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:
• a periphery region of the image-side surface of the second lens element is concave;
• the fourth lens element has negative refracting power, an optical axis region of the object-side surface of the fourth lens element is concave, and a periphery region of the image-side surface of the fourth lens element is convex;
• an optical axis region of the object-side surface of the fifth lens element is concave, and a periphery region of the object-side surface of the fifth lens element is concave;
• an optical axis region of the object-side surface of the sixth lens element is convex;
• wherein lens elements of the optical imaging lens consist of only the six lens elements described above, and wherein the optical imaging lens satisfies the relationship:
• υ5+υ6≤90.000, L22t62/L12t22≤3.600, wherein υ5 is an Abbe number of the fifth lens element, υ6 is an Abbe number of the sixth lens element, L22t62 is a distance from the image-side surface of the second lens element to the image-side surface of the sixth lens element along the optical axis, L12t22 is a distance from the image-side surface of the first lens element to the image-side surface of the second lens element 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 object-side surface of the first lens element is concave;
• an optical axis region of the image-side surface of the second lens element is concave;
• an optical axis region of the object-side surface of the fourth lens element is concave, and a periphery region of the image-side surface of the fourth lens element is convex;
• an optical axis region of the object-side surface of the fifth lens element is concave;
• an optical axis region of the object-side surface of the sixth lens element is convex;
• wherein lens elements of the optical imaging lens consist of only the six lens elements described above, and wherein the optical imaging lens satisfies the relationship:
• υ5+υ6≤90.000, L22t62/L12t22≤3.600, wherein υ5 is an Abbe number of the fifth lens element, υ6 is an Abbe number of the sixth lens element, L22t62 is a distance from the image-side surface of the second lens element to the image-side surface of the sixth lens element along the optical axis, L12t22 is a distance from the image-side surface of the first lens element to the image-side surface of the second lens element along the optical axis.