Image capturing system

Abstract

An image capturing 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 at a paraxial region. The second lens element and the third lens element have refractive power. The fourth lens element with negative refractive power has a concave object-side surface at a paraxial region and a convex image-side surface at a paraxial region. The fifth lens element with refractive power has an image-side surface, wherein the image-side surface changes from concave at a paraxial region to convex at a peripheral region, and an object-side surface and the image-side surface of the fifth lens element are aspheric. The image capturing system has a total of five lens elements with refractive power.

Description

RELATED APPLICATIONS[0001]The application claims priority to Taiwan Application Serial Number TW 102107602, filed on Mar. 5, 2013, which is herein incorporated by reference.BACKGROUND[0002]1. Technical Field[0003]The present disclosure relates to an image capturing system. More particularly, the present disclosure relates to a compact image capturing system applicable to electronic products.[0004]2. Description of Related Art[0005]In recent years, with the rapid development of consumer electronics, there is an ever increasing need to keep the products as compact as possible, and accordingly, the internal product components are required to have their size minimized so as to make the whole product more compact and portable. Also, as the advanced semiconductor manufacturing technologies have allowed the pixel size of sensors to be reduced and compact optical lens systems have gradually evolved toward the field of higher megapixels, there is an increasing demand for compact optical lens...

AI Technical Summary

Benefits of technology

The patent text describes the arrangement of lens elements in a camera to effectively correct aberration and improve image quality. The refractive power between certain lens elements is balanced to reduce astigmatism and improve the overall resolution of the system. The shape of the lens elements is also designed to be proper, which makes them easier to manufacture and assemble. This results in a more compact and efficient camera design.

Problems solved by technology

However, the conventional four-element lens structure cannot satisfy these requirements of the compact optical lens system.

It is thereby not favorable for correcting the astigmatism and coma, and the image quality cannot be effectively improved.

Inasmuch as the foregoing, it has become an important issue in the Optics to keep the optical lens systems compact while including other mechanical components for achieving better image quality.

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