Gap of the prism from the mirror
Sag: s = R(1-Cos[ArcSin[d/2/R]])
- Mirror curvature sag for 2mm prism (R=37.75mm): s=13um
- Minimum gap: 20um => s=33um => R=15mm
- Nominal gap: 35um => s=48um => R=10mm
- Maximum gap: 50um => s=63um => R=8mm
The second figure shows somewhat realistic arrangement of the pieces |