Optical structure

The utility model discloses an optical structure. The optical structure comprises a bottom surface, first incident surfaces/first refraction surfaces and a second incident surface/second refraction surface which are arranged on the bottom surface, a first emergent surface/third refraction surface and second emergent surfaces/fourth refraction surfaces which are arranged above the bottom surface, and total reflection surfaces connecting the bottom surface and the first emergent surface/third refraction surface and the second emergent surfaces/fourth refraction surfaces. The optical structure is used for adjusting angles and density of light beams. According to the utility model, a conventional optical structure is improved, and high luminous efficiency and small half light intensity angles can be achieved.