Near-field diffraction calculator

fresnel.li

Choose an aperture, enter the wavelength and propagation distance, then compute the near-field diffraction pattern by computing the Rayleigh–Sommerfeld integral. Change the propagation distance to see how the field evolves.

Aperture

Wavelength / nm Distance z / cm

Advanced options

Pixel size / µm Intensity scale Intensity colormap Phase colormap

Output grid: 1024 × 1024 pixels.