HOLOGRAM-BASED CORRELATION METER Russian patent published in 1994 - IPC

FIELD: optical computer engineering. SUBSTANCE: processed image is shown on screen of monochrome cathode-ray tube 1 which is placed in input plane of correlation meter. Image runs through light filter 2, stop aperture 3, hologram filter 4 and refracting prism 5 which refracting angle depends on frequency of carrier grid of hologram filter to compensate divergence of different wavelength light beams which were diffracted at grid of hologram filter. Projecting lens 6 transmits signals to photodetector 7. Increased resolution of correlation meter due to specifically adjusted prism results in increased precision of correlation meter. EFFECT: increased precision of image processing. 2 dwg