Anomalous Dispersion in Predictive Rendering

In coloured media, the index of refraction does not decrease monotonically with increasing wavelength, but behaves in a quite non‐monotonical way. This behaviour is called anomalous dispersion and results from the fact that the absorption of a material influences its index of refraction. So far, thi...

Full description

Saved in:
Bibliographic Details
Published in:Computer graphics forum 2009-06, Vol.28 (4), p.1065-1072
Main Authors: Weidlich, Andrea, Wilkie, Alexander
Format: Article
Language:English
Subjects:
Color
Computer graphics
Computer Graphics [I.3.3]: Three-Dimensional Graphics and Realism
Computer science
Mathematics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In coloured media, the index of refraction does not decrease monotonically with increasing wavelength, but behaves in a quite non‐monotonical way. This behaviour is called anomalous dispersion and results from the fact that the absorption of a material influences its index of refraction. So far, this interesting fact has not been widely acknowledged by the graphics community. In this paper, we demonstrate how to calculate the correct refractive index for a material based on its absorption spectrum with the Kramers‐Kronig relation, and we discuss for which types of objects this effect is relevant in practice.
ISSN:0167-7055
1467-8659
DOI:10.1111/j.1467-8659.2009.01483.x