====== Poisson Spot ======
{{:physicsdemos:waves_and_optics:diffraction:poisson_spot_1.jpeg?400|}}
{{:physicsdemos:waves_and_optics:diffraction:poisson_spot_2.jpeg?400|}}

An opaque disk placed in the path of a spatially-filtered laser beam casts a bright spot in the center of its shadow. A diffraction pattern consisting of a series of concentric rings is also visible since the incident light is monochromatic.

L0, L1

PIRA DCS 6C20.10