News Column

Patent Issued for Optical Imaging Lens Assembly

June 18, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- A patent by the inventors Tsai, Tsung-Han (Taichung, TW); Huang, Hsin-Hsuan (Taichung, TW), filed on February 22, 2013, was published online on June 3, 2014, according to news reporting originating from Alexandria, Virginia, by VerticalNews correspondents.

Patent number 8743482 is assigned to Largan Precision Co., Ltd. (Taichung, TW).

The following quote was obtained by the news editors from the background information supplied by the inventors: "The present disclosure relates to an optical imaging lens assembly. More particularly, the present disclosure relates to a compact optical imaging lens assembly applicable to electronic products.

"In recent years, with the popularity of mobile products with camera functionalities, the demand for miniaturizing an optical lens system is increasing. The sensor of a conventional photographing camera is typically a CCD (Charge-Coupled Device) or a CMOS (Complementary Metal-Oxide-Semiconductor) sensor. As 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 systems featuring better image quality.

"A conventional compact optical lens system employed in a portable electronic product mainly adopts a four-element lens structure, such as U.S. Pat. No. 7,869,142 or a five-element lens structure, such as U.S. Pat. No. 8,000,031. Due to the popularity of mobile products with high-end specifications, such as smart phones and PDAs (Personal Digital Assistants), the pixel and image-quality requirements of the compact optical lens system have increased rapidly. However, the conventional four-element or five-element lens structure cannot satisfy the requirements of the compact optical lens system.

"Another conventional compact optical lens system has six-element lens structure, such as U.S. Publication No. 2012/0314304 A1. However, the second lens element does not have negative refractive power for correcting the chromatic aberration of the optical lens system. Moreover, the shape of the object-side surface can not corrected the astigmatism, and the excessive aberration also hardly be corrected."

In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventors' summary information for this patent: "According to one aspect of the present disclosure, an optical imaging lens assembly 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, a fifth lens element and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element with negative refractive power has a concave object-side surface. The third lens element has refractive power. The fourth lens element has refractive power. The fifth lens element with refractive power has a concave object-side surface and a convex image-side surface, wherein at least one of the object-side surface and the image-side surface of the fifth lens element is aspheric. The sixth lens element with refractive power has a concave image-side surface, wherein an object-side surface and the image-side surface of the sixth lens element are aspheric, and the sixth lens element has at least one inflection point on the image-side surface thereof. When a curvature radius of the object-side surface of the second lens element is R3, a curvature radius of an image-side surface of the second lens element is R4, a focal length of the optical imaging lens assembly is f, and a focal length of the fifth lens element is f5, the following relationships are satisfied: -5.0<(R3+R4)/(R3-R4)

URL and more information on this patent, see: Tsai, Tsung-Han; Huang, Hsin-Hsuan. Optical Imaging Lens Assembly. U.S. Patent Number 8743482, filed February 22, 2013, and published online on June 3, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8743482.PN.&OS=PN/8743482RS=PN/8743482

Keywords for this news article include: Electronics, Semiconductor, Largan Precision Co. Ltd..

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Source: Electronics Newsweekly


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