Photographing optical lens assembly, image capturing unit and electronic device

A photographing optical 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;
• a third lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof;
• a fourth lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof;
• a fifth lens element having an image-side surface being concave in a paraxial region thereof;
• and
• a sixth lens element having an object-side surface being convex in a paraxial region thereof and 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-axis region thereof, and the object-side surface and the image-side surface of the sixth lens element are both aspheric;
• wherein the photographing optical lens assembly has a total of six lens elements, and there is an air gap in a paraxial region located between every two lens elements of the photographing optical lens assembly that are adjacent to each other;
• a curvature radius of the image-side surface of the third lens element is R6, a curvature radius of the object-side surface of the fourth lens element is R7, a curvature radius of the image-side surface of the fifth lens element is R10, a curvature radius of the object-side surface of the sixth lens element is R11, a central thickness of the third lens element is CT3, 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, and the following conditions are satisfied:
• −7.0<R6/R7<0;
• 0<R10/R11<2.0;
• and
• CT3/(T23+T34)<0.75.

A photographing optical 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;
• a third lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof;
• a fourth lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof;
• a fifth lens element having an image-side surface being concave in a paraxial region thereof;
• and
• a sixth lens element having an object-side surface being convex in a paraxial region thereof and 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-axis region thereof, and the object-side surface and the image-side surface of the sixth lens element are both aspheric;
• wherein the photographing optical lens assembly has a total of six lens elements, and there is an air gap in a paraxial region located between every two lens elements of the photographing optical lens assembly that are adjacent to each other;
• wherein a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of an image-side surface of the first lens element is R2, a curvature radius of an object-side surface of the second lens element is R3, a curvature radius of an image-side surface of the second lens element is R4, a curvature radius of the object-side surface of the third lens element is R5, a curvature radius of the image-side surface of the third lens element is R6, a curvature radius of the object-side surface of the fourth lens element is R7, a curvature radius of the image-side surface of the fourth lens element is R8, a curvature radius of an object-side surface of the fifth lens element is R9, a curvature radius of the image-side surface of the fifth lens element is R10, a curvature radius of the object-side surface of the sixth lens element is R11, a curvature radius of the image-side surface of the sixth lens element is R12, and the following conditions are satisfied:
• −7.0<R6/R7<0;
• 0<R10/R11<2.0;
• and
• |R12|<|Ri|, wherein i=1,2,3,4,5,6,7,8,9,10,11.