecting the final measurement uncertainty are considered. Limitations of the method application to other wavelengths and lenses are specified.
Keywords: focal distance, measurement, uncertainty