Optical lens and light source module having the same

A light source module, comprising:

• a light source;
• an optical lens covering the light source, and the optical lens comprising:
• a light incident face facing the light source;
• a light emitting face opposite to the light incident face;
• and
• a connecting face connecting the light incident face and the light emitting face;
• wherein the connecting face is planar, and the light emitting face comprises a lateral face extending upwardly from an outer periphery of the connecting face and a top face located above the light incident face;
• wherein the top face of the light emitting face comprises a center curved facet and a periphery curved facet surrounding and extending outwardly from the center curved facet;
• wherein the light incident face is a discontinuous face and includes a plurality of curved facets;
• and
• wherein a width of each curved facet gradually decreases along a bottom-to-top direction of the optical lens.