Using a Monte Carlo method, we investigate the effect of a turbid medium on image transmission by means of the modulation transfer function approach. We present results that refer to a medium that consists of a random distribution of water spherical particles in air. We analyze the effect of geometric conditions (medium width and position) and source characteristics (Lambertian, beam emission). We present results for small spheres (Rayleigh scattering) and spheres (1.0-μm diameter) that are not small in comparison with the wavelength λ = 0.6328 μm. Numerical data show a large modulation transfer function dependence on the source emission aperture and a substantial independence of the medium width for a fixed value of the optical depth. In accordance with reciprocity principles, we test an inverse scheme of Monte Carlo calculation, the advantage of this scheme being a substantial reduction in calculation time.
© 1993 Optical Society of America
Original Manuscript: June 3, 1992
Published: May 20, 1993
Piero Bruscaglioni, Paolo Donelli, Andrea Ismaelli, and Giovanni Zaccanti, "Monte Carlo calculations of the modulation transfer function of an optical system operating in a turbid medium," Appl. Opt. 32, 2813-2824 (1993)