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Optical system, lens module and terminal equipment

An optical system and lens technology, applied in optics, optical components, instruments, etc., can solve problems such as poor picture quality, insufficient clarity, and unsatisfactory long-range photography effects

Pending Publication Date: 2020-09-04
JIANGXI JINGCHAO OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current camera lens usually needs to have the characteristics of miniaturization. With the increase of the demand for long-range shooting, the camera lens needs to have a long focal length, but it is prone to problems such as insufficient clarity and poor image quality, resulting in unsatisfactory long-range photography.

Method used

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  • Optical system, lens module and terminal equipment
  • Optical system, lens module and terminal equipment
  • Optical system, lens module and terminal equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Such as figure 1 As shown, the straight line 11 represents the optical axis, the side of the first lens L1 away from the second lens L2 is the object side 12 , and the side of the sixth lens L6 away from the fifth lens L5 is the image side 13 . In the optical system provided by this embodiment, from the object side 12 to the image side 13 are the diaphragm STO, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the Six lenses L6, seventh lens L7, eighth lens L8, infrared filter element IRCF.

[0054] The first lens L1 has a positive refractive power and is made of plastic material. Its object side S1 is convex at the optical axis, its object side S1 is concave at the circumference, and its image side S2 is convex at the optical axis and at the circumference. And both are aspherical.

[0055] The second lens L2 has negative refractive power and is made of plastic material. The object side S3 is convex at the optical axis an...

Embodiment 2

[0078] Such as image 3 As shown, the straight line 11 represents the optical axis, the side of the first lens L1 away from the second lens L2 is the object side 12 , and the side of the sixth lens L6 away from the fifth lens L5 is the image side 13 . In the optical system provided by this embodiment, from the object side 12 to the image side 13 are the diaphragm STO, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the Six lenses L6, seventh lens L7, eighth lens L8, infrared filter element IRCF.

[0079] The first lens L1 has a positive refractive power and is made of plastic material. Its object side S1 is convex at the optical axis, its object side S1 is concave at the circumference, and its image side S2 is convex at the optical axis and at the circumference. And both are aspherical.

[0080] The second lens L2 has positive refractive power and is made of plastic material. The object side S3 is convex at the optical axis an...

Embodiment 3

[0100] Such as Figure 5 As shown, the straight line 11 represents the optical axis, the side of the first lens L1 away from the second lens L2 is the object side 12 , and the side of the sixth lens L6 away from the fifth lens L5 is the image side 13 . In the optical system provided by this embodiment, from the object side 12 to the image side 13 are the diaphragm STO, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the Six lenses L6, seventh lens L7, eighth lens L8, infrared filter element IRCF.

[0101] The first lens L1 has a positive refractive power and is made of plastic material. Its object side S1 is convex at the optical axis, its object side S1 is concave at the circumference, and its image side S2 is convex at the optical axis and at the circumference. And both are aspherical.

[0102] The second lens L2 has negative refractive power and is made of plastic material. The object side S3 is convex at the optical axis a...

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Abstract

The embodiment of the invention discloses an optical system, a lens module and terminal equipment. The optical system comprises first lenses which are sequentially arranged from an object side to an image side and have positive refractive power. A third lens element with negative refractive power, a second lens element with refractive power, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element, the object-side surface of the first lens element being convex at the optical axis, the image-side surface of the third lens element beingconcave at the optical axis, and the image-side surface of the fourth lens element being convex at the optical axis; the optical system satisfies the following conditional expression: TTL / f < 1.1, wherein the TTL is the distance between the object side surface of the first lens and the imaging surface of the optical system on the optical axis, and the f is the focal length of the optical system.By reasonably configuring the refractive power and surface type of the first lens to the eighth lens in the optical system and limiting TTL / f to be less than 1.1, the optical system has the characteristic of long focal length and has good imaging quality while meeting the micro design.

Description

technical field [0001] The present application belongs to the technical field of optical imaging, and in particular relates to an optical system, a lens module and a terminal device. Background technique [0002] With the widespread application of electronic products such as mobile phones, tablet computers, drones, and computers in daily life, various technological improvements have been introduced. Among them, the improvement and innovation of the shooting effect of the camera lens in new electronic products has become the focus of people's attention. [0003] The current camera lens usually needs to have the characteristics of miniaturization. With the increase of the demand for long-range shooting, the camera lens needs to have a long focal length, but it is prone to problems such as insufficient clarity and poor image quality, resulting in unsatisfactory long-range photography. [0004] Therefore, how to increase the focal length and improve the image quality while sati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B13/22
CPCG02B13/0045G02B13/18G02B13/22
Inventor 杨健李明
Owner JIANGXI JINGCHAO OPTICAL CO LTD
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