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How this tool works

A physical-optics workbench that connects equations to spatial and angular intensity patterns.

All plot axes display quantities and units.

Core equations

Δy = λL/da sin θ = mλI = I₀ cos²θθ = 1.22λ/D

Assumptions

  • Fraunhofer approximations are used for slit and grating calculations.
  • Thin-film calculations assume normal incidence and equal-amplitude qualitative interference.

Limitations

  • Vector diffraction, material dispersion, partial coherence propagation, and polarization phase retardance are simplified.