a light source part configured to generate and irradiate light;

a lens array provided on a front side of the light source part, the lens array comprising:

a first lens part comprising a plurality of first micro lenses to which the light is input from the light source part; and

a second lens part comprising a plurality of second micro lenses configured to output the light input from the first lens part,

wherein upward/downward sizes of at least some of the plurality of first micro lenses are smaller than upward/downward sizes of the second micro lenses, the upward/downward sizes of the first micro lenses and the second micro lenses measured perpendicularly with respect to an optical axis of the light source part,

wherein a central area of the lens array through which the optical axis of the light source part passes, is defined as a first area, and an area disposed at a circumference of the first area, is defined as a second area, and

wherein upward/downward sizes of the first micro lenses through which the optical axis of the light source part passes are larger than upward/downward sizes of the first micro lenses provided in the second area to convert the light from the light source to a uniform light pattern projected from the lens array.