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Optical imaging system

An optical imaging system and optical axis technology, applied in optics, optical components, instruments, etc., can solve the problems of being unable to meet the needs of shooting close-up shots and zooming in on the subject, and achieve the effect of maintaining the characteristics of the telephoto lens and good imaging quality

Pending Publication Date: 2021-11-16
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the rapid development of mobile phone lenses, mobile phone lenses with high imaging quality and large image area have become more and more popular. However, many mobile phones often fail to zoom in on the subject when shooting distant objects. , so there is no way to meet the needs of shooting close-up

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0102] figure 1 It is a schematic diagram of the structure of the lens group in Embodiment 1 of the optical imaging system of the present invention. The optical imaging system includes in sequence from the object side to the image side along the optical axis: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, The fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8 and the imaging surface S17.

[0103] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has positive refractive power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has positive refractive power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has negative refractive power, its object side S9 is con...

Embodiment 1

[0111] The optical imaging system in embodiment 1 satisfies:

[0112] TTL / f=1.17; wherein, TTL is the on-axis distance from the object side of the first lens to the imaging surface, and f is the effective focal length of the optical imaging system.

[0113] f5 / f=-7.47; wherein, f is the effective focal length of the optical imaging system, and f5 is the effective focal length of the fifth lens.

[0114] R2 / R1=8.01; wherein, R1 is the radius of curvature of the object side of the first lens, and R2 is the radius of curvature of the image side of the first lens.

[0115] f6 / f7=-2.27; wherein, f6 is the effective focal length of the sixth lens, and f7 is the effective focal length of the seventh lens.

[0116] (R9+R10) / (R9-R10)=2.39; wherein, R9 is the radius of curvature of the object side of the fifth lens, and R10 is the radius of curvature of the image side of the fifth lens.

[0117] R12 / R13=1.38; wherein, R11 is the radius of curvature of the object side of the sixth lens...

specific Embodiment 2

[0130] image 3 It is a schematic diagram of the structure of the lens group in Embodiment 2 of the optical imaging system of the present invention. The optical imaging system includes in sequence from the object side to the image side along the optical axis: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, The fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8 and the imaging surface S17.

[0131] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has positive refractive power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has positive refractive power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has negative refractive power, its object side S9 is con...

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Abstract

The invention discloses an optical imaging system, which sequentially comprises from an object side to an image side along an optical axis: a diaphragm; a first lens with focal power; a second lens with focal power; a third lens with focal power; a fourth lens with focal power, wherein the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; a fifth lens with negative focal power; a sixth lens with focal power; and a seventh lens with focal power, wherein the object side surface of the seventh lens is a concave surface. By reasonably controlling the effective focal length of the fifth lens, the focal power of the system can be reasonably distributed, so that the positive and negative spherical aberrations of the front-group lens and the rear-group lens are mutually counteracted.

Description

technical field [0001] The invention belongs to the field of optical imaging, in particular to an optical imaging system including seven lenses. Background technique [0002] In recent years, with the rapid development of mobile phone lenses, mobile phone lenses with high imaging quality and large image area have become more and more popular. However, many mobile phones often fail to zoom in on the subject when shooting distant objects. , so there is no way to meet the needs of shooting close-ups. In order to meet the requirements of high imaging quality and large image area, the present invention provides an optical imaging system with telephoto, large image area, and large aperture to meet the higher-order imaging requirements for mobile phones. Contents of the invention [0003] The purpose of this application is to provide an optical imaging system composed of seven lenses, which has the characteristics of high pixel, large image surface and good imaging quality. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/18
Inventor 崔甲臣黄林戴付建赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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