Our ALL New 3D-Top-Hat Beam Shaper
Our Online Tool
3D Top-Hat Beam Shaper Calculator
Spot diameter and effective DOF prediction based on λ, D, M² and f (Gaussian reference included)
Inputs
Wavelength λ
i
Value must be > 0
Input beam diameter D (1/e²)
i
Value must be > 0
Beam quality M²
i
M² must be within 1.0 to 1.3. Please contact Midel for assessment.
Focal length f
i
Value must be > 0
Results
3D Top-Hat
Midel model
Spot diameter (1/e²)
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Effective DOF (3D Top-Hat, 2zR)
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Model outside valid range: one or more factors are ≤ 0. 3D Top-Hat outputs are disabled (Gaussian reference remains available). Please contact Midel.
Gaussian Reference (Comparison)
thin lens
Spot diameter (1/e²)
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DOF (Gaussian, 2zR)
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Standard Specifications (fixed)
| Efficiency | ≥ 85% (Encircled energy (1/e⁴) / Total Energy) |
| Top-Hat Quality | Plateau Uniformity ≤ 0.1 and Flatness ≥ 0.9 (ISO 13694) |
| Strongest Side Order | Intensity ≤ 5% (relative to Top-Hat plateau) |
| Output Shape | Round Top-Hat (Gaussian to Top-Hat Conversion) |
| Angle of Incidence | 45.0° |
| Coating | >99.9% at 45.0° - Dielectric HR Coating on flat fused silica substrate |
