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Published April 1, 1998 | Published
Journal Article Open

Rapid modeling of diffuse reflectance of light in turbid slabs


An efficient and accurate hybrid model of the Monte Carlo technique and the diffusion theory was developed to simulate the diffuse reflectance of light in a turbid slab due to an infinitely narrow light beam. The narrow beam was normally incident on the top surface of the slab. The hybrid model was accurate in modeling the diffuse reflectance near the light source, where the diffusion theory was most inaccurate. The hybrid model was much faster than a pure Monte Carlo method by a factor as great as several hundred, depending on the optical properties, the thickness of the slab, and the settings of the hybrid and the Monte Carlo computations. The computation speed of the hybrid model was insensitive to the optical properties of the medium, in contrast to the pure Monte Carlo technique. The diffusion theory was accurate in modeling both the diffuse reflectance far from the source and the diffuse transmittance. The hybrid model and the diffusion theory should be used in conjunction for efficient and accurate computation of diffuse reflectance and diffuse transmittance.

Additional Information

© 1998 Optical Society of America. Received September 10, 1997; revised manuscript received December 4, 1997; accepted December 8, 1997. This project was sponsored in part by the National Institutes of Health grants R29 CA68562 and R01 CA71980, The Whitaker Foundation, and the Office of Vice President for Research at Texas A&M University.

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