Epi DIC of an integrated circuit

Here is a video I made of an uncovered integrated circuit, viewed using epi-illuminated DIC (reflected-light differential interference contrast), and cycling through the various appearances of the IC circuitry as the upper prism is moved through the optics of the microscope. Note the changing look of the circuitry, how the contrast and clarity changes, a key reason why this technique was used to troubleshoot ICs during development.

First is a view using a Reichert Univar microscope with a low-power objective (Reichert Plan Fluor LWD Epi IK 10x/0.20 ∞/0), then a repeat with a higher magnification (Reichert Plan Fluor Epi IK 50x/0.85 ∞/0.