News Column

"Image Lens Assembly System" in Patent Application Approval Process

September 3, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- A patent application by the inventors TSAI, Tsung-Han (Taichung City, TW); CHOU, Ming-Ta (Taichung City, TW), filed on April 15, 2014, was made available online on August 21, 2014, according to news reporting originating from Washington, D.C., by VerticalNews correspondents.

This patent application is assigned to Largan Precision Co., Ltd.

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

"In recent years, with the popularity of mobile products with camera functionalities, the demand of miniaturized optical lens systems 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 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 systems featuring better image quality.

"A conventional compact optical lens system employed in a portable electronic product mainly adopts a five-element lens structure such as the one disclosed in 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 five-element lens structure cannot satisfy the requirements of the compact optical lens system.

"Although other conventional optical lens system with six-element lens structure is disclosed, such as U.S. Publication No. 2012/0170142. However, the two lens elements of the optical lens system closest to the object side are not configured as one with negative refractive power and the other with greater positive refractive power, so that the back focal length of optical lens system cannot be reduced. As a result, when the field of view of the optical lens system is increased, the total track length thereof is getting hard to be maintained, and the aberration and the distortion thereof cannot be eliminated by the mutual compensating effect generated from the aforementioned two lens elements."

In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventors' summary information for this patent application: "According to one aspect of the present disclosure, an image lens assembly 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, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with negative refractive power has a convex object-side surface. The second lens element has positive refractive power. The third lens element has refractive power. The fourth lens element has refractive power. The fifth lens element has refractive power. The sixth lens element with refractive power is made of plastic material, wherein at least one of an object-side surface and an image-side surface of the sixth lens element is aspheric. The seventh lens element with refractive power is made of plastic material and has a concave image-side surface, wherein the image-side surface of the seventh lens element changes from concave in a paraxial region thereof to convex in a peripheral region thereof, and at least one of an object-side surface and the image-side surface thereof is aspheric. A sum of central thicknesses from the first through seventh lens elements is .SIGMA.CT, an axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is Td, and the following relationship is satisfied:

"0.60<.SIGMA.CT/Td

BRIEF DESCRIPTION OF THE DRAWINGS

"The disclosure can be more fully understood by reading the following detailed description of the embodiments, with reference made to the accompanying drawings as follows:

"FIG. 1 is a schematic view of an image lens assembly system according to the 1st embodiment of the present disclosure;

"FIG. 2 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image lens assembly system according to the 1st embodiment;

"FIG. 3 is a schematic view of an image lens assembly system according to the 2nd embodiment of the present disclosure;

"FIG. 4 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image lens assembly system according to the 2nd embodiment;

"FIG. 5 is a schematic view of an image lens assembly system according to the 3rd embodiment of the present disclosure;

"FIG. 6 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image lens assembly system according to the 3rd embodiment;

"FIG. 7 is a schematic view of an image lens assembly system according to the 4th embodiment of the present disclosure;

"FIG. 8 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image lens assembly system according to the 4th embodiment;

"FIG. 9 is a schematic view of an image lens assembly system according to the 5th embodiment of the present disclosure;

"FIG. 10 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image lens assembly system according to the 5th embodiment;

"FIG. 11 is a schematic view of an image lens assembly system according to the 6th embodiment of the present disclosure;

"FIG. 12 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image lens assembly system according to the 6th embodiment;

"FIG. 13 is a schematic view of an image lens assembly system according to the 7th embodiment of the present disclosure;

"FIG. 14 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image lens assembly system according to the 7th embodiment;

"FIG. 15 is a schematic view of an image lens assembly system according to the 8th embodiment of the present disclosure;

"FIG. 16 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image lens assembly system according to the 8th embodiment;

"FIG. 17 is a schematic view of an image lens assembly system according to the 9th embodiment of the present disclosure;

"FIG. 18 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image lens assembly system according to the 9th embodiment;

"FIG. 19 is a schematic view of an image lens assembly system according to the 10th embodiment of the present disclosure; and

"FIG. 20 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image lens assembly system according to the 10th embodiment."

URL and more information on this patent application, see: TSAI, Tsung-Han; CHOU, Ming-Ta. Image Lens Assembly System. Filed April 15, 2014 and posted August 21, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=3894&p=78&f=G&l=50&d=PG01&S1=20140814.PD.&OS=PD/20140814&RS=PD/20140814

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

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Source: Electronics Newsweekly


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