How the James Webb Telescope Achieves Nanometer Precision
Breaking Taps · Explainer · 11 min · 2022 · YouTube title: How to achieve nanometer precision in space?
Why it's here
Commenters repeatedly recommend it in JWST threads as a great explanation of clever mechanical design that is accurate and long lasting.
What it covers
Breaking Taps explains how the cryogenic mirror actuators on the James Webb Space Telescope achieve nanometer precision using flexures. It shows a 3D-printed replica and how one motor handles both coarse and fine motion.