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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

Numerical Aperture Calculator

Calculate the numerical aperture (NA) of an optical fiber from the refractive indices of its core and cladding. NA determines light-gathering ability and the maximum acceptance angle of the fiber.

Core Refractive Index

Cladding Refractive Index

Fill in the required fields to see your result.

Key differences

	Fiber Optic Numerical Aperture Calculator	Numerical Aperture Calculator
Category	Optics	Optics
Inputs required	3	2
Result	Numerical Aperture	Numerical Aperture
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 numerical aperture (NA) of an optical fiber from the refractive indices of its core and cladding. NA determines light-gathering ability and the maximum acceptance angle of the fiber.