Imaging of an Object Behind Randomly Distributed Particles Using Coherent Illumination

摘要

Experimental studies are presented of the imaging of an object behind randomly distributed spherical particles using coherent illumination. The object, which has black stripes on white diffuse paper with different spatial wavelengths, is placed behind a scattering cell and illuminated by an expanded helium neon laser beam. Results are obtained for different particle sizes and optical distances. The differences between the front and back illumination are studied. The diffusion approximation is used to calculate the modulation transfer function for the front illumination. Keywords: Imaging; Discrete scatterers; Ramdom media; Diffusion; Modulation transfer function; Reprints.