Light micrograph of the surface of a sheet of gold leaf,photographed using differential interference contrast (DIC). DIC is a technique used for visualising small changes in a metallic surface. The light from a lamp passes through a polariser,then through a prism which splits the beam,rotating one half by 90 degrees. After reflection at the sample surface,the beams are recombined by a second prism and interfere before passing through a second polariser. This produces the colours seen here. Magnification x30 at 6x4.5cm size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Michler, Astrid & Hans-Frieder |
Taille de l’image : | 3543 px × 2630 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |