Photorealistic visualization of fluorescent materials with dual surface scattering

Dmitry Zhdanov; Igor Potemin; Andrey Zhdanov; Vadim Sokolov; Andrew Lemeshev

doi:10.1117/12.2537633

19 November 2019 Photorealistic visualization of fluorescent materials with dual surface scattering

Dmitry Zhdanov, Igor Potemin, Andrey Zhdanov, Vadim Sokolov, Andrew Lemeshev

Proceedings Volume 11185, Optical Design and Testing IX; 1118516 (2019) https://doi.org/10.1117/12.2537633
Event: SPIE/COS Photonics Asia, 2019, Hangzhou, China

Abstract

The article is devoted to simulation of photorealistic images of materials with fluorescent properties. Usually measurements and simulations of scattering surfaces of objects with fluorescent properties is complex and expensive task. The source of problem is dependence of spectral characteristics of output scattered light from spectral characteristics of input light. There are two methods to simulate complex light scattering of similar materials. The first method is based on measurements of bi-directional scattering functions (BSDF) describing surface scattering. The second approach is based on total reconstruction of parameters of VS medium. Simulation of real ray propagation inside of fluorescent volume scattering medium is complex and time consumed task because of huge number of ray interactions with fluorescent scattering agents especially if their concentration is significant. We propose alternative method to simulate fluorescent materials. The approach does not require complex and expensive measurements of “fluorescent“ BSDF. A hybrid method to measure and simulate fluorescence objects is proposed. The specular part of scattering can be simulated with BSDF based on measurements of usual material without fluorescence effect. Note only directions close to specular direction are used from this BSDF. Diffuse part of scattering is simulated with standard spectrograms well-known in many description of fluorescence: fluorescence efficiency and fluorescent emission. This separation of fluorescent and “usual” part of scattering allows effective use of different techniques for visualization from rather simple Backward Ray Tracing to more complex approaches of ray visualization which use combined forward and backward techniques of ray tracing.

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Dmitry Zhdanov, Igor Potemin, Andrey Zhdanov, Vadim Sokolov, and Andrew Lemeshev "Photorealistic visualization of fluorescent materials with dual surface scattering", Proc. SPIE 11185, Optical Design and Testing IX, 1118516 (19 November 2019); https://doi.org/10.1117/12.2537633

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KEYWORDS

Luminescence

Scattering

Light scattering

Measurement devices

Visualization

Ray tracing

Fabry–Perot interferometers

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