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Lens and terminal equipment

A technology of terminal equipment and lens, which is applied in the field of lens, can solve the problem of poor depth recognition accuracy of the lens, and achieve the effect of meeting the requirements of depth recognition accuracy, large aperture, and improving depth recognition accuracy

Inactive Publication Date: 2019-04-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The lens and terminal equipment provided by the embodiments of the present application solve the problem of poor depth recognition accuracy of the lens in the prior art

Method used

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  • Lens and terminal equipment
  • Lens and terminal equipment

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0079] figure 1 Shown is a schematic view of the lens structure of the specific embodiment one, such as figure 1As shown, the lens includes a first lens 1, a second lens 2, a third lens 3 and a fourth lens 4 arranged in sequence along the main optical axis O from the measured object to the imaging surface 5, the first lens 1 and the second lens An aperture stop can be set between the two lenses 2, and the specific parameters of each lens are provided in Table 1, and the conic coefficient k and aspheric coefficient Ai (i=4, 6, 8, 10) of each lens surface are provided in Table 2. , 12, 14, 16, 18, 20).

[0080]

[0081] It can be seen from Table 1 that |f / f1|+|f / f2|=0.43, f / (2*Imh)=0.61, (L3R1+L3R2) / (L3R1-L3R2)=1.92, L4R1 / f=1 / 1.83 , RI / cos 4 (HFOV) = 1.27. Therefore, the lens of the specific embodiment 1 satisfies the limited range of the parameters of the lens group in the present application, and the lens group of the specific embodiment 1 can take into account the requ...

specific Embodiment 2

[0087] Figure 6 Shown is the lens structure of specific embodiment two, as Figure 6 As shown, the lens includes a first lens 1, a second lens 2, a third lens 3 and a fourth lens 4 arranged in sequence along the main optical axis O from the measured object to the imaging surface 5. Table 3 shows For the specific parameters of each lens, Table 4 gives the conic coefficient k and aspheric coefficient Ai (i=4, 6, 8, 10, 12, 14, 16, 18, 20) of each lens surface.

[0088]

[0089] It can be seen from Table 3 that |f / f1|+|f / f2|=0.32, f / (2*Imh)=0.6, (L3R1+L3R2) / (L3R1-L3R2)=1.74, L4R1 / f=1 / 1.81 , RI / cos 4 (HFOV) = 1.4. Therefore, the lens of the specific embodiment 2 satisfies the limited scope of the parameters of the lens group in the present application, and the lens group of the specific embodiment 2 can take into account the requirements of the TOF system on the lens illuminance and aperture value under the premise of ensuring the miniaturization of the lens, thereby Meet ...

specific Embodiment 3

[0096] Figure 10 Shown is the lens structure of specific embodiment three, as Figure 10 As shown, the lens includes a first lens 1, a second lens 2, a third lens 3 and a fourth lens 4 arranged in sequence along the main optical axis O from the measured object to the imaging surface 5. Table 5 shows For the specific parameters of each lens, Table 6 shows the conic coefficient k and aspheric coefficient Ai (i=4, 6, 8, 10, 12, 14, 16, 18, 20) of each lens surface.

[0097]

[0098] It can be seen from Table 5 that |f / f1|+|f / f2|=0.4, f / (2*Imh)=0.6, (L3R1+L3R2) / (L3R1-L3R2)=2.15, L4R1 / f=1 / 1.81 , RI / cos 4 (HFOV) = 1.26. Therefore, the lens of the specific embodiment three satisfies the limited scope of the parameters of the lens group in the present application, and the lens group of the specific embodiment three can take into account the requirements of the TOF system on the lens illuminance and aperture value under the premise of ensuring the miniaturization of the lens, th...

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Abstract

The embodiment of the invention provides a lens and terminal equipment, and relates to the technical field of lens. The lens comprises a lens group, the lens group comprises a first lens, a second lens, a third lens and a fourth lens, wherein the first lens, the second lens, the third lens and the fourth lens are arranged from the object side to the image side in sequence. The object side surfaceof the first lens is convex, the relative illuminance RI of the lens group and the quartic cos<4> (HFOV) of a cosine value of a half angle of view of the lens group meet the condition that RI / cos<4> (HFOV) is greater than or equal to 1, and the effective focal length f of the lens group and the entrance pupil diameter EPD of the lens group meets the condition that f / EPD is less than or equal to 1.3.

Description

technical field [0001] The present application relates to the technical field of lenses, and in particular to a lens and a terminal device. Background technique [0002] With the continuous development of portable devices such as mobile phones, the application of lens modules is becoming more and more diverse. Camera lenses are not limited to functions such as taking photos and video recordings, and near-infrared lenses for 3D modeling, face recognition, and action recognition are also developing rapidly. Sex is becoming more prominent. [0003] In near-infrared applications, especially the time-of-flight (TOF) method 3D modeling system in 3D applications, in the TOF system, the depth information of each point on the measured object needs to be obtained, so the brightness requirements of the lens very high. And because it is limited to the packaging requirements of portable devices, the control of lens size is also very strict. The current relatively mature lens structur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/004G02B13/18
Inventor 卢建龙
Owner HUAWEI TECH CO LTD
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