Photons Producing Butterfly-Shape Interference Patterns in Non-Parallel Curved Double Slit

The double slit experiment is one of basic experiments in Physical optics, where two slit are parallel. Recently, Non-parallel double slit experiments have been performed, we observe the hybrid patterns, the partial interference pattern embedded in diffraction patterns. Furthermore, Curved double slit experiments have been performed, we observe Arc-shape interference patterns and Point-symmetry interference patterns. In this article, we study Non-Parallel Curved Double Slit, and observed Butterfly-shape interference patterns.