Clear Aperture Checker calculator
Verify a Gaussian beam fits within an optic's clear aperture.
Category: Optomechanics
Formula: Clip ≈ exp(−2·(CA/2)²/w²)
Inputs
| Input | Parameter | Unit | Default |
|---|---|---|---|
| Beam radius w | w | mm | 2 |
| Clear aperture Ø | CA | mm | 22.86 |
Result with the default inputs
- 3σ diameter: 6 mm
- Power outside CA: 4.2739e-27 %
- OK? (CA ≥ 3σ Ø): Yes ✓
Open it with your own values: put each input in the address as a parameter, for example /calculators/clear-aperture-checker?w=2. A unit other than the listed one goes in <parameter>_unit.
Read more: Wikipedia: Aperture