Numerical Aperture (NA) Calculator

Calculate the numerical aperture of optical systems including lenses, objectives, and optical fibers. Determine light-gathering ability and maximum acceptance angle.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)
σy — Normal Stress Y (MPa)
τxy — Shear Stress (MPa)
⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.
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How to Use

Enter the values for the scenario you are assessing. Calculate the numerical aperture of optical systems including lenses, objectives, and optical fibers. Determine light-gathering ability and maximum acceptance angle. Use the numerical aperture result to inform your calculation.

Frequently Asked Questions