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optical lens

An optical lens and lens technology, applied in the field of optical lens, can solve problems such as insufficient space for optical component installation and focus adjustment, blurred image plane when out of focus, affecting system miniaturization, and low-cost goals

Active Publication Date: 2021-12-17
NINGBO SUNNY AUTOMOTIVE OPTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, high resolution can be obtained by increasing the number of lenses to 6-7 or more, but this will affect the realization of system miniaturization and low cost goals
The miniaturization requirements are usually met by controlling the total length of the lens, but the reduction of the total length will often lead to a shorter lens back focus, which will lead to insufficient space for optical components installation and focusing, resulting in mechanical interference
Generally, aspherical surfaces can be used to correct aberrations. If the lens is a plastic aspheric surface, due to the large thermal expansion coefficient of the plastic, there is a problem of blurring the out-of-focus image caused by temperature changes; if a glass aspheric surface is used, the cost is too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Refer to the following figure 1 An optical lens according to Embodiment 1 of the present application is described. figure 1 A schematic structural diagram of the optical lens according to Embodiment 1 of the present application is shown.

[0062] like figure 1 As shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens along the optical axis from the object side to the imaging side. Lens L7.

[0063] The first lens L1 is a meniscus lens with negative refractive power, the object side S1 is convex, and the image side S2 is concave.

[0064] The second lens L2 is a biconcave lens with negative refractive power, and its object side S3 and image side S4 are both concave.

[0065] The third lens L3 is a biconvex lens with positive refractive power, and its object side S5 and image side S6 are both convex. In addition, the third lens L3 is an aspheric lens, and ...

Embodiment 2

[0083] Refer to the following figure 2 An optical lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. figure 2 A schematic structural view of the optical lens according to Embodiment 2 of the present application is shown.

[0084] like figure 2 As shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens along the optical axis from the object side to the imaging side. Lens L7.

[0085] The first lens L1 is a meniscus lens with negative refractive power, the object side S1 is convex, and the image side S2 is concave.

[0086] The second lens L2 is a biconcave lens with negative refractive power, and its object side S3 and image side S4 are both concave.

[0087] The third lens L3 is a biconvex lens with pos...

Embodiment 3

[0102] Refer to the following image 3 An optical lens according to Embodiment 3 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. image 3 A schematic structural diagram of an optical lens according to Embodiment 3 of the present application is shown.

[0103] like image 3 As shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens along the optical axis from the object side to the imaging side. Lens L7.

[0104] The first lens L1 is a meniscus lens with negative refractive power, the object side S1 is convex, and the image side S2 is concave.

[0105] The second lens L2 is a biconcave lens with negative refractive power, and its object side S3 and image side S4 are both concave.

[0106] The third lens L3 is a meniscus lens with posi...

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PUM

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Abstract

The present application discloses an optical lens. The optical lens may include: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in order from the object side to the image side along the optical axis. and seventh lens. Wherein the first lens can have negative refractive power, its object side is convex, and the image side is concave; the second lens can have negative refractive power, and its object side and image side are concave; the third lens can have positive refractive power The fourth lens can have positive refractive power, and its object side and image side are convex; the fifth lens can have negative refractive power, its object side is convex, and the image side is concave; the sixth lens can have positive refractive power, The object side and the image side are both convex; and the seventh lens may have negative power, the object side is concave, and the image side is convex. According to the optical lens of the present application, at least one beneficial effect among miniaturization, high resolution, low cost, back focal length and the like can be realized.

Description

technical field [0001] The present application relates to an optical lens, and more particularly, the present application relates to an optical lens including seven lenses. Background technique [0002] As science and technology become more and more mature, emerging technologies such as unmanned driving will become more and more popular, and the imaging requirements for lenses will also become higher and higher. Especially for vehicle-mounted lenses, the resolution is gradually increasing towards 8M and 12M. [0003] In the prior art, high resolution can be obtained by increasing the number of lenses to 6-7 or more, but this will affect the realization of system miniaturization and low cost. The miniaturization requirements are usually met by controlling the total length of the lens, but the reduction of the total length will often lead to a shorter lens back focus, which will lead to insufficient space for optical components installation and focusing, resulting in mechanic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/00G02B13/18
Inventor 姜欢王东方姚波
Owner NINGBO SUNNY AUTOMOTIVE OPTECH