DOI 10.17586/0021-3454-2021-64-2-137-142
UDC 535.317
APPLICATION OF COMPUTER ISOPHOTOMETRIC METHOD IN INTERFEROMETRY
State Educational Establishment of High Professional Education “Saint-Petersburg State University of Information Technologies, Mechanics and Optics”; Professor
T. V. Tochilina
ITMO University, Saint Petersburg, 197101, Russian Federation; Senior Lecturer
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Abstract. The problem of increasing the accuracy of interference measurements is solved by selecting the lines of the centers of interference bands – isophots. The interferogram can be obtained, for example, using a Linnik micro-interferometer. The principles of isophotometry used in computer processing of interferograms are considered. Isophotometry is based on the use of an image receiver – analyzer that performs interference image conversion with the implementation of the comb-type conversion function. Due to the use of this transformation, an increase in the accuracy of interference measurements by a factor of 5–10 is achieved.
Keywords: Linnik microinterferometer, accuracy, interferogram, isophotometry, isophota
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