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Optics and light calculators 🔍 calculators
Explore 8 free optics and light calculators 🔍 calculators. Calculate in your browser with clear inputs, worked examples, and transparent methods.
8 calculators available
- Circular Aperture Rayleigh Resolution
Estimate the small-angle diffraction limit from wavelength and an ideal circular aperture diameter.
- Dielectric Brewster Angle & Index Ratio
Calculate Brewster angle or either positive refractive index for an ideal dielectric interface.
- F-Number, Entrance Pupil Diameter & Area
Relate focal length, f-number and the diameter and area of an ideal circular entrance pupil.
- Illuminance in Lux & Foot-Candles
Convert nonnegative illuminance between lumens per square meter and lumens per square foot.
- Polarizer Angle & Transmitted Light Intensity
Apply Malus’s law to polarized light intensity, analyzer angle and the principal inverse angle.
- Positive Lens Power & Focal Length
Convert positive focal length to positive optical power in diopters and solve the inverse.
- Spherical Body Geometric Horizon Distance
Calculate the straight-line tangent distance to an ideal spherical horizon from height and radius.
- Telescope Eyepiece Magnification & Sky Field
Estimate telescope magnification, true angular field and small-field circular area from focal lengths and eyepiece apparent field.