INVARIANT TO RECEIVING-TRANSMITTING FUNCTION NONLINEARITY NATURE PHASE TRIANGULATION METHOD
V. O. Zuev, S. V. Dvoynishnikov, V. G. Meledin, G. V. Bakakin
Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: phase triangulation, phase images decoding, receiving-transmitting function
Abstract
A phase triangulation method, invariant to receiving-transmitting function nonlinearity nature, is proposed for objects geometric parameters precision control in the optical light source and receiver limited dynamic range conditions. The method is based on the algorithm of the closed area shape minimization, formed by the values for given phase shifts of recorded intensity and generated by the source brightness. It was shown in the work that the proposed method provides a similar error level when the receiving-transmitting function is linear and high metrological characteristics when it has nonlinearities and frequency response of the measurement complex source and receiving optical systems is not ideal.
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