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Optical system, lens module and electronic equipment

An optical system, lens technology, applied in optics, optical components, instruments, etc.

Active Publication Date: 2022-06-10
NANCHANG OFILM HUAGUANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Based on this, it is necessary to provide an optical system, a lens module and an electronic device to solve the problem that the current lens module with focusing function is difficult to achieve a miniaturized design

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0098] The materials of the first lens L1 , the third lens L3 and the fourth lens L4 are all plastic, and the material of the second lens L2 is glass.

[0099] In addition, various parameters of the optical system 100 are given in Table 9, and the definition of each parameter can be obtained from the first embodiment, and will not be repeated here.

[0100] Table 9

[0101] Table 10

[0102] According to the parameter information provided above, the following data can be deduced:

[0103] See Figure 21 , in some embodiments, the optical system 100 can be assembled with the photosensitive element 210 to form the lens module 200 . At this time, the photosensitive surface of the photosensitive element 210 overlaps with the imaging surface S11 of the optical system 100 . The lens module 200 can also be provided with an infrared cut filter L5, and the infrared cut filter L5 is disposed between the image side S8 and the imaging surface S11 of the fourth lens L4. Specifically, ...

no. 2 example

no. 3 example

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Abstract

The invention relates to an optical system, a lens module and electronic equipment. The optical system includes: a first lens element with positive refractive power, the object-side surface of the first lens element being convex in a paraxial region thereof; a second lens element with refractive power, the image-side surface of the second lens element being concave in a paraxial region; a third lens element with negative refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof; a fourth lens element with positive refractive power, wherein the image-side surface of the fourth lens element near the optical axis is a convex surface; the fourth lens can move along the optical axis on the image side of the third lens; the optical system satisfies the following condition: TTL / fa is greater than or equal to 0.8 and less than or equal to 1.5. The optical system can give consideration to both the long-focus characteristic and the miniaturized design.

Description

technical field [0001] The invention relates to the field of imaging, in particular to an optical system, a lens module and electronic equipment. Background technique [0002] With the rapid development of camera technology, the application of optical systems in electronic devices such as smartphones, tablet computers, and e-readers is becoming more and more extensive. At the same time, the industry’s requirements for the shooting performance of electronic devices are also getting higher and higher. . Among them, a lens module with focusing function has appeared. Through focusing, the lens module can have good imaging quality for subjects within different object distances, which greatly improves the user experience. However, the current lens modules with focusing function usually need to move the entire optical system in the lens module during the focusing process, which makes it difficult to realize the miniaturization design of the lens module. Contents of the invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/14
CPCG02B15/143103
Inventor 粘明德
Owner NANCHANG OFILM HUAGUANG TECH CO LTD