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Pickup lens group

A camera lens and lens technology, applied in the field of camera lens groups, can solve the problems of increased lens difficulty, large distortion, and unfavorable clear imaging, and achieve the effect of improving image quality.

Pending Publication Date: 2019-04-12
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, smaller size, larger field of view, and better imaging quality are required while increasing the light throughput of the lens. These conditions are usually contradictory, which increases the difficulty of lens design.
In addition, wide-angle lenses usually have large aberrations, especially the defect of too much distortion, which is not conducive to the need for clear imaging

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Refer to the following figure 1 and figure 2 An imaging lens group according to Embodiment 1 of the present application will be described. figure 1 A schematic structural diagram of the camera lens group according to Embodiment 1 of the present application is shown.

[0073] Such as figure 1 As shown, the camera lens group includes in sequence from the object side to the image side along the optical axis: the first lens E1, the second lens E2, the third lens E3, the diaphragm STO, the fourth lens E4, the fifth lens E5, the filter Slice E6 and imaging surface S13.

[0074] The first lens E1 has negative 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 positive refractive power, its objec...

Embodiment 2

[0091] Refer to the following image 3 and Figure 4 An imaging lens group according to Embodiment 2 of the present application will be 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 the camera lens group according to Embodiment 2 of the present application is shown.

[0092] Such as image 3 As shown, the camera lens group includes in sequence from the object side to the image side along the optical axis: the first lens E1, the second lens E2, the third lens E3, the diaphragm STO, the fourth lens E4, the fifth lens E5, the filter Slice E6 and imaging surface S13.

[0093] The first lens E1 has negative 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 re...

Embodiment 3

[0103] Refer to the following Figure 5 and Figure 6 An imaging lens group according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of a camera lens group according to Embodiment 3 of the present application is shown.

[0104] Such as Figure 5 As shown, the camera lens group includes in sequence from the object side to the image side along the optical axis: the first lens E1, the second lens E2, the third lens E3, the diaphragm STO, the fourth lens E4, the fifth lens E5, the filter Slice E6 and imaging surface S13.

[0105] The first lens E1 has negative 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 positive refractive power, its object si...

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Abstract

The invention discloses a pickup lens group, which comprises a first lens with focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with positivefocal power, and a fifth lens with negative focal power along an optical axis from an object side to an image side, wherein the image side surface of the second lens is a concave surface; the image side surface of the fourth lens is a convex surface; an air interval is formed between any two adjacent lenses in the first lens to the fifth lens; and at least one lens in the first lens to the fifthlens is provided with an irrotationally-symmetric aspheric surface. The effective focal length fx of the X-axis direction of the pickup lens group and the effective focal length fy of the Y-axis direction of the pickup lens group meet a condition that fx / fy is greater than 0.90 and less than 1.25.

Description

technical field [0001] The present application relates to a camera lens group, and more particularly, to a camera lens group including five lenses and having a free-form surface. Background technique [0002] In recent years, with the rapid development of portable electronic products and the trend of increasing the total number of pixels and reducing the pixel size of image sensors such as complementary metal oxide semiconductor devices (CMOS) and photosensitive coupling devices (CCD), the matching camera Lenses put forward higher and higher requirements. Some portable electronic products require the camera lens to have a large field of view to capture a wider scene, and require an ultra-wide-angle lens with a field of view of 150° and above and capable of clear imaging. [0003] However, while increasing the light throughput of the lens, smaller size, larger field of view and better imaging quality are required. These conditions are usually contradictory, which increases t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/06G02B13/18G02B7/09G02B9/60G02B9/64G02B13/009
Inventor 钟旭森吕赛锋戴付建赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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