HOLOGRAPHIC METHOD FOR MEASURING REFRACTION INDEX OF DISPERSION MEDIUM PARTICLES Russian patent published in 1998 - IPC

FIELD: holography, in particular, measuring refraction index of transparent and semitransparent particles in dispersion medium. SUBSTANCE: method involves illumination of medium by coherent light, generation of its real image near to photo sensitive material using optical system, detection of hologram of this image, redisplaying hologram and smooth alternation of focus of zooming optical system in order to detect disperse particle and focusing point of beam refracted by particle in redisplayed holographic image, measuring longitudinal coordinates of central section of particle and focusing point of beam refracted by it, and measuring size of particle. Measured data helps to determine refraction index of particle in dispersion medium. EFFECT: possibility to define different types of microparticles, increased reliability of detection of microparticle in holographic image of dispersion medium. 5 dwg