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Laser Beam Divergence Calculator — result sheet
Estimate full-angle far-field beam divergence from wavelength and initial beam diameter under a diffraction-limited circular-aperture model.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Full-angle divergence≈2.44×wavelength/beam diameter, with wavelength and diameter in the same unit.
The result is a diffraction-limited estimate and does not characterize a specific laser’s real beam quality or hazard.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Wavelength — minimum 1.0E-6; maximum 1000000000
- Initial beam diameter — minimum 1.0E-6; maximum 1000000
Worked example
| Input | Value |
|---|---|
| Wavelength | 632.8 |
| Initial beam diameter | 1 |
Full-angle divergence ≈0.001545 rad.
Assumptions and limits
- Wavelength and diameter are converted to compatible units.
- A circular, idealized, diffraction-limited beam is assumed.
- Beam quality factor, lens aberration, aperture shape, alignment, and laser safety are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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