| Abstract: | By the example of a time-averaged recording of the hologram of a focused image of a surface executing simple harmonic oscillation in its own plane, and diffusely scattering light, an analysis in the Fresnel approximation is made of the formation of an interference pattern for determining the amplitude of the oscillation. Theoretically and experimentally, it is shown that in the case of illuminating the scattering surface with coherent diffusely scattered radiation, the interference pattern is localized in the plane of formation of the Fourier image of the surface scattering the light. In the process, the size of the field in the Fourier plane is magnified, due to the amplification of the angular spectrum of the scattered waves. In monitoring the amplitude of the oscillation, this permits the sensitivity threshold to be lowered.V. V. Kuibyshev State University, Tomsk. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 30–34, November, 1992. |
