Optics Calculators
Last updated: October 2026
Prism Deviation Calculator
Determine how much a glass prism bends a light ray using its apex angle, refractive index, and incident angle.
Critical Angle Calculator
Calculate the critical angle beyond which light undergoes total internal reflection at the boundary between a denser and a rarer medium.
Optical Power Calculator
Convert a lens's focal length in centimetres to optical power in diopters instantly.
F-Number Calculator
Compute the f-number (f-stop) of a lens by dividing its focal length by the aperture diameter.
Laser Beam Parameters Calculator
Calculate Gaussian laser beam parameters: Rayleigh range, far-field divergence and beam radius at a distance from the waist, with an M² beam-quality factor for real beams.
Prism Dispersion Calculator
Calculate the deviation angle of light passing through a prism given its apex angle, incident angle, and refractive index.
Diffraction Limit Calculator
Calculate the smallest resolvable spot or feature that an optical system can distinguish, based on wavelength and aperture.
Laser Beam Divergence Calculator
Calculate how a laser beam's spot radius grows with propagation distance, accounting for beam quality factor M².
Optical Magnification Calculator
Find the total magnification of a microscope or telescope from objective and eyepiece focal lengths.
Fresnel Reflection Calculator
Calculate the percentage of light reflected at an optical interface for s- or p-polarization using the Fresnel equations.
Fiber Optic Numerical Aperture Calculator
Compute the numerical aperture (NA) and acceptance angle of an optical fiber from its core and cladding refractive indices.
Telescope Resolution Calculator
Determine the angular resolution, light-gathering power, or limiting magnitude of a telescope based on aperture and wavelength.
Interferometer Fringe Calculator
Calculate fringe spacing and visibility in optical interferometers based on wavelength, beam separation, and source coherence length.
Hologram Diffraction Calculator
Find the diffraction angle of light leaving a holographic grating for any order, wavelength, and incident angle.
Optical Resolution Calculator
Determines the minimum resolvable distance between two point sources through a microscope or lens using the Rayleigh criterion.