Optical Lenses and Imaging Equipment

A technology of optical lens and imaging surface, applied in the field of imaging lens, can solve the problems of weakening the shooting effect, not being able to clearly reflect the focus subject, narrowing the depth of field of the lens, etc., to achieve the effect of ensuring imaging quality, good imaging quality, and meeting the needs of use

Active Publication Date: 2022-07-29
JIANGXI LIANYI OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally, the Fno (aperture value) of a telephoto lens is about 3.0, and the leading Fno is 2.0. When shooting distant objects, because of its large depth of field, it often leads to the inability to clearly reflect the focus of the subject, and ultimately weakens the shooting effect. In order to effectively blur the background and focus on the subject, reducing the Fno of the lens and increasing the aperture of the lens to narrow the depth of field of the lens have become the development trend of portrait lenses

Method used

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  • Optical Lenses and Imaging Equipment
  • Optical Lenses and Imaging Equipment
  • Optical Lenses and Imaging Equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0087] see figure 1 , which is a schematic structural diagram of the optical lens 100 provided in the first embodiment of the present invention. The optical lens 100 sequentially includes from the object side to the imaging surface S15 along the optical axis: a diaphragm ST, a first lens L1, and a second lens L2 , the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the filter G1.

[0088] Wherein, the first lens L1 has positive refractive power, the object side S1 of the first lens is convex, and the image side S2 of the first lens is concave at the near optical axis;

[0089] The second lens L2 has positive refractive power, the object side S3 of the second lens is convex, and the image side S4 of the second lens is concave at the near optical axis;

[0090] The third lens L3 has negative refractive power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is concave;

[0091] The fourth lens L4 has negative r...

no. 2 example

[0104] see Figure 5 , which is a schematic structural diagram of the optical lens 200 provided in the second embodiment of the present invention. The optical lens 200 of this embodiment is substantially the same as the above-mentioned first embodiment, and the main difference is that the image side S2 of the first lens is Convex, the object side S9 of the fifth lens is concave at the near optical axis, the fourth lens L4 has positive refractive power, and the curvature radius, aspheric coefficient, thickness and material of each lens surface are different.

[0105] Specifically, the design parameters of the optical lens 200 provided in this embodiment are shown in Table 3.

[0106] table 3

[0107]

[0108] Table 4 shows the surface shape coefficients of each aspherical surface of the optical lens 200 in this embodiment.

[0109] Table 4

[0110]

[0111] Please refer to Image 6 , Figure 7 and Figure 8 , shown are the f-tanθ distortion curve, the field curvature ...

no. 3 example

[0113] like Figure 9 As shown, it is a schematic structural diagram of the optical lens 300 provided in this embodiment. The optical lens 300 of this embodiment is substantially the same as the above-mentioned first embodiment, except that the fourth lens L4 has a positive refractive power, and the fifth lens L5 has a positive refractive power. It has negative refractive power, the sixth lens L6 has positive refractive power, the image side S10 of the fifth lens is concave at the near optical axis, the object side S11 of the sixth lens is convex at the near optical axis, and each lens surface type The curvature radius, aspheric coefficient, thickness, and material are different.

[0114] Specifically, the design parameters of the optical lens 300 provided in this embodiment are shown in Table 5.

[0115] table 5

[0116]

[0117] Table 6 shows the surface shape coefficients of each aspherical surface of the optical lens 300 in this embodiment.

[0118] Table 6

[0119]...

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Abstract

The invention discloses an optical lens and an imaging device. The optical lens comprises in sequence from the object side to the imaging surface along the optical axis: a diaphragm; a first lens with positive refractive power, the object side of which is convex; The second lens, the object side is convex, the image side is concave at the near optical axis; the third lens with negative refractive power, the object side is convex, the image side is concave; the fourth lens with optical power, The object side surface is a concave surface; a fifth lens with optical power; a sixth lens with optical power; wherein, the first lens to the sixth lens include at least one aspherical lens. The optical lens has the advantages of long focal length, large aperture, short depth of field, high pixel and miniaturization.

Description

technical field [0001] The present invention relates to the technical field of imaging lenses, in particular to an optical lens and an imaging device. Background technique [0002] In recent years, with the rise of smartphones, the demand for differentiated shooting of flagship phones of major brands has been increasing day by day, and portrait lenses have also been born. Portrait lenses are generally telephoto lenses. Shorter depth of field and larger magnification can effectively blur the background and focus on the subject, and shoot more vivid portraits, so people often refer to telephoto lenses as portrait lenses. [0003] Generally, the Fno (aperture value) of a telephoto lens is around 3.0, and the leading Fno is 2.0. When shooting distant objects, due to its large depth of field, it often leads to inability to clearly reflect the focused subject, and ultimately weakens the shooting effect. In order to effectively blur the background and focus on the subject, reducin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/18
Inventor 章彬炜郑航鹏曾昊杰
Owner JIANGXI LIANYI OPTICS CO LTD
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