Thin films of soap, around
a centimeter across and about a micron thick, are imaged as the horizontally or vertically
held films evaporate and become thinner. Striking colors arise
by light-wave interference, and indicate the local thickness of
the film. Plumes and jets occur near the walls. The
real-time micro-scale fluid dynamics are revealed in videos.
(Last update Aug. 2014)
|
Oil floating on a
water surface thins by evaporation (fast if it is volatile) or
by mechanical action. Colors again arise as light-waves
reflect off the top oil-air and mid oil-water surfaces and then interfere. Off-worldly structures form in a
sort of abstract art. Motion videos are equally
interesting with evaporation and droplet building pools, and
drop coalescence. (Aug. 2014) |
Crystals, grown
under a cover glass by cooling a melted mixture of organic
chemicals with similar melting points, contain complex and
beautiful structures. Chemicals used include urea, vitamin
C, resorcinol, carbon tetra bromide, sulfur, dibenzofuran,
salicylic acid, malic acid, vanillin, napthol, and many others. |
Further
explorations of abstract "crystal art" using different optical
contrast methods, such as oblique and darkfield illumination,
phase and differential interference contrast (DIC).
Some Panographic presentations with many 'best resolution' 20-60X
images stitched together to make an equivalent 2X or 4X
high-quality print at GIGAPIXEL RESOLUTION
have been completed in 2022. |