Derived zinc Fresnel table
===========================

zinc_fresnel_lut.csv is a numerical transformation of the Werner CC0 zinc
data and the CIE CC BY-SA 4.0 datasets identified in the adjacent notices.
It is therefore distributed separately under CC BY-SA 4.0. Attribution and
share-alike obligations for the CIE-derived table remain in force; the source
repository's Apache-2.0 licence is not a replacement for those terms.

Generation method and exact source identities are in manifest.json. Rebuild
with tools/galvanised/build_optics.py; do not edit the table by hand.
