Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Vadim V. Cherkashin"'
Autor:
Vadim V. Cherkashin, K. A. Ivanova, Alexander G. Poleshchuk, V. I. Trunov, K. V. Gubin, Andrey G. Sedukhin
Publikováno v:
Optoelectronics, Instrumentation and Data Processing. 54:19-25
Results of an experimental study of the density distribution in a small-size (1–2 mm in diameter) supersonic gas jet in vacuum are reported. The measurements are performed by the developed Shack–Hartmann wavefront sensor, which consists of a micr
Publikováno v:
Optoelectronics, Instrumentation and Data Processing. 53:255-263
This paper presents a method of improving the accuracy of a circular laser system in fabrication of large-diameter diffractive optical elements by means of a polar coordinate system and the results of their use. An algorithm for correcting positionin
Publikováno v:
Optoelectronics, Instrumentation and Data Processing. 53:123-130
A method is developed to ensure precise alignment of the origin of a polar coordinate system in which the laser beam position is defined in writing diffractive optical elements with the optical workpiece rotation axis. This method is used to improve
Publikováno v:
Holography: Advances and Modern Trends VI.
The development of specialized non-destructive methods for monitoring of microstructured optical elements is necessary for introduction of diffractive, micro-optical and conformal optical elements into production. However, a wide variety of such elem
Autor:
L. N. Lavrinova, V. P. Lukin, Victor P. Korolkov, Alexander G. Poleshchuk, N. N. Botygina, Ruslan K. Nasyrov, Vadim V. Cherkashin, O. N. Emaleev
Publikováno v:
Optoelectronics, Instrumentation and Data Processing. 45:161-170
A Shack-Hartmann type wavefront sensor designed on the basis of a low-aperture off-axis diffraction lens array is described. Tests experiments showed that the sensor is capable of measuring wavefront slopes at array subapertures of size 640×640 µm
Autor:
Sergei A. Kokarev, Andrei A. Kharissov, Vadim V. Cherkashin, Valerii P. Kiryanov, Alexander G. Verhoglyad, Aleksei V. Kiryanov, Evgeny G. Churin, Alexander G. Poleshchuk, Voldemar Petrovich Koronkevich, Victor P. Korolkov
Publikováno v:
Applied optics. 38(8)
A precision laser pattern generator for writing arbitrary diffractive elements was developed as an alternative to Cartesian coordinate laser/electron-beam writers. This system allows for the fabrication of concentric continuous-relief and arbitrary b
Testing optical surfaces by high-precision diffractive null lenses with integrated reference surface
Publikováno v:
SPIE Proceedings.
Fizeau interferometers with an additional diffractive optical element are frequently used for measuring spherical and aspherical surfaces. We present a new design, were the Fizeau principle is now perfectly fulfilled, by generating reference and meas
Publikováno v:
Diffractive Optics and Micro-Optics.
A method for certifying the direct writing process for computer generated holograms is offered and experimentally validated. This method effectively reveals both random errors and slow drift during writing process. The techniques are demonstrated wit
Autor:
Johann Westhauser, Chuck Wu, Thomas Schoder, Anatoly I. Malyshev, Alexander G. Poleshchuk, Victor P. Korolkov, Hans J. Tiziani, Vadim V. Cherkashin, Christof Pruss
Publikováno v:
SPIE Proceedings.
In the last years the application of gray-scale masks (GSM) for diffractive optics manufacturing attracts attention because of cost-effective possibility to produce a lot of diffractive elements on hard and heat-resistant thermally stable substrates.
Autor:
Vadim V. Cherkashin, Ruslan V. Shimansky, Victor P. Korolkov, Andrey A. Kharissov, Alexander G. Poleshchuk, Dmitry Denk
Publikováno v:
SPIE Proceedings.
The photolithography using gray-scale masks (GSM) with multilevel transmittance is now one of promising ways for manufacturing of high efficiency diffractive optical elements and microoptics. Such masks can be most effectively fabricated by laser or