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Pick-up lens

A camera lens and lens technology, applied in the field of camera lens, can solve the problem of the lens being not portable, and achieve the effect of short overall length of the lens, easy portability and good image quality

Active Publication Date: 2014-02-12
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a camera lens, which solves the disadvantages of high pixel and good imaging quality but the lens is not portable, and can be applied to portable electronic products. The technical solution is as follows:

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The parameters of the camera lens in Example 1 are as follows: TTL=3.801; f1=2.278; f2=-4.565; f3=∞; f4=3.377; f5=-614.01; f6=-2.896; f=3.151;

[0036] Also satisfy: f4 / CT4=5.496; f2 / f4=-1.352; Yc41 / SD41=0.66,

[0037] Wherein, f4 is the focal length of the fourth lens; CT4 is the central thickness of the fourth lens on the optical axis; f2 is the focal length of the second lens; Yc41 is the inflection point on the object side surface of the fourth lens and the perpendicular to the optical axis distance; SD41 is the effective radius of the object-side surface of the fourth lens.

[0038] System parameters: 1 / 4" photosensitive device aperture value 2.4

[0039] Table 1

[0040] surface type Radius of curvature thickness Material Effective diameter Conic factor spherical endless endless Aspherical 1.3036 0.5725 1.544,56.11 1.8221 -0.2490 Aspherical -23.3857 0.0300 1.5191 -50.0000 spherical endless 0.03...

Embodiment 2

[0046] The parameters of the camera lens in Example 2 are as follows: TTL=3.81; f1=2.257; f2=-4.235; f3=136.48; f4=3.141; f5=-31.011; f6=-2.849; f=3.183;

[0047] Also satisfy: f4 / CT4=4.515; f2 / f4=-1.39; Yc41 / SD41=0.53,

[0048] Wherein, f4 is the focal length of the fourth lens; CT4 is the central thickness of the fourth lens on the optical axis; f2 is the focal length of the second lens; Yc41 is the inflection point on the object side surface of the fourth lens and the perpendicular to the optical axis distance; SD41 is the effective radius of the object-side surface of the fourth lens.

[0049] System parameters: 1 / 4" photosensitive device aperture value 1.9

[0050] table 3

[0051] surface type Radius of curvature thickness Material Effective diameter Conic factor spherical endless endless Aspherical 1.2427 0.4510 1.54,56.11 1.3264 0.2027 Aspherical -146.6670 0.0428 1.3438 -50.0000 Aspherical -102.8932 ...

Embodiment 3

[0058] The parameters of the camera lens in Example 3 are as follows: TTL=3.801; f1=2.471; f2=-3.321; f3=6.401; f4=3.418; f5=-85.018; f6=-2.796; f=3.117;

[0059] Also satisfy: f4 / CT4=4.986; f2 / f4=-0.972; Yc41 / SD41=0.672,

[0060] Wherein, f4 is the focal length of the fourth lens; CT4 is the central thickness of the fourth lens on the optical axis; f2 is the focal length of the second lens; Yc41 is the inflection point on the object side surface of the fourth lens and the perpendicular to the optical axis distance; SD41 is the effective radius of the object-side surface of the fourth lens.

[0061] System parameters: 1 / 4" photosensitive device aperture value 1.9

[0062] table 5

[0063]

[0064]

[0065] The following table is the aspheric high-order coefficients A4, A6, A8, A10, A12 of the aspheric lens,

[0066] Table 6

[0067]

[0068] figure 2 , image 3 , Figure 4 and Figure 5 are the on-axis chromatic aberration diagram, astigmatism diagram, disto...

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Abstract

The invention provides a pick-up lens which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from object space to image space. The first lens has positive focal power, and the object side surface of the first lens is a convex surface; the second lens has negative focal power, and the image side surface of the second lens is a concave surface; the fourth lens has positive focal power, and the image side surface of the fourth lens is a convex surface; the image side surface of the fifth lens is a concave surface, and at least one point of inflexion is formed in the surface of the object side of the fifth lens or the surface of the image side of the fifth lens; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface. According to the pick-up lens, the six plastic aspherical lenses are adopted, so that the defects in the prior art are overcome through different types of focal power distribution; the pick-up lens has the advantages that the resolution is high, imaging quality is good, the total length of the pick-up lens is small, and the pick-up lens is convenient to carry; the pick-up lens provides a novel solution to meet current specification requirements and performance requirements.

Description

technical field [0001] The invention relates to an imaging optical system of a lens, in particular to an imaging lens composed of six groups of lenses. Background technique [0002] In recent years, with the development of chip technology such as CCD or CMOS, the pixel size of the chip is getting smaller and smaller, and the requirements for the imaging quality of the corresponding optical system are getting higher and higher. The size of the optical lens is getting smaller and smaller, which makes the camera lens develop rapidly in the field of miniaturization and high pixel. At present, the general high-pixel thin lens mainly adopts a five-piece lens structure, as shown in the US Patent No. "US8369027", but due to the increasing development of portable electronic products, the pixels and imaging of miniaturized photographic lenses are The quality requirements are further improved, and the known optical systems will not be able to meet the higher photographic needs. There...

Claims

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Application Information

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IPC IPC(8): G02B13/18
Inventor 戴付建黄林
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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