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Camera Optical Lens

An optical lens and optical total length technology, applied in the field of optical lenses, can solve the problems of insufficient ultra-thinning and wide-angle lens, insufficient lens shape setting, and inability to correct aberrations well.

Active Publication Date: 2020-11-13
CHANGZHOU RAYTECH OPTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The focal power allocation, lens spacing and lens shape settings of the existing structure are insufficient, resulting in insufficient ultra-thin lens and insufficient wide-angle lens
And rotationally symmetric aspheric surfaces do not correct aberrations well

Method used

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  • Camera Optical Lens
  • Camera Optical Lens
  • Camera Optical Lens

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example ）

[0053] Referring to the accompanying drawings, the present invention provides an imaging optical lens 10 . figure 1 Shown is the imaging optical lens 10 of the first embodiment of the present invention, and the imaging optical lens 10 includes eight lenses. Specifically, the imaging optical lens 10 includes in sequence from the object side to the image side: a first lens L1, a second lens L2, an aperture S1, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens Lens L6, seventh lens L7, and eighth lens L8. An optical element such as an optical filter (filter) GF may be disposed between the eighth lens L8 and the image plane Si.

[0054]In this embodiment, the first lens L1 is made of plastic material, the second lens L2 is made of plastic material, the third lens L3 is made of plastic material, the fourth lens L4 is made of plastic material, the fifth lens L5 is made of plastic material, and the sixth lens L6 is made of plastic material. are made of plastic, the s...

no. 2 approach ）

[0179] The second embodiment is basically the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0180] image 3 Shown is the imaging optical lens 20 according to the second embodiment of the present invention. In this embodiment, the object side surface of the fourth lens L4 is convex at the paraxial position.

[0181] Table 4, Table 5, and Table 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention. Wherein, the object side and the image side of the first lens L1 are free curved surfaces.

[0182] 【Table 4】

[0183]

[0184] Table 5 shows aspheric surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0185] 【table 5】

[0186]

[0187] Table 6 shows the free-form surface data in the imaging optical lens 20 according to the second embodiment of t...

no. 3 approach ）

[0194] The third embodiment is basically the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0195] Figure 5 Shown is the imaging optical lens 30 of the third embodiment of the present invention. In this embodiment, the image side of the first lens L1 is convex at the paraxial position, the third lens L3 has negative refractive power, and the image side of the third lens L3 is at The paraxial position is concave, and the object side surface of the fourth lens L4 is convex at the paraxial position.

[0196] Table 7, Table 8, and Table 9 show design data of the imaging optical lens 30 according to the third embodiment of the present invention. Wherein, the object side and the image side of the first lens L1 are free curved surfaces.

[0197] 【Table 7】

[0198]

[0199] Table 8 shows the aspheric surface data of each lens in the imaging optical lens 30 according to the...

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PUM

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Abstract

The present invention relates to the field of optical lenses, and discloses a photographic optical lens. The photographic optical lens comprises eight lenses in total, and the eight lenses are in order from the object side to the image side: lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens; at least one of the first lens to the eighth lens contains a free-form surface, and the focal length of the first lens is f1 , the focal length of the second lens is f2, the central radius of curvature of the object side of the fifth lens is R9, the central radius of curvature of the image side of the fifth lens is R10, and the following relationship is satisfied: -3.5≤f2 / f1≤‑1.5;‑2≤R9 / R10≤‑0.8. The imaging optical lens of the invention has good optical performance while having large aperture, ultra-thinning and widening angle.

Description

technical field [0001] The invention relates to the field of optical lenses, in particular to an imaging optical lens suitable for portable terminal devices such as smart phones and digital cameras, and imaging devices such as monitors and PC lenses. Background technique [0002] With the development of imaging lenses, people have higher and higher requirements for lens imaging, and the "night scene photography" and "background blur" of lenses have also become important indicators for measuring lens imaging standards. The focal power distribution of the existing structure, lens spacing and lens shape settings are insufficient, resulting in insufficient lens ultra-thinning and wide-angle. And rotationally symmetric aspheric surfaces cannot correct aberrations well. Freeform surface is a non-rotationally symmetrical surface type, which can better balance aberrations and improve imaging quality, and the processing of freeform surfaces has gradually matured. With the improveme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/18G02B13/06
CPCG02B13/0045G02B13/06G02B13/18G02B27/0012
Inventor 孙雯
Owner CHANGZHOU RAYTECH OPTRONICS CO LTD