Optical lens assembly

An optical lens assembly, comprising a first lens element, a second lens element and a third lens element in order from a light exit side to a light incident side along an optical axis, wherein each of the first lens element to the third lens element comprises a light exit surface facing the light exit side and a light incident surface facing the light incident side, wherein a periphery region of the light incident surface of the first lens element is concave;

• the second lens element has positive refracting power, a periphery region of the light exit surface of the second lens element is convex, and an optical axis region of the light incident surface of the second lens element is concave;
• a periphery region of the light exit surface of the third lens element is concave;
• and
• lens elements of the optical lens assembly are only the first lens element to the third lens element described above, and a thickness of the first lens element along the optical axis is greater than or equal to a sum of two air gaps from the first lens element to the third lens element along the optical axis.

An optical lens assembly, comprising a first lens element, a second lens element and a third lens element in order from a light exit side to a light incident side along an optical axis, wherein each of the first lens element to the third lens element comprises a light exit surface facing the light exit side and a light incident surface facing the light incident side, wherein the first lens element has positive refracting power, and a periphery region of the light incident surface of the first lens element is concave;

• a periphery region of the light exit surface of the second lens element is convex;
• an optical axis region of the light exit surface of the third lens element is convex, and an optical axis region of the light incident surface of the third lens element is convex;
• and
• lens elements of the optical lens assembly are only the first lens element to the third lens element described above, and the optical lens assembly satisfies the following condition:
• EFL/BFL≤3.500, wherein EFL is an effective focal length of the optical lens assembly, and BFL is a distance from the light incident surface of the third lens element to a light-emitting surface along the optical axis.