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Optical imaging lens group

A lens group, lens technology, applied in optics, optical components, instruments, etc., can solve the problem of unable to meet the photographic lens module, and achieve the effect of reducing system sensitivity, high resolution, and large viewing angle

Active Publication Date: 2012-07-04
LARGAN PRECISION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional miniaturized photographic lenses mounted on portable electronic products, as shown in US Patent No. 7,355,801, mostly use a four-piece lens structure. However, due to smart phones (Smart Phone) and PDA (Personal Digital Assistant) The prevalence of such high-end mobile devices has led to the rapid increase in the number of pixels and image quality of miniaturized photographic lenses. The known four-piece lens group will not be able to meet higher-end photographic lens modules. The trend of high performance and thinning is developing, so there is an urgent need for an optical imaging lens group that is suitable for thin, light and portable electronic products, has good imaging quality and does not make the total length of the lens too long

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0155] In the optical imaging lens group of embodiment 1, the focal length of the overall optical imaging lens group is f, the aperture value (f-number) of the overall optical imaging lens group is Fno, half of the maximum viewing angle in the overall optical imaging lens group is HFOV, and its relationship is:

[0156] f=3.83mm;

[0157] Fno=2.70;

[0158] HFOV = 37.6 degrees.

[0159] In Embodiment 1, the dispersion coefficient of the first lens 110 is V1, the dispersion coefficient of the second lens 120 is V2, and the dispersion coefficient of the third lens 130 is V3, and the relationship is as follows:

[0160] V1-V2=32.5;

[0161] |V2-V3|=0.0.

[0162] In Embodiment 1, the radius of curvature of the object-side surface 111 of the first lens 110 is R1, the radius of curvature of the image-side surface 112 is R2, the radius of curvature of the object-side surface 121 of the second lens 120 is R3, and the radius of curvature of the image-side surface 122 is R4 , the r...

Embodiment 2

[0192] The curve equation of the aspheric surface in embodiment 2 is expressed in the form of embodiment 1.

[0193] In the optical imaging lens group of embodiment 2, the focal length of the overall optical imaging lens group is f, the aperture value (f-number) of the overall optical imaging lens group is Fno, half of the maximum viewing angle in the overall optical imaging lens group is HFOV, and its relationship is:

[0194] f=3.83mm;

[0195] Fno=2.70;

[0196] HFOV = 37.4 degrees.

[0197] In Embodiment 2, the dispersion coefficient of the first lens 210 is V1, the dispersion coefficient of the second lens 220 is V2, and the dispersion coefficient of the third lens 230 is V3, and the relationship is as follows:

[0198] V1-V2=34.4;

[0199] |V2-V3|=2.0.

[0200] In Embodiment 2, the radius of curvature of the object-side surface 211 of the first lens 210 is R1, the radius of curvature of the image-side surface 212 is R2, the radius of curvature of the object-side sur...

Embodiment 3

[0230] The curve equation of the aspheric surface in embodiment 3 is expressed in the form of embodiment 1.

[0231] In the optical imaging lens group of embodiment 3, the focal length of the overall optical imaging lens group is f, the aperture value (f-number) of the overall optical imaging lens group is Fno, half of the maximum viewing angle in the overall optical imaging lens group is HFOV, and its relationship is:

[0232] f=4.00mm;

[0233] Fno=2.85;

[0234] HFOV = 37.0 degrees.

[0235] In Embodiment 3, the dispersion coefficient of the first lens 310 is V1, the dispersion coefficient of the second lens 320 is V2, and the dispersion coefficient of the third lens 330 is V3, and the relationship is as follows:

[0236] V1-V2=32.1;

[0237] |V2-V3|=0.0.

[0238] In Embodiment 3, the radius of curvature of the object-side surface 311 of the first lens 310 is R1, the radius of curvature of the image-side surface 312 is R2, the radius of curvature of the object-side sur...

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Abstract

The invention provides an optical imaging lens group. The optical imaging lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side, wherein the first lens has positive refractive power, and the surface of the object side of the first lens is a convex surface; the second lens has negative refractive power; and the surface of the image side of the fifth lens is a concave surface and has at least one point of inflexion. In a lens configuration mode, the optical imaging lens group has a large viewing angle, system sensitivity is reduced, and high resolution power can be obtained.

Description

technical field [0001] The present invention relates to an optical imaging lens group, and in particular to a miniaturized optical imaging lens group applied to electronic products. Background technique [0002] In recent years, with the rise of portable electronic products with photography functions, the demand for miniaturized photography lenses is increasing. The photosensitive component of a general photographic lens is nothing more than two types of photosensitive coupled device (Charge Coupled Device, CCD) or complementary metal oxide semiconductor sensor (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor), and with the advancement of semiconductor technology, The pixel size of the photosensitive component is reduced, and the miniaturized photographic lens is gradually developing into the high-pixel field. Therefore, the requirements for image quality are also increasing. [0003] Traditional miniaturized photographic lenses mounted on portable electronic pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B13/06G02B1/04
Inventor 黄歆璇蔡宗翰
Owner LARGAN PRECISION
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