Secondary lens structure with wide light emitting angle

The invention relates to a secondary lens structure with a wide light emitting angle. The structure is characterized in that an upper diffuse reflection layer is arranged opposite to a light source, and an upper reflection layer is distributed at the periphery of the upper diffuse reflection layer, so that a part of light emitted by the light source is emitted through the upper diffuse reflection layer, and the effect of expanding the light emitting angle is achieved; and the other part of light emitted by the light source reaches the upper reflection layer, is reflected back through the first reflection, then reaches a lower reflection layer arranged on the first surface, is reflected through the second reflection and then is emitted out of a lens body, so that after the other part of light reaching the upper reflection layer is subjected to second reflection, the emitting angle is also increased, and therefore, the integral light emitting angle and the emitting uniformity of the light source are greatly imp