This evening, looking at the television in my apartment, I noticed that the light reflected on it manifested some kind of regular pattern. When the source of light is sufficiently far, this consists of six straight rays that appear to be symmetric under reflections about the vertical axis, as can be seen in the following picture:
My first thought on this was that light propagates within the screen along certain preferred directions. However, when the reflection angle between the source and the observer is such that the source is not directly reflected, the straight lines are still visible, and converge to a point outside of the surface of the television:
Finally and oddly enough, when the source gets very close to the reflection surface, some strong bending of the rays becomes visible, and the rays become shorter. This would suggest that the origin of this phenomenon may simply be due to some reflection, rather than diffraction taking place within the screen of the television.
I was wondering what the origin of this peculiar phenomenon might be. A possible interpretation I thought of is that some kind of crystal structure may reflect light in certain preferred directions, but this does not seem to explain the bending of the rays. Any ideas?