A first attempt at a double slit experiment, showing 2D interference fringes from two point sources situated 2 cm from each other recorded on a 20x20 cm 2D PSD.
The detector is situated 1 m downstream from the source assembly.
Real 2D interference fringes from two point sources on a 2D PSD.
Closeup of center part of fringes.
Aliased 2D interference fringes.
Aliased 2D interference fringes sampled at a different frequency, i.e. with a different pixel size.
Aliasing occurs since <math>\lambda = 1 \mu m \ll \Delta x</math>, where <math>\Delta x \approx 2 mm</math> is the pixel size of the detector, effectively violating the Nyquist sampling theorem.
Ray tracing through a CRL
Visual ray tracing through a Compound Refractive Lens