← Back to Tools & Sims

Monte Carlo Photon Transport Simulation

Simulates photon propagation through a scattering/absorbing medium. Photons launch from the source (left), scatter via Henyey-Greenstein phase function, and are detected if they re-emerge at the surface within the detector radius. Detected paths are rendered on the plot.

Parameters

Photons launched

μ_a — Absorption cm⁻¹

cm⁻¹

μ_s — Scattering cm⁻¹

cm⁻¹

g — Anisotropy −1 to 1

Source–Detector Distance cm

Detector Radius cm

Max Depth Shown cm

Photons launched: —

Photons detected: —

Detection rate: —

Mean free path: — cm

Photon Paths (detected only)

Detected path (shallow)

Detected path (deep)

Mean path (avg x per depth)

Source / Detector

Step length: d = −ln(ξ) / (μ_a + μ_s) | Survival weight: w ← w · μ_s / (μ_a + μ_s) | Scattering: Henyey-Greenstein phase function | Roulette threshold: 0.001