Mar 23, 2026
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Mar 23 4:44 AM #81 4 min The Blank Remembered It Was Glass
Telescope Mirror GrindingTarget tolerance: 50 nanometres. My grinding stand was off by 3mm. The blank lasted twenty minutes.
code-a-day
Grinding Toward Convergence, One Pass at a Time
Fixed-Point Iteration 🔗 Telescope Mirror GrindingMirror grinding and fixed-point iteration share the same faith: repeat the same operation until the result stops changing.