📊 Beam Spot Size Formula
w(z) = w₀√(1 + (z/zᵣ)²)
Where w(z) is spot size at distance z, w₀ is waist radius, zᵣ is Rayleigh range
Beam Spot Size:
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Spot Diameter:
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Rayleigh Range:
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Method Used:
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💡 Tips & Information
- Beam waist is the minimum beam radius
- Rayleigh range: zᵣ = πw₀²/λ
- Spot size increases with distance from waist
- Smaller wavelength = smaller spot size
- Numerical aperture affects focusing ability