Zobrazeno 1 - 10
of 110
pro vyhledávání: '"Julia Sheldakova"'
Publikováno v:
Photonics, Vol 10, Iss 10, p 1147 (2023)
Atmospheric turbulence causes refractive index fluctuations, which in turn introduce extra distortions to the wavefront of the propagated radiation. It ultimately degrades telescope resolution (in imaging applications) and reduces radiation power den
Externí odkaz:
https://doaj.org/article/b18ef324778f43c2818412c0fe77274b
Autor:
Ilya Galaktionov, Julia Sheldakova, Alexander Nikitin, Vladimir Toporovsky, Alexis Kudryashov
Publikováno v:
Algorithms, Vol 16, Iss 7, p 337 (2023)
The hybrid model for analyzing distortions of a laser beam passed through a moderately scattering medium with the number of scattering events up to 10 is developed and investigated. The model implemented the Monte Carlo technique to simulate the beam
Externí odkaz:
https://doaj.org/article/3e6cc6510a174dfb919accc0c873158e
Publikováno v:
Photonics, Vol 9, Iss 5, p 351 (2022)
This paper presents a FPGA-based closed-loop adaptive optical system with a bimorph deformable mirror for correction of the phase perturbation caused by artificial turbulence. The system’s operating frequency of about 2000 Hz is, in many cases, suf
Externí odkaz:
https://doaj.org/article/651470295c4143468783846c8a762d0e
Autor:
Valentina Klochkova, Julia Sheldakova, Ilya Galaktionov, Alexander Nikitin, Alexis Kudryashov, Vadim Belousov, Alexey Rukosuev
Publikováno v:
Photonics, Vol 9, Iss 5, p 322 (2022)
The low-frequency component of the distortions caused by both the atmospheric turbulence and the behavior of the telescope itself has been studied. A corrector for the position of the center of the star image has been developed and is being used in f
Externí odkaz:
https://doaj.org/article/ae33b0b058084092a087659da3aefd47
Autor:
Ilya Galaktionov, Alexander Nikitin, Julia Sheldakova, Vladimir Toporovsky, Alexis Kudryashov
Publikováno v:
Photonics, Vol 9, Iss 5, p 296 (2022)
The rarely considered case of laser beam propagation and focusaing through the moderately scattering medium was researched. A phase-only spatial light modulator (SLM) with 1920×1080 pixel resolution was used to increase the efficiency of focusing of
Externí odkaz:
https://doaj.org/article/046f2b3f699d48b394b2cbb6d0cb7821
Autor:
Vadim Samarkin, Alexander Alexandrov, Ilya Galaktionov, Alexis Kudryashov, Alexander Nikitin, Alexey Rukosuev, Vladimir Toporovsky, Julia Sheldakova
Publikováno v:
Applied Sciences, Vol 12, Iss 3, p 1144 (2022)
The bimorph deformable mirror with a diameter of 320 mm, including 127 control electrodes, has been developed and tested. The flatness of the initial mirror surface of about 1 μm (P-V) was achieved by mechanically adjusting the mirror substrate fixe
Externí odkaz:
https://doaj.org/article/9e66e638df2a42c5a4ca4a8ce162b65e
Autor:
Alexey Rukosuev, Alexander Nikitin, Vadim Belousov, Julia Sheldakova, Vladimir Toporovsky, Alexis Kudryashov
Publikováno v:
Applied Sciences, Vol 11, Iss 24, p 12112 (2021)
The results of a study of the wavefront distortions of laser radiation caused by artificial turbulence obtained in laboratory conditions using a fan heater are presented. Decomposition of the wavefront in terms of Zernike polynomials is a standard pr
Externí odkaz:
https://doaj.org/article/85a5940d957149dabc7b4a33b07e30f8
Autor:
Vladimir V. Toporovsky, Alexis Kudryashov, Julia Sheldakova, Ilya Galaktionov, Vadim Samarkin
Publikováno v:
28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics.
Autor:
Ilya Galaktionov, Julia Sheldakova, Alexander Nikitin, Vladimir V. Toporovsky, Alexis Kudryashov
Publikováno v:
Laser Beam Shaping XXII.
Publikováno v:
Laser Beam Shaping XXII.