A. M. Lyalikov

Bio: A. M. Lyalikov is an academic researcher from Hrodna State University. The author has contributed to research in topics: Holographic interferometry & Interferometry. The author has an hindex of 2, co-authored 3 publications receiving 11 citations.

Improvement of accuracy of interferometric measurement of wedge angle of plates

Abstract: A method is proposed for improving the accuracy of measuring the wedge angle of transparent plates using a lateral-shear holographic interferometer. Consecutive processing of a pair of interferograms with doubled number of interference fringes leads to reduction of the observational error by a factor of two compared to traditional interferometric methods. Data on the experimental validation of the method are presented.

Highly sensitive interferometric testing of deviation of the wedge angle of transparent plates

Abstract: To improve the accuracy of the interferometric method of testing the wedge angle of a transparent plate, we propose using nonlinear recording of holograms of the reference and tested plates on different carriers and creating interference patterns that map the deviation of the angle, using higher orders of light diffraction on the holograms, with improved sensitivity. The increasing accuracy of the interferometric method of testing is provided by waves diffracted on holograms of the reference and tested plates in higher diffraction orders. Results of experimental testing of the method are presented.

Combination of measurement and control procedures in laser Fizeau interferometers

Abstract: A method to combine the procedures of measurement and control of transparent wedged plates for Fizeau interferometers with object and reference channels positioned on one optical axis is proposed and experimentally tested. The results of measuring control of a glass wedged plate are presented.

A ultra-small-angle self-mixing sensor system with high detection resolution and wide measurement range

Abstract: The self-mixing technique based on the traditional reflecting mirror has been demonstrated with great merit for angle sensing applications. Here we demonstrate a modified self-reflection-mixing angle measurement system by combine a right-angle prism to self-mixing angle measurement. In our system, the wavelength is crucial to the angle measurement resolution. For a microchip solid-state laser, the measurement resolution can reach 0.49 mrad, while the resolution for the He-Ne laser is 0.53 mrad. In addition, the ranges in the system with the microchip solid-state laser and He-Ne laser are up to 22 mrad and 24.9 mrad respectively. This modified angle measurement system effectively combines the advantage of self-mixing measurement system with a compact structure, providing interesting features such as of high requisition of resolution and precision.

Highly sensitive interferometric testing of deviation of the wedge angle of transparent plates

Abstract: To improve the accuracy of the interferometric method of testing the wedge angle of a transparent plate, we propose using nonlinear recording of holograms of the reference and tested plates on different carriers and creating interference patterns that map the deviation of the angle, using higher orders of light diffraction on the holograms, with improved sensitivity. The increasing accuracy of the interferometric method of testing is provided by waves diffracted on holograms of the reference and tested plates in higher diffraction orders. Results of experimental testing of the method are presented.

Improvement of the sensitivity of measurements in the formation of holographic interferograms of wedge plates

Abstract: We consider the method for improving the sensitivity of measurements in the formation of aberration-free interference images of wedge plates, which do not require a priori knowledge of the position of the wedge edge. It is shown that the sensitivity in the measurement of the wedge angle in real time interferometry is doubled in the case of recording on the reference hologram of the wedge plate followed by its reconstruction by the object light wave that has passed through the wedge plate rotated through 180° relative to the normal. It turns out that recording of a pair of holograms of the wedge plate, one of which is the image of the wedge plate turned through 180° relative to the normal to the plate, makes it possible to increase the sensitivity of measurements by more than an order of magnitude by eliminating the systematic components of measuring errors due to complete compensation of aberrations. The results of experimental testing of the method are considered.

Interferometry of phase objects combining measurement and testing procedures

Abstract: A possibility of combining measurement and testing procedures in interference studies of phase objects is shown for the first time. The possibility of forming several independent interferograms corresponding to the regions of measuring and testing parameter in one interference pattern has been theoretically substantiated and experimentally confirmed for a certain class of phase objects.