optics Calculators

Focal Length Calculator

Calculate the focal length of a lens using object and image distances

Calculate optical magnification from object and image parameters

Calculate refraction angles using Snell's law of refraction

Calculate the critical angle for total internal reflection

Calculate numerical aperture of optical fibers or lenses

Calculate f-number (f-stop) from focal length and aperture diameter

Calculate diffraction angles for gratings using the grating equation

Calculate Brewster's angle for polarization by reflection

Calculate optical power in diopters from focal length

Calculate depth of field for photography and imaging