We propose a procedure for digitizing a translucent object with sufficient information for predictive rendering of its appearance.

In a broad range of manufacturing disciplines, every product has a digital twin useful for product design and quality assurance. The digital twin facilitates digital prototyping, a process that enables the designer to virtually explore use of materials before manufacturing starts. This saves time and reduces waste. However, if we are to trust and make decisions based on a digital twin, we need an ability to predictively render the appearance of the digital object.


Duc Minh Tran
[PhD student]
Technical University of Denmark
Jeppe Revall Frisvad
[Associate Professor]
Technical University of Denmark
Morten Hannemose
[Assistant Professor]
Technical University of Denmark
Digitzation and validation pipeline
Figure 1: Digitization and validation pipeline for creating digital twins of translucent materials
Sample wt-% Scattering Particle Particle Density Mean Diameter Refractive Index
IOL1068-5 0.70 Titanium dioxide (TiO2) 4.23 g/mL 300nm Seifke et al. (2016)
IOL1068-6 3.00
IOL1068-7 5.00
IOL1068-8 0.30 Polydimethylsiloxane (PDMS) 0.965 g/mL 2.2 µm Zhang et al. (2020)
IOL1068-9 0.65
IOL1068-10 1.00
IOL1068-11 1.50 Polyvinylpyrrolidone (PVP) 1.2 g/mL [8µm;10µm] König et al. (2014)
IOL1068-12 3.50
IOL1068-13 5.00
IOL1068-14 0.50 Polymethyl methacrylate (PMMA) 1.18 g/mL [0.8µm;1µm] Zhang et al. (2020)
IOL1068-15 1.25
IOL1068-16 2.00
Different samples of our object of interest and their assumed particle inclusions leading to different levels of translucency. The host medium is polycarbonate (PC) with refractive index (nhost) available from Zhang et al (2020).

Optical Properties


Complex Refractive Indices Measurements of Polymers in Visible and Near-infrared Bands [2020]

X. Zhang, J. Qiu, X. . Li, J. Zhao, L. H. Liu
Applied Optics , 59, 2337—2344

Materials Pushing the Application Limits of Wire Grid Polarizers further into the Deep Ultraviolet Spectral Range [2016]

T. Siefke, S. Kroker, K. Pfeiffer, O. Puffky, K. Dietrich, D. Franta, I. Ohlídal, A. Szeghalmi, E. Kley, A. Tünnermann
Advanced Optical Materials , Wiley, 4(11), 1780–1786

Electrically Tunable Plasmonic Behavior of Nanocube-Polymer Nanomaterials Induced by a Redox-Active Electrochromic Polymer [2014]

T. König, P. Ledin, J. Kerszulis, M. Mahmoud, M. El-Sayed, J. Reynolds, V. Tsukruk
ACS Nano , 8(6), 6182–-6192