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 refractive power having an object-side surface being convex in a paraxial region thereof;
• a second lens element having refractive power;
• a third lens element having positive refractive power;
• a fourth lens element having refractive power;
• a fifth lens element having positive refractive power, wherein both of an object-side surface and an image-side surface of the fifth lens element are aspheric;
• and
• a sixth 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, wherein both of the object-side surface and the image-side surface of the sixth lens element are aspheric, and the image-side surface of the sixth lens element has at least one inflection point;
• wherein the photographing optical lens assembly has a total of six lens elements with refractive power, a central thickness of the fifth lens element is CT5, a central thickness of the sixth lens element is CT6, an axial distance between the object-side surface of the first lens element and an image surface is TL, a maximum image height of the photographing optical lens assembly is ImgH, a curvature radius of an object-side surface of the third lens element is R5, a curvature radius of an image-side surface of the third lens element is R6, and the following conditions are satisfied:
• CT6/CT5<0.90;
• TL/ImgH<3.0;
• and
• −0.5<R6/R5.

A photographing optical lens assembly comprising, in order from an object side to an image side:

• a first lens element with refractive power having an object-side surface being convex in a paraxial region thereof;
• a second lens element having refractive power;
• a third lens element having positive refractive power;
• a fourth lens element having refractive power;
• a fifth lens element having positive refractive power, wherein both of an object-side surface and an image-side surface of the fifth lens element are aspheric;
• and
• a sixth 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, wherein both of the object-side surface and the image-side surface of the sixth lens element are aspheric, and the image-side surface of the sixth lens element has at least one inflection point;
• wherein the photographing optical lens assembly has a total of six lens elements with refractive power, a central thickness of the fifth lens element is CT5, a central thickness of the sixth lens element is CT6, an axial distance between the object-side surface of the first lens element and an image surface is TL, a maximum image height of the photographing optical lens assembly is ImgH, a curvature radius of an object-side surface of the third lens element is R5, a curvature radius of an image-side surface of the third lens element is R6, a focal length of the photographing optical lens assembly is f, a focal length of the fifth lens element is f5, a focal length of the sixth lens element is f6, and the following conditions are satisfied:
• CT6/CT5<1.5;
• TL/ImgH<3.0;
• −0.5<R6/R5;
• and
• 0<(f5*f6)/[f*(f5+f6)]<1.15.