IMAGE CAPTURING OPTICAL SYSTEM, IMAGE CAPTURING DEVICE AND ELECTRONIC DEVICE

摘要

The present disclosure provides an image capturing optical system comprising: a positive first lens element having a convex object-side surface; a negative second lens element having a concave object-side surface; a third lens element; a fourth lens element having a convex object-side surface and a concave image-side surface, the object-side surface and the image-side surface thereof being aspheric; a fifth lens element having a concave image-side surface concave, both of the object-side surface and the image-side surface being aspheric, at least one of the object-side surface and the image-side surface having at least one convex shape in an off-axis region thereof.

主权项

1. An image capturing optical system, 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 with negative refractive power having an object-side surface being concave in a paraxial region thereof; a third lens element with refractive power; a fourth lens element with refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in the paraxial region thereof, the object-side surface and the image-side surface thereof being aspheric; and a fifth lens element with refractive power having an image-side surface being concave in a paraxial region thereof, an object-side surface and the image-side surface thereof being aspheric, at least one of the object-side surface and the image-side surface having at least one convex shape in an off-axis region thereof; wherein the image capturing optical system has a total of five lens elements with refractive power and an air gap is arranged between every two adjacent lens elements with refractive power; wherein a focal length of the second lens element is f2, a focal length of the first lens element is f1, a curvature radius of the object-side surface of the second lens element is R3, an axial distance between the first lens element and the second lens element is T12, 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, an axial distance between the fourth lens element and the fifth lens element is T45, and the following conditions are satisfied:
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