Using Geant4 toolkit for simulations of optical systems with rough isotropic surfaces using BRDF profiles

Libor Nozka; Miroslav Pech; Dusan Mandat; Miroslav Hrabovský; Petr Schovánek; Miroslav Palatka

doi:10.1117/12.2008725

18 December 2012 Using Geant4 toolkit for simulations of optical systems with rough isotropic surfaces using BRDF profiles

Libor Nozka, Miroslav Pech, Dusan Mandat, Miroslav Hrabovský, Petr Schovánek, Miroslav Palatka

Author Affiliations +

Proceedings Volume 8697, 18th Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 86970J (2012) https://doi.org/10.1117/12.2008725
Event: 18th Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2012, Ostravice, Czech Republic

Abstract

The Geant4 toolkit is important and popular software for simulation of physics processes in various areas. In spite of its primary application in high-energy particle physics and astrophysics, it is also widely used for studies in space and medical science. The accuracy of Geant4 simulations depends on the credibility of both models of physics processes and the description of materials involved in simulations. In this work, model of rough isotropic optical surfaces is extended to Geant4 providing with the knowledge of their in-plane BRDF scatter profile. We updated Geant4’s algorithm responsible for tracking photon on a boundary of two optical environments to reflect the scatter profile of isotropic optical surfaces. To examine reliability of models, we measured BRDF profile of Tyvek, mylar and glass mirror samples by means of CASI measurement systems. We used obtained BRDF profile to setup optical properties of model counterpart of measured samples. Then we compared scattered profile in simulation with real one.

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Libor Nozka, Miroslav Pech, Dusan Mandat, Miroslav Hrabovský, Petr Schovánek, and Miroslav Palatka "Using Geant4 toolkit for simulations of optical systems with rough isotropic surfaces using BRDF profiles", Proc. SPIE 8697, 18th Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 86970J (18 December 2012); https://doi.org/10.1117/12.2008725

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KEYWORDS

Bidirectional reflectance transmission function

Particles

Monte Carlo methods

Reflection

Mirrors

Physics

Sensors

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