DOI 10.17586/0021-3454-2020-63-5-429-435
UDC 535.8, 681.78, 535.44
Synthesis and Analysis of Interference Coating Structures for an Augmented Reality System Based on a Lightguide Combiner
ITMO University, 197101, Saint-Petersburg, Russian federation; Professor
R. E. Zeigman
ITMO University, Faculty of Photonics and Optical Information;
T. A. Koneva
ITMO University, Faculty of Applied Optics;
G. E. Romanova
ITMO University, 197101, Saint Petersburg, Russian Federation; Associate professor
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Abstract. Results of synthesis of interference coating structures used in an augmented reality system based on a lightguide combiner are presented. The lightguide combiner is made up of prisms with original coatings applied to their faces. Optical characteristics of the coatings at different angles of radiation incidence are considered and the structures of the coatings including layers made of refractory oxides with high transparency in the visi-ble spectrum range are calculated. As a result of the synthesis, coatings consisting of layers of unequal and non-multiple thickness are obtained. It is shown that multilayer coatings based on dielectric layers of non-equal thickness provide a constant reflection (transmittance) coefficient in the spectral range of interest for a given range of incident radiation angles. Correct operation of the optical system with developed interference coatings is demonstrated by presented results of computer simulation.
Keywords: lightguide combiner, interference coating, dielectric layers, non-absorbing layers, reflection coefficient, angles of incidence range
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