Optical imaging lens assembly, image capturing unit and electronic device

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

• a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof;
• a second lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof;
• a third lens element;
• a fourth lens element, wherein at least one of an object-side surface and an image-side surface of the fourth lens element has at least one inflection point, and the object-side surface and the image-side surface of the fourth lens element are both aspheric;
• a fifth lens element, wherein an image-side surface of the fifth lens element has at least one inflection point, and an object-side surface and the image-side surface of the fifth lens element are both aspheric;
• and
• a sixth lens element having an image-side surface being concave in a paraxial region thereof, wherein the image-side surface of the sixth lens element has at least one convex shape in an off-axial region thereof, and an object-side surface and the image-side surface of the sixth lens element are both aspheric;
• wherein the optical imaging lens assembly has a total of six lens elements, there is an air gap in a paraxial region between every two lens elements of the optical imaging lens assembly that are adjacent to each other;
• a focal length of the optical imaging lens assembly is f, a central thickness of the fourth lens element is CT4, a curvature radius of an object-side surface of the second lens element is R3, a curvature radius of the image-side surface of the second lens element is R4, a curvature radius of the image-side surface of the fourth lens element is R8, a curvature radius of the image-side surface of the fifth lens element is R10, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, and the following conditions are satisfied:
• 0≦f/R8;
• 0≦f/R10;
• 0<(CT4/T34)+(CT4/T45)<5.0;
• 0.90<T45/T23;
• and
• 0<(R3+R4)/(R3−R4).