Modelling reflections from exact surfaces in CameoSim

A. A. Mitchell; J. M. Brewster; A. W. Haynes; P. A. Richardson

doi:10.1117/12.724823

30 April 2007 Modelling reflections from exact surfaces in CameoSim

A. A. Mitchell, J. M. Brewster, A. W. Haynes, P. A. Richardson

Proceedings Volume 6543, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XVIII; 654304 (2007) https://doi.org/10.1117/12.724823
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

Reflections such as glint are only seen over a small angular range around the Bi-directional Reflectance Difference Function (BRDF) specular lobe. When modelling a target for input to detection codes it is essential that these types of reflection are modelled accurately as they can have a significant impact on detection range. This paper investigates the use of CameoSim to model the glint effects from 3-D curved shapes in the 3-5µm band. Methods investigated to increase accuracy are: increasing the number of facets, using vertex averaging and the use of true geometry to successfully model IR glint effects. Conclusions are drawn as to the way forward for high fidelity modelling.

Citation Download Citation

A. A. Mitchell, J. M. Brewster, A. W. Haynes, and P. A. Richardson "Modelling reflections from exact surfaces in CameoSim", Proc. SPIE 6543, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XVIII, 654304 (30 April 2007); https://doi.org/10.1117/12.724823

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