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Optical lens

An optical lens and lens technology, applied in the field of optical lenses, can solve the problems of small aperture, small image area, difficult aberration correction, etc., and achieve the effect of large aperture, large field of view, and high resolution.

Active Publication Date: 2022-04-29
JIANGXI LIANCHUANG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are still many problems with ultra-wide-angle lenses. For example, the aperture of common ultra-wide-angle lenses is small, which will cause insufficient light intake and unclear imaging. In addition, it is difficult to correct aberrations, and the image surface is generally small, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] see figure 1 , which is a schematic diagram of the structure of the optical lens provided in Embodiment 1 of the present invention. The optical lens includes in sequence from the object side to the imaging surface along the optical axis: a first lens L1, a second lens L2, a stop ST, and a third lens L3, the fourth lens L4, the fifth lens L5 and the filter G1.

[0079] The first lens L1 has negative refractive power, its object side S1 is convex, and its image side S2 is concave;

[0080] The second lens L2 has positive refractive power, its object side S3 is concave, and its image side S4 is convex;

[0081] Aperture ST;

[0082] The third lens L3 has negative refractive power, its object side S5 is convex, and its image side S6 is concave;

[0083] The fourth lens L4 has positive refractive power, and its object side S7 and image side S8 are both convex;

[0084] The fifth lens L5 has negative refractive power, its object side S9 is convex, and its image side S10 i...

Embodiment 2

[0101] see Figure 7 , which is a schematic diagram of the structure of the optical lens provided in Embodiment 2 of the present invention, the optical lens includes in sequence from the object side to the imaging surface along the optical axis: a first lens L1, a second lens L2, a third lens L3, a diaphragm ST, fourth lens L4, fifth lens L5 and filter G1.

[0102] The first lens L1 has negative refractive power, its object side S1 is convex, and its image side S2 is concave;

[0103] The second lens L2 has positive refractive power, its object side S3 is concave, and its image side S4 is convex;

[0104] The third lens L3 has a negative refractive power, and its object side S5 and image side S6 are both concave;

[0105] Aperture ST;

[0106] The fourth lens L4 has positive refractive power, and its object side S7 and image side S8 are both convex;

[0107] The fifth lens L5 has negative refractive power, its object side S9 is convex, and its image side S10 is concave.

...

Embodiment 3

[0121] see Figure 13 , which is a schematic diagram of the structure of the optical lens provided in Embodiment 3 of the present invention, the optical lens includes in sequence from the object side to the imaging surface along the optical axis: a first lens L1, a second lens L2, a third lens L3, a diaphragm ST, fourth lens L4, fifth lens L5 and filter G1.

[0122] The first lens L1 has negative refractive power, its object side S1 is convex, and its image side S2 is concave;

[0123] The second lens L2 has positive refractive power, its object side S3 is concave, and its image side S4 is convex;

[0124] The third lens L3 has a negative refractive power, its object side S5 is concave, and its image side S6 is convex;

[0125] Aperture ST;

[0126] The fourth lens L4 has positive refractive power, and its object side S7 and image side S8 are both convex;

[0127] The fifth lens L5 has negative refractive power, its object side S9 is convex, and its image side S10 is conca...

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Abstract

The invention provides an optical lens which comprises five lenses which are sequentially arranged from an object side to an imaging surface along an optical axis as follows: a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power and a fifth lens with negative focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens has negative focal power; the object side surface and the image side surface of the fourth lens are convex surfaces; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the field angle FOV and the aperture value FNO of the optical lens meet the following condition: FOV / FNO is more than 120 degrees and less than 150 degrees. The optical lens has the advantages of large field angle, large aperture and high resolution.

Description

technical field [0001] The invention relates to the technical field of imaging lenses, in particular to an optical lens. Background technique [0002] With the rapid development of drones, security, automobiles, meteorology, medical care and other fields, higher and higher requirements are placed on the field of view of the lenses equipped on them. The wide-angle lens compresses the light at the edge of the field of view as much as possible by introducing barrel distortion, thereby realizing an ultra-wide-angle lens with a field of view exceeding 180°. At present, there are still many problems with ultra-wide-angle lenses. For example, the small aperture of common ultra-wide-angle lenses will cause insufficient light intake and unclear imaging. In addition, it is difficult to correct aberrations, and the image surface is generally small. Contents of the invention [0003] In view of the above problems, the purpose of the present invention is to provide an optical lens wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/06G02B13/18
CPCG02B13/0045G02B13/06
Inventor 陈星星陈伟建王克民曾吉勇
Owner JIANGXI LIANCHUANG ELECTRONICS CO LTD
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