Optical lens, lighting module, and light unit comprising same

A lighting module comprising:

• a plurality of circuit boards, each of which length in a direction of a first axis is longer than that in a direction of a second axis;
• a plurality of optical lenses arranged in the direction of the first axis on the plurality of circuit boards;
• and
• at least one light emitting device respectively disposed between the circuit board and the plurality of optical lenses,
• wherein the optical lens comprises:
• an incident surface around the at least light emitting device disposed on a top surface of the circuit board;
• a first light output surface upwardly emitting light incident through the incident surface;
• a second light output surface emitting the incident light in a lateral direction;
• and
• a side protruding part protruding outward from a first region of the second light output surface,
• wherein the side protruding part of each of the optical lenses protrudes outward of a side of the circuit board,
• the plurality of circuit boards comprise first and second circuit boards arranged in the direction of the second axis,
• wherein a minimum distance between the second light output surface of the optical lens disposed on the first circuit board and the second light output surface of the optical lens disposed on the second circuit board is greater than a distance between the optical lenses arranged on each of the first and second circuit boards, and
• wherein the side protruding part has a height smaller than a thickness of the second light output surface, and is disposed more adjacent to the first light output surface than the top surface of the circuit board.