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mobile phone external lens

A lens and mobile phone technology, applied in the structure of telephones, instruments, branch office equipment, etc., can solve the problems of blurred corners of the image, large chromatic aberration and distortion, and large outer diameter of the external lens of the mobile phone.

Active Publication Date: 2022-08-02
JIANGXI LIANYI OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned external lens of the mobile phone increases the original focal length of the mobile phone lens, the center of the image is clear when shooting, but the four corners of the image are blurred
In addition, at the same magnification, the outer diameter of the external lens of the mobile phone is larger, and the chromatic aberration and distortion are larger

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] see Figure 1a , is a mobile phone external lens 100 provided in the first embodiment of the present invention. In this embodiment, the relevant parameters of each lens are shown in Table 2.

[0069] Table 2

[0070] surface serial number r d n d

Vd 1 thing — endless 2 Lens 1 17.035 7.52 1.618 63.42 3 38.980 5.98 4 Lens 2 55.565 4.27 1.651 21.51 5 47.132 0.5 6 Lens 3 54.300 4.80 1.741 27.76 7 -54.300 0.10 8 Lens 4 19.970 1.20 2.022 29.06 9 Lens 5 4.776 2.68 1.470 66.90 10 23.413 2.87 11 plate glass — 0.50 1.523 54.51 12 — 0.40 13 diaphragm — 4.15 14 image plane — —

[0071] It can be seen from Table 2 that the curvature radius of the mirror surface of the third lens L3 facing the object side is equal to the curvature radius of the mirror surface facing the imaging surface.

[0072] In this em...

Embodiment 2

[0077] see Figure 2a , is a mobile phone external lens 200 provided in the second embodiment of the present invention. The mobile phone external lens 200 in this embodiment is roughly the same in structure as the mobile phone external lens 100 in the first embodiment, and the difference is In this embodiment, the third lens L3 is a plastic aspheric lens, and the curvature radius and material of each lens are changed.

[0078] In this embodiment, the relevant parameters of each lens are shown in Table 4.

[0079] Table 4

[0080] surface serial number r d n d

Vd 1 thing — endless 2 Lens 1 16.395 5.89 1.788 47.51 3 22.022 4.90 4 Lens 2 9.665 3.83 1.640 23.53 5 5.635 0.99 6 Lens 3 7.793 3.71 1.535 55.69 7 44.597 0.41 8 Lens 4 25.334 0.69 2.002 29.06 9 Lens 5 4.515 3.812 1.517 52.19 10 91.636 2.89 11 plate glass — 0.50 1.523 54.51 12 ...

Embodiment 3

[0088] see Figure 3a , is a mobile phone external lens 300 provided in the third embodiment of the present invention. The structure of the mobile phone external lens 300 in this embodiment is roughly the same as that of the mobile phone external lens 200 in the second embodiment, and the difference is In this embodiment, the third lens L3 is a glass spherical lens, and the curvature radius and material of each lens are changed.

[0089] In this embodiment, the relevant parameters of each lens are shown in Table 6.

[0090] Table 6

[0091] surface serial number r d n d

Vd 1 thing — endless 2 Lens 1 17.890 5.71 1.620 60.37 3 26.560 7.76 4 Lens 2 10.127 1.98 1.651 21.51 5 6.920 0.88 6 Lens 3 11.583 4.13 1.801 34.97 7 30.480 2.13 8 Lens 4 12.031 0.62 2.022 29.06 9 Lens 5 3.928 3.21 1.581 40.92 10 13.932 2.64 11 plate glass — 0.5 1.523 54.5...

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Abstract

The invention provides an external lens for a mobile phone, which comprises a meniscus-type first lens with positive refractive power and a concave surface facing the imaging surface, a second lens with negative refractive power, and a A third lens, a meniscus-type fourth lens with negative refractive power and a concave surface facing the imaging surface, and a meniscus-type fifth lens with negative refractive power and a concave surface facing the imaging surface, wherein the second lens is a plastic non-contact lens Spherical lens; the fourth lens and the fifth lens are cemented to form a composite lens with negative refractive power; the optical centers of each lens are located on the same straight line, and the outer diameter of each lens decreases sequentially from the object side to the imaging surface. Small. In the present invention, since the second lens is a plastic aspherical lens, the center and four corners of the image are displayed clearly during shooting, and the distortion can be reduced. In addition, the combined structure of the external lens of the mobile phone increases the focal length of the system , the chromatic aberration is reduced.

Description

technical field [0001] The invention relates to the technical field of external lenses, in particular to an external lens of a mobile phone. Background technique [0002] In recent years, with the continuous advancement of science and technology, mobile phones are constantly developing in the direction of intelligence, miniaturization and touch screen, integrating functions such as communication, entertainment, and photography, and various applications have greatly satisfied users. demand. Due to the limitation of the size and weight of the mobile phone, a mobile phone with an integrated camera function can generally only perform simple shooting, and cannot meet the needs of users for long-distance shooting, optical zoom, or high-definition shooting. [0003] In the prior art, in order to make up for this deficiency and obtain a better shooting effect, an external lens is usually installed at the lens of the mobile phone. Due to the configuration of the external lens, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00H04M1/02
CPCH04M1/0202G02B13/0045
Inventor 辛保云张晴雯胡昊明余兆烽
Owner JIANGXI LIANYI OPTICS CO LTD
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