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Wide-angle lens and imaging equipment

A wide-angle lens and lens technology, which is applied in the field of imaging lens, achieves the effects of compact structure, wide viewing angle and good imaging quality

Active Publication Date: 2021-09-17
JIANGXI LIANYI OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the object of the present invention is to provide a wide-angle lens and imaging equipment to solve the technical problem that the wide-angle lens cannot better realize wide viewing angle, miniaturization and high-quality imaging balance in the prior art

Method used

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  • Wide-angle lens and imaging equipment
  • Wide-angle lens and imaging equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0067] see figure 1 , which is a schematic structural view of the wide-angle lens 100 provided in the first embodiment of the present invention, the wide-angle lens 100 includes in sequence from the object side to the imaging surface along the optical axis: a first lens L1, a stop ST, a second lens L2, and a third lens L3, the fourth lens L4, the fifth lens L5 and the filter G1.

[0068] The first lens L1 has negative refractive power, the object side S1 of the first lens is a convex surface, and the image side S2 of the first lens is a concave surface;

[0069] The second lens L2 has positive refractive power, the object side S3 of the second lens is a convex surface, and the image side S4 of the second lens is a convex surface;

[0070] The third lens L3 has positive refractive power, the object side S5 of the third lens is concave, and the image side S6 of the third lens is convex;

[0071] The fourth lens L4 has negative refractive power, the object side S7 of the fourth...

no. 2 example

[0084] The wide-angle lens provided by the second embodiment of the present invention is substantially the same as the wide-angle lens 100 in the first embodiment, except that the radius of curvature and material selection of each lens are different.

[0085] The relevant parameters of each lens in the wide-angle lens provided in this embodiment are shown in Table 3.

[0086] table 3

[0087]

[0088] The surface coefficients of each aspheric surface of the wide-angle lens in this embodiment are shown in Table 4.

[0089] Table 4

[0090]

[0091] Please refer to Figure 4 and Figure 5 , respectively show the field curvature curve and the vertical axis chromatic aberration curve of the wide-angle lens provided by this embodiment.

[0092] Figure 4 Indicates the degree of curvature of the meridional image plane and sagittal image plane. From Figure 4 It can be seen from the figure that the field curvature of the meridian image plane and the sagittal image plane ...

no. 3 example

[0095] The wide-angle lens provided by the third embodiment of the present invention is substantially the same as the wide-angle lens 100 in the first embodiment, except that the curvature radius and material selection of each lens are different.

[0096] The relevant parameters of each lens in the wide-angle lens provided in this embodiment are shown in Table 5.

[0097] table 5

[0098]

[0099] The surface coefficients of each aspheric surface of the wide-angle lens in this embodiment are shown in Table 6.

[0100] Table 6

[0101]

[0102] Please refer to Figure 6 and Figure 7 , showing the field curvature curve and the vertical axis chromatic aberration curve of the wide-angle lens respectively.

[0103] Figure 6 Indicates the degree of curvature of the meridional image plane and sagittal image plane. From Figure 6 It can be seen from the figure that the field curvature of the meridian image plane and the sagittal image plane is controlled within ±0.2mm, ...

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Abstract

The invention discloses a wide-angle lens and an imaging device. The wide-angle lens includes in sequence from the object side to the imaging surface along the optical axis: a first lens with negative refractive power, the object side is convex, and the image side is concave; a diaphragm; The second lens with positive refractive power, its object side and image side are both convex; the third lens with positive refractive power, its object side is concave, and the image side is convex; the fourth lens with negative refractive power, its object The side is convex at the near optical axis and has at least one inflection point, the image side is concave at the near optical axis and has at least one inflection point; a fifth lens with positive optical power, the object side of which is at the near optical axis Convex with at least one point of inflection, image side concave at near optical axis with at least one point of inflection. The wide-angle lens can achieve a balance of wide angle of view, miniaturization, and high-quality imaging.

Description

technical field [0001] The invention relates to the technical field of imaging lenses, in particular to a wide-angle lens and imaging equipment. Background technique [0002] With the rapid growth of the consumer electronics market and the popularity of social networking, video, and live broadcast software, people have higher and higher requirements for the imaging quality of camera lenses. Camera lenses have even become the primary consideration for consumers when purchasing electronic devices. [0003] With the continuous development of mobile information technology, portable electronic devices such as smartphones are also developing in the direction of thinner and lighter, full-screen, ultra-high-definition imaging, etc. In order to pursue better imaging effects, this has a great impact on portable electronic devices. Camera lenses put forward higher requirements. Because wide-angle lenses are widely used, they are very useful for shooting large-scale scenes at close ran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18G02B1/04
CPCG02B1/041G02B13/0045G02B13/06G02B13/18
Inventor 于笑枝曾昊杰刘绪明曾吉勇
Owner JIANGXI LIANYI OPTICS CO LTD
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