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Imaging lens

A technology of imaging lens and imaging surface, which is applied in the field of imaging lens, can solve the problems of unfavorable distant objects, lack of design freedom, and the difficulty of imaging lens to meet the demand of high imaging performance, etc.

Active Publication Date: 2020-07-10
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the miniaturization of the imaging lens, it is usually necessary to reduce the number of lenses of the imaging lens as much as possible, but the resulting lack of design freedom will make it difficult for the imaging lens to meet the market demand for high imaging performance
[0007] In addition, the current mainstream imaging lenses usually use a wide-angle optical system in order to obtain images with a wide viewing angle, but it is not conducive to shooting distant objects, and it is impossible to obtain clear images at a distance, and the user experience is not good

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Refer to the following Figure 1 to Figure 2D An imaging lens according to Embodiment 1 of the present application is described. figure 1 A schematic structural diagram of an imaging lens according to Embodiment 1 of the present application is shown.

[0069] like figure 1 As shown, the imaging lens includes six lenses E1-E6 arranged in sequence from the object side to the imaging side along the optical axis. The first lens E1 has positive refractive power, and its object side S1 and image side S2 are both aspherical surfaces; the second lens E2 has negative refractive power, and its object side S3 and image side S4 are both aspherical surfaces; the third lens E3 has positive refractive power, and its object side S5 and image side S6 are both aspherical; the fourth lens E4 has positive refractive power, and its object side S7 and image side S8 are both aspherical; the fifth lens E5 has negative Refractive power, the object side S9 and the image side S10 are both asph...

Embodiment 2

[0083] Refer to the following Figure 3 to Figure 4D An imaging lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. image 3 A schematic structural diagram of an imaging lens according to Embodiment 2 of the present application is shown.

[0084] like image 3 As shown, the imaging lens includes six lenses E1-E6 arranged in sequence from the object side to the imaging side along the optical axis. The first lens E1 has positive refractive power, and its object side S1 and image side S2 are both aspherical surfaces; the second lens E2 has negative refractive power, its object side S3 is spherical, and its image side S4 is aspherical; Lens E3 has positive refractive power, its object side S5 is aspherical, and its image side S6 is spherical; the fourth lens E4 has positive refractive power, its object side S7 is aspherica...

Embodiment 3

[0095] Refer to the following Figure 5 to Figure 6D An imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of an imaging lens according to Embodiment 3 of the present application is shown.

[0096] like Figure 5 As shown, the imaging lens includes six lenses E1-E6 arranged in sequence from the object side to the imaging side along the optical axis. The first lens E1 has positive refractive power, and its object side S1 and image side S2 are both aspherical surfaces; the second lens E2 has negative refractive power, and its object side S3 and image side S4 are both aspherical surfaces; the third lens E3 has negative refractive power, and its object side S5 and image side S6 are both aspherical surfaces; the fourth lens E4 has negative refractive power, and its object side S7 and image side S8 are both aspherical surfaces; the fifth lens E5, The sixth lens E6 has negative refractive power, and its object s...

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Abstract

The invention discloses an imaging lens. The imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an imageside along an optical axis, the first lens has positive focal power, and the object side surface of the first lens is a convex surface; the second lens has negative focal power, and the image side surface of the second lens is a concave surface; the third lens has focal power; the fourth lens has focal power, and the image side surface of the fourth lens is a convex surface; the fifth lens has focal power; the sixth lens has focal power; and the sum sigma CT of the distance TTL from the object side surface of the first lens to the imaging surface of the imaging lens in the optical axis and the center thicknesses of the first lens to the sixth lens on the optical axis meets the condition that TTL / sigma CT is greater than or equal to 1.84 and less than or equal to 2.25; and the spacing distance T12 between the first lens and the second lens in the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy 0.13 < = T12 / CT2 < = 1.18.

Description

[0001] divisional application [0002] This application is a divisional application of the Chinese invention patent application with the title of "imaging lens" and application number 201710414137.5 submitted on June 5, 2017. technical field [0003] The present invention relates to an imaging lens, and more particularly, the present invention relates to an imaging lens including six lenses. Background technique [0004] In recent years, with the improvement of the performance and the reduction of the size of commonly used photosensitive elements such as CCD (Charge-Coupled Device) or CMOS (Complementary Metal-Oxide Semiconductor, complementary metal oxide semiconductor elements), for matching use The high imaging quality and miniaturization of the lens have put forward higher requirements. [0005] With the popularization of portable electronic products, people's requirements on the imaging quality of portable electronic products with a camera function are gradually becomi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/02G02B13/18
CPCG02B13/0045G02B13/02G02B13/18
Inventor 张凯元
Owner ZHEJIANG SUNNY OPTICAL CO LTD