CPC G02B 13/0045 (2013.01) [G02B 9/62 (2013.01); G02B 13/0015 (2013.01); G02B 13/18 (2013.01)] | 23 Claims |
1. A photographing optical lens assembly comprising six lens elements, the six lens elements being, 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, a fifth lens element and a sixth lens element; each of the six lens elements has an object-side surface towards the object side and an image-side surface towards the image side;
wherein the first lens element has positive refractive power; the second lens element has negative refractive power; at least one of the six lens elements comprises at least one inflection point;
wherein an axial distance between the second lens element and the third lens element is larger than a central thickness of the sixth lens element; a central thickness of the first lens element is larger than a central thickness of the fourth lens element;
wherein an axial distance between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, a focal length of the photographing optical lens assembly is f, a refractive index of the first lens element is N1, a refractive index of the second lens element is N2, a refractive index of the third lens element is N3, a refractive index of the fourth lens element is N4, a refractive index of the fifth lens element is N5, a refractive index of the sixth lens element is N6, a maximum of N1, N2, N3, N4, N5 and N6 is Nmax, a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of the image-side surface of the sixth lens element is R12, a half of a maximal field of view of the photographing optical lens assembly is HFOV, and the following conditions are satisfied:
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