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Both calculators run independently — change the inputs on either side to compare results.

Thin Lens Focal Length Calculator

Compute the focal length of a thin lens from object and image distances, or find where an image forms for a known lens. Essential for optics lab work, camera design, and eyeglass prescription analysis.

Object Distance (cm)

Image Distance (cm)

Fill in the required fields to see your result.

Optics

Fiber Optic Parameters Calculator

Compute the numerical aperture, acceptance cone half-angle, or critical angle of an optical fiber from its core and cladding refractive indices. Used by fiber installers, photonics students, and optical engineers.

Core Refractive Index

Cladding Refractive Index

External Medium Index

Calculate

Fill in the required fields to see your result.

Key differences

	Thin Lens Focal Length Calculator	Fiber Optic Parameters Calculator
Category	Optics	Optics
Inputs required	2	4
Result	Focal Length (cm)	Result
What it does	Compute the focal length of a thin lens from object and image distances, or find where an image forms for a known lens. Essential for optics lab work, camera design, and eyeglass prescription analysis.	Compute the numerical aperture, acceptance cone half-angle, or critical angle of an optical fiber from its core and cladding refractive indices. Used by fiber installers, photonics students, and optical engineers.