I love the idea of these electro-optic (or in this case electo-thermal) configurable lenses. and fourier optics in general.

What range of optical wavelengths did this lens operate well over, or could a similarly constructed system operate. My experience with electron beam exposed PMMA grating/lenses was that they were OK over the optical range, but did show noticeable dispersion, while for filtered (or laser) optics they worked extremely well to replace much thicker/heavier system solutions.