Calculate the minimum optical density (OD) required for laser safety eyewear.
Formula: OD = log10(Irradiance / MPE), where Irradiance = Power / Beam Area
Result
✨ Beam Divergence Calculator
Calculate far-field divergence angle for Gaussian laser beams.
Formula: θ = 4λ / (π×D) for Gaussian beams
Result
🔬 Fresnel Reflection Calculator
Calculate reflection and transmission at an interface between two optical media.
Normal incidence: R = ((n1-n2)/(n1+n2))²
Result
📏 Snell's Law Calculator
Calculate refraction angle using Snell's law: n1sinθ1 = n2sinθ2
Formula: n1×sin(θ1) = n2×sin(θ2)
Result
🎯 Diffraction Limit Calculator
Calculate the Airy disk diameter and spatial resolution limit of an optical system.
Airy disk diameter = 2.44 × λ × f/# × (1+M)
Result
⚠️ Disclaimer & Terms of Use:
These optical calculators are provided for free and for reference only. Results are estimates based on ideal theoretical formulas and do not constitute professional engineering advice. Actual optical performance may vary due to material properties, manufacturing tolerances, coating variations, and environmental factors. PhotonEdge makes no warranties regarding the accuracy of these calculations. Always verify critical parameters with our engineering team before ordering. Use of these calculators is at your own risk.
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PhotonEdge provides free online optical calculators for optical engineers and researchers. Our tools include focal length calculator, optical magnification calculator, laser safety OD calculator, beam divergence calculator, Fresnel reflection calculator, Snell's law calculator, and diffraction limit calculator. As a leading optical components manufacturer and custom optics provider, PhotonEdge helps engineers select precision lenses, mirrors, prisms, and optical coatings. Whether you need BK7 plano-convex lenses, fused silica windows, or custom optical solutions, our calculators help you make informed decisions. Precision lenses supplier PhotonEdge serves 500+ global clients with high-quality optical components.
