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Fiber Optic Numerical Aperture Calculator

Compute the numerical aperture (NA) and acceptance angle of an optical fiber from its core and cladding refractive indices. Essential for fiber optic system design, light-coupling efficiency analysis, and telecom engineering.

Core Refractive Index

Cladding Refractive Index

External Medium Index

Fill in the required fields to see your result.

Optics

Telescope Magnification Calculator

Calculate the magnification, resolution, and light-gathering power of any telescope from its objective focal length, eyepiece, and aperture. Ideal for astronomers choosing eyepieces for a target.

Objective Focal Length (mm)

Eyepiece Focal Length (mm)

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Key differences

	Fiber Optic Numerical Aperture Calculator	Telescope Magnification Calculator
Category	Optics	Optics
Inputs required	3	2
Result	Numerical Aperture	Magnification (×)
What it does	Compute the numerical aperture (NA) and acceptance angle of an optical fiber from its core and cladding refractive indices. Essential for fiber optic system design, light-coupling efficiency analysis, and telecom engineering.	Calculate the magnification, resolution, and light-gathering power of any telescope from its objective focal length, eyepiece, and aperture. Ideal for astronomers choosing eyepieces for a target.