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

0399474 - FZÚ 2014 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Nožka, Libor - Pech, M. - Mandát, D. - Hrabovský, M. - Schovánek, P. - Palatka, Miroslav
Using Geant4 toolkit for simulations of optical systems with roughisotropic surfaces using BRDF profiles.
Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics /18./. Bellingham: SPIE, 2012 - (Peřina jr., J.; Nožka, L.; Hrabovský, M.; Senderáková, D.; Urbańczyk, W.). Proceedings of SPIE, 8697. ISBN 978-0-8194-9481-8. ISSN 0277-786X.
[Czech-Polish-Slovak optical conference on wave and quantum aspects of contemporary optics /18./. Ostravice (CZ), 03.09.2012-07.09.2012]
Grant CEP: GA TA ČR TA01010517
Výzkumný záměr: CEZ:AV0Z10100522
Klíčová slova: scattering measurements * BRDF * rough surfaces * Geant4
Kód oboru RIV: BH - Optika, masery a lasery

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 (Bidirectional Reflectance Distribution Function) 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 scatterometer.
Trvalý link: http://hdl.handle.net/11104/0229264