Optical imaging lens

An optical imaging lens, from an object side to an image side in order along an optical axis comprising:

• a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element, the first lens element to the sixth lens element each having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
• an optical axis region of the image-side surface of the first lens element is convex;
• a periphery region of the object-side surface of the third lens element is convex, and an optical axis region of the image-side surface of the third lens element is convex;
• the fourth lens has negative refracting power;
• an optical axis region of the image-side surface of the fifth lens element is concave;
• the sixth lens has positive refracting power;
• wherein only the above-mentioned six lens elements of the optical imaging lens have refracting power;
• wherein the optical imaging lens is a fixed focus lens;
• wherein the optical imaging lens satisfies the relationship:
• HFOV/Fno≥18.800 degrees and (ALT+EFL)/(AAG+BFL)≤3.500, wherein HFOV is half of the field of view of the optical imaging lens, Fno is the f-number of the optical imaging lens, ALT is a sum of thicknesses of all the six lens elements along the optical axis, EFL is an effective focal length of the optical imaging lens, AAG is a sum of five air gaps from the first lens element to the sixth lens element along the optical axis, BFL is a distance from the image-side surface of the sixth lens element to an image plane along the optical axis.

An optical imaging lens, from an object side to an image side in order along an optical axis comprising:

• a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element, the first lens element to the sixth lens element each having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
• an optical axis region of the image-side surface of the first lens element is convex;
• a periphery region of the object-side surface of the third lens element is convex;
• the fourth lens has negative refracting power;
• a periphery region of the object-side surface of the fifth lens element is concave, and an optical axis region of the image-side surface of the fifth lens element is concave;
• the sixth lens has positive refracting power;
• wherein only the above-mentioned six lens elements of the optical imaging lens have refracting power;
• wherein the optical imaging lens is a fixed focus lens;
• wherein the optical imaging lens satisfies the relationship:
• HFOV/Fno≥18.800 degrees and (ALT+EFL)/(AAG+BFL)≤3.500, wherein HFOV is half of the field of view of the optical imaging lens, Fno is the f-number of the optical imaging lens, ALT is a sum of thicknesses of all the six lens elements along the optical axis, EFL is an effective focal length of the optical imaging lens, AAG is a sum of five air gaps from the first lens element to the sixth lens element along the optical axis, BFL is a distance from the image-side surface of the sixth lens element to an image plane along the optical axis.