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Large-aperture low-sensitiveness optical lens assembly

A technology of optical lenses and lens components, applied in the field of optical lenses, can solve the problems of high-pixel lens quality, low production yield, etc., achieve the effect of optical total length, improve resolution and illumination, field curvature and magnification chromatic aberration correction

Inactive Publication Date: 2015-04-29
GUANGDONG XUYE OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing lenses are mostly made of plastic, and some manufacturing defects and alignment errors in the actual production process can easily affect the quality of high-pixel lenses, resulting in low production yield

Method used

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  • Large-aperture low-sensitiveness optical lens assembly
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  • Large-aperture low-sensitiveness optical lens assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] refer to figure 1 , the large-aperture low-sensitivity optical lens assembly of the present invention is composed of four plastic (resin) aspherical lenses, including a first lens 1, a second lens 2, and a lens arranged in sequence from the object side to the imaging side. The third lens 3 , the fourth lens 4 , the optical filter 5 , and the aperture 6 , wherein the aperture 6 is arranged on the object side of the first lens 1 , and adopts the way of the aperture in front. The first lens 1 has positive refractive power, and the image side is convex; the second lens 2 has negative refractive power, and the object side is concave; the third lens 3 has an aspheric surface and has positive refractive power; the fourth lens 4 has an object side It is a concave surface, and both the object side and the image side are aspherical.

[0032] Wherein, the lens assembly, the first lens 1, the second lens 2, the third lens 3, and the fourth lens 4 satisfy the following relational e...

Embodiment 2

[0042] refer to Figure 4 , different from Embodiment 1, in the large-aperture low-sensitivity optical lens assembly, the lens assembly, the first lens 1, the second lens 2, the third lens 3, and the fourth lens 4 satisfy the following relationship:

[0043] 0.350, Vd2<30; 0.1

[0044] Wherein, F is the focal length of the lens assembly; F1 is the focal length of the first lens 1; D2 is the thickness of the second lens 2 on the optical axis; D3 is the thickness of the third lens 3 on the optical axis; R1 is the first lens 1 The radius of curvature of the surface on the object side; R2 is the radius of curvature of the surface of the image side of the first lens 1; R3 is the radius of curvature of the surface of the second lens 2 on the object side; R4 is the radius of curvature of the surface of the second lens 2 on the image side; R7 is the radius of curvature of the surface of the second lens 2 on the image side; The radius of curvature of the four-lens 4 object...

Embodiment 3

[0053] refer to Figure 7 , different from Embodiment 2, in the aspheric formula of the large aperture and low sensitivity optical lens assembly, the specific data of each parameter is shown in Table 3 (F=3.21mm, FNO=2.2, FOV=75.2°)

[0054] Table 3 Data sheet of each lens of the lens assembly

[0055]

[0056] According to the above parameters, the field curvature and distortion curve of the lens assembly, refer to Figure 8 ;Spherical aberration curve reference Figure 9 . Depend on Figure 8 It can be seen that the optical distortion of the lens assembly is less than 1.5%, the field curvature is less than 0.1mm, and the distortion of the imaging picture is small and the definition is high.

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Abstract

The invention relates to a large-aperture low-sensitiveness optical lens assembly which comprises a first lens, a second lens, a third lens and a fourth lens. The first lens is provided with positive light focal power, and the image side face of the first lens is a convex face. The second lens is provided with negative light focal power, and the object side face of the second lens is a concave face. The third lens is provided with an aspheric face and positive light focal power. The object side face of the fourth lens is a concave face, and the object side and the image side face are aspheric faces. The lens assembly meets the following relational expression: 0.3<F1 / TLT<1.0, 0.7<F / TTL<1.3, and D3 / D2<3. By means of the structure, when specific conditions are met, the lens assembly is beneficial for reducing the sensitivity of a system, promotes periphery resolution and illuminance, and improves the imaging effect.

Description

technical field [0001] The invention relates to the technical field of optical lenses, in particular to a large aperture low-sensitivity optical lens assembly. Background technique [0002] Today, with the rapid development of science and technology, the mobile phone, as a portable communication tool, is not limited to its basic call function, and the camera and photography function has become one of the important indicators for evaluating the overall performance of a mobile phone. Since the domestic 8-megapixel mobile phone lens was developed and produced in 2010, the lens structure composed of four aspheric resin lenses has become the mainstream of the market. Compared with the immature 13-megapixel lens, the 8-megapixel lens has more mature imaging technology and higher cost performance. [0003] Existing lenses are mostly made of plastic, and some manufacturing defects and alignment errors in the actual production process can easily affect the quality of high-pixel lens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18G02B13/06G02B13/00G02B1/04
CPCG02B1/041G02B13/0015G02B13/002G02B13/004
Inventor 林肖怡刘勇袁正超
Owner GUANGDONG XUYE OPTOELECTRONICS TECH
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