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Imaging lens

A technology of imaging lens and imaging surface, which is applied in the field of imaging lens, can solve problems such as the development limitation of five-piece lens, and achieve the effect of image quality improvement

Pending Publication Date: 2019-03-12
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the surface type of the lens (aspherical surface), the development of the five-element lens is limited

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0082] Refer to the following figure 1 and figure 2 An imaging lens according to Embodiment 1 of the present application is described. figure 1 A schematic structural diagram of an imaging lens according to Embodiment 1 of the present application is shown.

[0083] like figure 1 As shown, the imaging lens according to the exemplary embodiment of the present application includes sequentially along the optical axis from the object side to the image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, The fifth lens E5, the filter E6 and the imaging surface S13.

[0084] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is convex. The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has positive refractive power, its object side S5 is concave, and its image side S6 is convex. The fourth lens E4 has positive ref...

Embodiment 2

[0129] Refer to the following image 3 and Figure 4 An imaging lens according to Embodiment 2 of the present application is described. image 3 A schematic structural diagram of an imaging lens according to Embodiment 2 of the present application is shown.

[0130] Such as image 3 As shown, the imaging lens according to the exemplary embodiment of the present application includes sequentially along the optical axis from the object side to the image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, The fifth lens E5, the filter E6 and the imaging surface S13.

[0131] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has negative refractive power, its object side S3 is concave, and its image side S4 is concave. The third lens E3 has positive refractive power, its object side S5 is concave, and its image side S6 is convex. The fourth lens E4 has positiv...

Embodiment 3

[0154] Refer to the following Figure 5 and Figure 6 An imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of an imaging lens according to Embodiment 3 of the present application is shown.

[0155] Such as Figure 5 As shown, the imaging lens according to the exemplary embodiment of the present application includes sequentially along the optical axis from the object side to the image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, The fifth lens E5, the filter E6 and the imaging surface S13.

[0156] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has positive refractive power, its object side S5 is convex, and its image side S6 is convex. The fourth lens E4 has positi...

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Abstract

The invention discloses an imaging lens. The lens includes, in order from an object side to an image side in the optical axis, a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The first lens has a positive optical power, and the object side is a convex surface; the second lens has an optical power, and the image side is a concave surface; the third lens has an optical power, and the image side is a convex surface; the fourth lens has a positive optical power, and the image side is a convex surface; the fifth lens has a negative optical power, and the image side is a concave surface; at least one of the first to fifth lenses has a non-rotationally symmetric aspherical surface.

Description

technical field [0001] The present application relates to an imaging lens, and more particularly, to an imaging lens including five lenses. Background technique [0002] At present, the molding technology and assembly process of the five-piece lens are very mature and widely used. However, limited by the surface type of the lens (aspheric surface), the development of the five-element lens is limited. Without increasing the number of components, in order to improve the imaging quality of the system, more degrees of freedom must be added. Freeform surfaces can meet this requirement. The freeform surface is a non-rotationally symmetrical surface type, which includes two degrees of freedom in the X direction and the Y direction, which can be used to improve the image quality in the s direction and the t direction, and can be used to correct TV distortion. Considering the relatively mature molding technology of free-form surfaces, lenses with free-form surfaces will be a trend...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/06G02B13/18
Inventor 张晓彬胡亚斌闻人建科戴付建赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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