Measurement of the refractive index using an autocollimation goniometer
https://doi.org/10.17586/2226-1494-2023-23-5-1073-1076
Abstract
The paper proposes a modified method for measuring the refractive index of a triangular prism using an autocollimation angle measuring system designed to measure angles formed by flat surfaces of objects. The method involves using a fixed mirror to reflect the refracted beam, measurement of the angles of incidence of the beam on the face of the prism corresponding to the autocollimation positions and calculating the refractive index of the prism material using the solution of a system of equations. The paper presents the experimental study results for a triangular prism made of K8 optical glass using the proposed method, and a comparison of the results with the readings obtained using the State Primary Standard of the Refractive Index Unit GET 138-2021. The proposed method makes it possible to simplify the process of measuring the refractive index since there is no need to measure the angle of deviation of the beam.
About the Authors
A. I. Yurin
HSE University ; All-Russian Research Institute for Optical and Physical Measurements
Russian Federation
Russian Federation
Alexander I. Yurin — PhD, Associate Professor; Senior Researcher
sc 15756657400
Moscow, 101000; Moscow, 119361
G. N. Vishnyakov
All-Russian Research Institute for Optical and Physical Measurements ; Bauman Moscow State University
Russian Federation
Russian Federation
Gennady N. Vishnyakov — D. Sc., Professor, Head of Laboratory; Professor
sc 7003644474
Moscow, 119361; Moscow, 105005
V. L. Minaev
HSE University ; All-Russian Research Institute for Optical and Physical Measurements
Russian Federation
Russian Federation
Vladimir L. Minaev — D. Sc., Head of Department; Professor
sc 7007026957
Moscow, 101000; Moscow, 119361
M. I. Krasivskaya
HSE University
Russian Federation
Russian Federation
Maria I. Krasivskaya — Senior Lecturer
sc 57215353698
Moscow, 101000
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Review
For citations:
Yurin A.I., Vishnyakov G.N., Minaev V.L., Krasivskaya M.I. Measurement of the refractive index using an autocollimation goniometer. Scientific and Technical Journal of Information Technologies, Mechanics and Optics. 2023;23(5):1073-1076. (In Russ.) https://doi.org/10.17586/2226-1494-2023-23-5-1073-1076
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