Optical image capturing system

An optical imaging system, optical axis technology, applied in optics, optical components, instruments, etc., can solve the problems of small design freedom and increase the design difficulty of optical imaging system, and achieve optimized optical parameters, miniaturized imaging quality, and good imaging. quality effect

Pending Publication Date: 2021-02-26
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, portable electronic products such as smartphones and tablet computers on the market are gradually becoming smaller, which makes the optical imaging system applied to them suitable for portable electronic products. Satisfy the characteristics of miniaturization, thinness and lightness, which undoubtedly increases the difficulty of designing the optical imaging system
In addition, with the improvement of image sensor performance and the reduction of size, the design freedom of the corresponding optical imaging system is getting smaller and smaller, which further increases the difficulty of designing the optical imaging system.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0069] Such as figure 1 As shown, the optical imaging system includes in sequence from the object side to the image side: the first lens E1, the second lens E2, the diaphragm STO, the 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.

[0070] 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 concave, and its image side S4 is concave. The third lens E3 has negative refractive power, its object side S5 is concave, and its image side S6 is convex. The fourth lens E4 has negative ref...

Embodiment 2

[0084] Refer to the following Figure 3 to Figure 4C An optical imaging system 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 optical imaging system according to Embodiment 2 of the present application is shown.

[0085] Such as image 3 As shown, the optical imaging system includes in sequence from the object side to the image side: the first lens E1, the second lens E2, the diaphragm STO, the 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.

[0086] 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 l...

Embodiment 3

[0098] Refer to the following Figure 5 to Figure 6C An optical imaging system according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging system according to Embodiment 3 of the present application is shown.

[0099] Such as Figure 5 As shown, the optical imaging system includes in sequence from the object side to the image side: the first lens E1, the second lens E2, the diaphragm STO, the 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.

[0100] 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 concave, and its image side S6 is convex. The fourth lens E4 has negative re...

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Abstract

The invention discloses an optical imaging system. The optical imaging system sequentially comprises the following lenses from an object side to an image side along an optical axis: a first lens having positive focal power; a second lens having negative focal power; a diaphragm; a third lens having focal power; a fourth lens which has negative focal power, wherein the image side surface of the fourth lens is a convex surface; a fifth lens having focal power; a sixth lens which has focal power, wherein the object side surface of the sixth lens is a concave surface; and a seventh lens having focal power. The distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging system on the optical axis and half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging system satisfy the following formula: 1.0 < TTL / ImgH < 1.3.

Description

technical field [0001] The present application relates to the field of optical elements, in particular, to an optical imaging system. Background technique [0002] With the development of society, portable electronic products such as smartphones and tablet computers have become indispensable tools in people's lives. At present, portable electronic products such as smartphones and tablet computers on the market are gradually becoming smaller, which makes the optical imaging system applied to them suitable for portable electronic products. Satisfying the characteristics of miniaturization, thinness and lightness, undoubtedly increases the difficulty of designing the optical imaging system. In addition, as the performance of the image sensor improves and the size decreases, the design freedom of the corresponding optical imaging system becomes smaller and smaller, which further increases the difficulty of designing the optical imaging system. [0003] How to rationally set te...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/18
Inventor 杨泉锋袁莹辉戴付建赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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