E. S. Voronin

Image up-conversion and holography

The transverse and longitudinal resolution of image UP-conversion is considered. Experimental data concerning image UP-conversion and holography from 1.06 μm to 0.53 μm are presented. Experimental values of resolution are in good agreement with theoretical estimates.

The Influence of the Radiation Spectrum Bandwidth on the Resolution of an Image Up-Converter

The influence of the infra-red spectrum bandwidth on the transverse resolution of an image up-converter is investigated. It is shown that by suitable placing of the infra-red image plane, the deterioration of the resolution due to the infra-red spectrum bandwidth does not occur.

The conversion of infra-red radiation into visible in a proustite crystal when the pump beam and the infra-red signal beam are perpendicular to each other

The conversion is considered of infra-red radiation into visible in a proustite crystal with the pump and signal waves perpendicular to each other. The angular and spectral parameters as well as the efficiency of such interactions are determined.The advantages of this interaction are discussed.

Measurement of the correlation radii of intensity fluctuations in propagation of light in the atmosphere

The correlation radii of intensity fluctuations were determined for the propagation of light along short atmospheric paths. The values of the correlation coefficient were determined for the components of the fluctuation spectrum in the 100–400 Hz range. Changes in the correlation radius due to variations in the weather conditions were determined.

Bragg diffraction of λ = 10.6 μ radiation by acoustic waves in proustite

The Bragg diffraction of λ = 10.6 μ radiation by longitudinal acoustic waves was observed in proustite. The angular characteristics of the radiation entering and leaving the proustite crystal were determined. The number of independent resolvable elements at the exit from the crystal was 20. The ratio of the intensity of the diffracted radiation to the intensity of the incident beam was 310–3.