[PemiaGefe]

there's a crop glyph of oliver's castle of 4-15-07 that resembles an interferogram, or interference (or fringe) pattern as produced by an interferometer. the pattern is caused by two coherent wavefronts combining, usually a reference wavefront and a test wavefront where the resulting interference pattern indicates a wavefront error in the test wavefront. this is a very common way of using light for measurement purposes.

http://www.cropcircleconnector.com/2...astle2007.html



there is a scientific paper available that describes the effect and gives examples of interferograms that seem to resemble this crop glyph. the crop glyph seems to indicate a tilted wavefront. (the amount of the tilt would depend upon the wavelength of light used and the diameter of the pupil.)

http://www.opt-sci.arizona.edu/jcwya...components.pdf