Photographing optical system, image capturing device and electronic device

摘要

A photographing optical system includes, 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 and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element with positive refractive power has a convex object-side surface and a concave image-side surface. The third lens element with negative refractive power has a concave image-side surface. The fourth lens element has positive refractive power. The fifth lens element with negative refractive power has a concave image-side surface, wherein the image-side surface of the fifth lens element comprises at least one convex shape thereon, and two surfaces of the fifth lens element are aspheric.

主权项

1. A photographing optical system comprising, in order from an object side to an image side:
a first lens element with positive refractive power having a convex object-side surface; a second lens element with positive refractive power having a convex object-side surface and a concave image-side surface; a third lens element with negative refractive power having a concave image-side surface; a fourth lens element having positive refractive power; and a fifth lens element with negative refractive power having a concave image-side surface, wherein the image-side surface of the fifth lens element comprises at least one convex shape in an off-axial region thereon, and an object-side surface and the image-side surface of the fifth lens element are aspheric; wherein the photographing optical system has a total of five lens elements, there is an air space between every two lens elements of the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element that are adjacent to each other, a central thickness of the first lens element is CT1, a central thickness of the second lens element is CT2, a central thickness of the fourth lens element is CT4, an axial distance between the first lens element and the second lens element is T12, a focal length of the photographing optical system is f, a curvature radius of the image-side surface of the third lens element is R6, an Abbe number of the second lens element is V2, an Abbe number of the third lens element is V3, and the following conditions are satisfied:
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