optics Calculators
Last updated: May 2026
Focal Length Calculator
Find the focal length of a lens given the distance to the object and the distance to the formed image.
Magnification Calculator
Compute the optical magnification of a lens or mirror by comparing the image height to the object height.
Snell's Law Calculator
Determine the refraction angle when light passes between two media of different refractive indices using Snell's Law.
Critical Angle Calculator
Calculate the critical angle beyond which light undergoes total internal reflection at the boundary between a denser and a rarer medium.
Numerical Aperture Calculator
Calculate the numerical aperture (NA) of an optical fiber from the refractive indices of its core and cladding.
F-Number Calculator
Compute the f-number (f-stop) of a lens by dividing its focal length by the aperture diameter.
Diffraction Grating Calculator
Find the diffraction angle for any order of light passing through a grating using the grating equation.
Brewster's Angle Calculator
Calculate Brewster's angle — the incidence angle at which reflected light is perfectly polarized — given two media's refractive indices.
Optical Power Calculator
Convert a lens's focal length in centimetres to optical power in diopters instantly.
Depth of Field Calculator
Compute the total depth of field for any camera and lens combination using focal length, f-number, focus distance, and circle of confusion.
Lens Focal Length Calculator
Compute the focal length of any thick or thin lens from its refractive index, surface curvatures, and center thickness using the lensmaker's equation.
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 Parameters Calculator
Compute the numerical aperture, acceptance cone half-angle, or critical 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.
Prism Deviation Calculator
Determine how much a glass prism bends a light ray using its apex angle, refractive index, and incident angle.
Laser Beam Parameters Calculator
Compute key Gaussian laser beam properties — Rayleigh range, half-angle divergence, or beam radius at any distance from the waist.
Optical Magnification Calculator
Find the total magnification of a microscope or telescope from objective and eyepiece focal lengths.
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
Compute laser beam spot radius at any propagation distance, accounting for beam quality factor M².
Depth of Field Calculator
Determine the depth of field, hyperfocal distance, and near/far focus limits for any lens and camera combination.
Snell's Law Refraction Calculator
Calculate the refraction angle when light passes between two media using Snell's Law.
Interference Fringe Calculator
Compute the fringe spacing in a Young's double-slit or similar two-beam interference experiment.
Polarization Calculator
Calculate the intensity of light transmitted through a polarizer and analyzer using Malus's Law.
Telescope Magnification Calculator
Calculate the magnification, resolution, and light-gathering power of any telescope from its objective focal length, eyepiece, and aperture.
Depth of Field Calculator
Calculate the depth of field, hyperfocal distance, and sharp focus range for any camera setup.
Fiber Optic Numerical Aperture Calculator
Compute the numerical aperture (NA) and acceptance angle of an optical fiber from its core and cladding refractive indices.
Laser Beam Divergence Calculator
Calculate how a laser beam's spot radius grows with propagation distance, accounting for beam quality factor M².
Prism Dispersion Calculator
Calculate the deviation angle of light passing through a prism given its apex angle, incident angle, and refractive index.
Interferometer Fringe Calculator
Calculate fringe spacing and visibility in optical interferometers based on wavelength, beam separation, and source coherence length.
Optical Power Budget Calculator
Determine whether a fiber optic link has enough signal margin by calculating the power budget.
Hologram Diffraction Calculator
Find the diffraction angle of light leaving a holographic grating for any order, wavelength, and incident angle.
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.
Camera Depth of Field Calculator
Calculate how much of a scene will appear sharp in a photograph based on your lens, aperture, and focus distance.
Interferometry Fringe Calculator
Calculate the fringe spacing produced when two coherent beams intersect at a given angle and wavelength.
Polarization & Malus Law Calculator
Calculates transmitted light intensity after passing through one or more polarizers using Malus's Law.
Optical Resolution Calculator
Determines the minimum resolvable distance between two point sources through a microscope or lens using the Rayleigh criterion.
Fiber Optic Loss Calculator
Computes total optical power loss in a fiber optic link by summing cable attenuation, connector insertion loss, and splice loss.