Light-emitting module and lens

A light-emitting module comprising:

• a lens having:
• a light incident surface that is concave upward, and
• a light-exiting surface located on a side opposite the light incident surface;
• and
• a light source comprising a plurality of light-emitting units disposed below the lens;
• wherein:
• in a cross section passing through a center line of the light incident surface, the light incident surface comprises:
• an inflection point at which the light incident surface changes from a concave surface to a convex surface,
• a first light incident surface located above the inflection point and comprising a concave surface that is continuous with the inflection point and is concave upward, the first light incident surface being located in a central portion of the light incident surface in a top view, and
• a second light incident surface located below the inflection point and comprising a convex surface that is continuous with the inflection point and is convex downward, the second light incident surface being located outward of the first light incident surface in the top view;
• the light-exiting surface comprises:
• a flat surface located on a side opposite the first light incident surface, and
• a convex light-exiting surface that is located outward of the flat surface in the top view and is convex upward;
• and
• the plurality of light-emitting units include:
• one or more first light-emitting units disposed in a central portion in the top view, and
• a plurality of second light-emitting units located outward of the one or more first light-emitting units in the top view;
• the light-emitting module is configured to emit light that has passed through the lens and that has a first light distribution angle when only the one or more first light-emitting units are caused to emit light;
• and
• the light-emitting module is configured to emit light that has passed through the lens and that has a second light distribution angle less than the first light distribution angle when only the plurality of second light-emitting units are caused to emit light.