Photographing optical lens assembly, image capturing unit and mobile device

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

• a first lens element having positive refractive power;
• a second lens element having negative refractive power;
• a third lens element;
• a fourth lens element;
• a fifth lens element, wherein both of an object-side surface and an image-side surface of the fifth lens element are 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 inflection point, and both of an object-side surface and the image-side surface of the sixth lens element are aspheric;
• wherein the photographing optical lens assembly has a total of six lens elements, an axial distance between the first lens element and the second lens element is smaller than an axial distance between the fifth lens element and the sixth lens element;
• wherein an entrance pupil diameter of the photographing optical lens assembly is EPD, a sum of axial distances between any two lens elements adjacent to each other is ΣAT, a curvature radius of the 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, and the following conditions are satisfied:
• 2.40<EPD/ΣAT;
• and
• (R9+R10)/(R9−R10)<−0.15.

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;
• a fourth lens element;
• a fifth lens element, wherein both of an object-side surface and an image-side surface of the fifth lens element are 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 inflection point, and both of an object-side surface and the image-side surface of the sixth lens element are aspheric;
• wherein the photographing optical lens assembly has a total of six lens elements, an entrance pupil diameter of the photographing optical lens assembly is EPD, a sum of axial distances between any two adjacent lens elements is ΣAT, 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, an f-number of the photographing optical lens assembly is Fno, and the following conditions are satisfied:
• 2.20<EPD/ΣAT;
• 0.73<EPD/ImgH<1.10;
• Fno<1.55;
• and
• TL/ImgH<2.50.

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

• a first lens element;
• a second lens element;
• a third lens element;
• a fourth lens element having negative refractive power;
• a fifth lens element, wherein both of an object-side surface and an image-side surface of the fifth lens element are aspheric;
• 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 inflection point, and both of the object-side surface and the image-side surface of the sixth lens element are aspheric;
• wherein the photographing optical lens assembly has a total of six lens elements, an entrance pupil diameter of the photographing optical lens assembly is EPD, 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, an f-number of the photographing optical lens assembly is Fno, and the following conditions are satisfied:
• 0.65<EPD/ImgH<1.50;
• TL/ImgH<2.50;
• and
• Fno≦1.75.