Image capturing lens assembly

Abstract

This invention provides an image capturing lens assembly in order from an object side to an image side comprising: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with negative refractive power having a concave object-side surface; a fourth lens element having a concave object-side surface and a convex image-side surface; and a fifth lens element having a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one inflection point being formed on at least one of the object-side and image-side surfaces thereof. By such arrangement, it can effectively reduce the aberration as well as the total track length of the imaging lens system for obtaining higher image resolution.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No. 100118075 filed in Taiwan, R.O.C. on May 24, 2011, the entire contents of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to an image capturing lens assembly, and more particularly, to a compact image capturing lens assembly used in electronic products.[0004]2. Description of the Prior Art[0005]In the process of technical innovation, with the popularity of mobile phones equipped with camera, the demand for compact photographing lenses is increasing. Generally, the sensor of a general photographing camera is none other than CCD (Charge Coupled Device) or CMOS device (Complementary Metal Oxide Semiconductor device). Furthermore, advances in semiconductor manufacturing technology have allowed the pixel size of sensors to be reduced and therefore lead imagin...

AI Technical Summary

Benefits of technology

The present invention provides an image capturing lens assembly that can effectively reduce aberration and the total track length of the lens system for obtaining higher image resolution. The lens assembly comprises five lens elements with specific refractive powers and shapes that work together to correct astigmatism, aberration, and high order aberration. By using a combination of plastic and glass lens elements, the lens assembly can be made more compact and cost-effective. The first lens element with positive refractive power and a convex object-side surface helps to reduce the total track length of the lens system. The third lens element with negative refractive power and a concave object-side surface helps to correct astigmatism and improve image quality. The fourth lens element with positive refractive power and a concave image-side surface helps to correct astigmatism and improve image quality. The fifth lens element with negative refractive power and a concave image-side surface helps to correct high order aberration. The combination of these lens elements results in a compact lens system with improved image quality.

Problems solved by technology

However, due to the popularity of high standard mobile devices such as smart phones and PDAs (Personal Digital Assistant) driving the rapid improvements in high resolution and image quality of the current compact imaging lens systems, conventional four lens elements systems no longer satisfy the higher level camera modules.

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