340
4 Speckle-Optical Methods and Devices for Studying …
Fig. 4.13 Dependence of the ratio of amplitudes of spectral harmonics b 1/ b 2 on the changes of
the width of illuminating lens for different diffusor oscillation amplitudes. Reprinted from [2] with
permission
Numerical simulations of dependence of spectral harmonics ratio b 2 /b 1 on parameter A are presented in Fig. 4.14. Parameter A is determined by ratio of diffuser
oscillation amplitude h to the length of the waist of the focusing length. Dependence
of the given parameter A on oscillation amplitude h and waist width of lens W 0 are
shown in Fig. 4.15. It is seen in the graphs that parameter A determines the range
and accuracy of measurements of the object oscillation amplitude using this method
Fig. 4.14 Dependence of amplitude ratio of spectral harmonics b 1/ b 2 on parameter A. Reprinted
from [2] with permission
4 Speckle-Optical Methods and Devices for Studying …
Fig. 4.13 Dependence of the ratio of amplitudes of spectral harmonics b 1/ b 2 on the changes of
the width of illuminating lens for different diffusor oscillation amplitudes. Reprinted from [2] with
permission
Numerical simulations of dependence of spectral harmonics ratio b 2 /b 1 on parameter A are presented in Fig. 4.14. Parameter A is determined by ratio of diffuser
oscillation amplitude h to the length of the waist of the focusing length. Dependence
of the given parameter A on oscillation amplitude h and waist width of lens W 0 are
shown in Fig. 4.15. It is seen in the graphs that parameter A determines the range
and accuracy of measurements of the object oscillation amplitude using this method
Fig. 4.14 Dependence of amplitude ratio of spectral harmonics b 1/ b 2 on parameter A. Reprinted
from [2] with permission