Lens having total reflective side surfaces and light source module with same

摘要

The present disclose relates to a lens. The lens includes a bottom surface; a light input surface depressed from a center of the bottom surface; a light output surface opposite to the light input surface, the light output surface comprising a concave surface located at a center thereof and a convex surface surrounding the concave surface; and total reflective side surfaces. The side surface includes a first and a second side surfaces gradually slanting outwardly along a direction from the bottom surface to the light output surface, and a third side surface and a fourth side surface being perpendicular to the bottom surface. The present disclose also relates to a light source module with the lens.

主权项

1. A lens comprising:
a bottom surface; a light input surface depressed from a center of the bottom surface; a light output surface opposite to the light input surface, the light output surface comprising a concave surface located at a center thereof and a convex surface surrounding the concave surface; and total reflective side surfaces, comprising a first and a second side surfaces extending from two opposite sides of the bottom surface to the light output surface, and a third and a fourth side surfaces extending from the other two opposite sides of the bottom surface to the light output surface, the first and second side surfaces gradually slanting outwardly along a direction from the bottom surface to the light output surface, the third side surface and the fourth side surface being perpendicular to the bottom surface, and the total reflective side surfaces being directly connected between the bottom surface and the light output surface.