Introduction To Fourier Optics Goodman Solutions Work -

The quadratic phase factor inside the integral ( e^i\frack2z(\xi^2+\eta^2) \approx 1 ) when ( z \gg \frack(a^2+b^2)2 ).

( I(x,y,z) = \left( \fracab\lambda z \right)^2 \textsinc^2\left( \fraca x\lambda z \right) \textsinc^2\left( \fracb y\lambda z \right) ) introduction to fourier optics goodman solutions work

Each integral yields ( a \cdot \textsinc(a x/\lambda z) ) and ( b \cdot \textsinc(b y/\lambda z) ). The quadratic phase factor inside the integral (