The method suits for the diffraction of optical plane waves with arbitrary incident direction and polarization direction.

With the coplanar reference target, the spacial pose between camera and optical plane can be calibrated by using the cameras projective center and the lights information in the cameras image surface.

Cool-headed meteorologists were quick to put the story to bed: it was just an optical illusion, the cause of sunlight hitting a cloud disturbed by wind or plane traffic in just the right way.