DICHROMIC MIRROR HAVING MULTILAYER THIN FILMS INCLUDING VANADIUM DIOXIDE

摘要

An optical effect device in the form of a multi-layer mirror, with at least one layer consisting of vanadium dioxide, and the layers being limited in thickness to about 2,000 Angstroms such that interference effects can provide essentially any desired color. Methods are disclosed for determining what two colors are achievable with a given mirror as the VO2 is carried through its transition temperature, and methods are disclosed for optimizing the contrast in reflectance between the mirror in its hot and cold states.