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Optical lens

An optical lens and lens technology, applied in the field of optical lens, can solve the problems of insufficient resolution, small field of view, small aperture, etc., and achieve the effect of high imaging quality, large field of view, and high definition

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

AI Technical Summary

Problems solved by technology

Although the existing wide-angle vehicle-mounted lenses can basically meet the basic needs of large-field-of-view vehicle-mounted lenses, there are still many defects, such as small field of view, too small aperture, insufficient resolution, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] see figure 1 , which is a schematic structural diagram of the optical lens provided in Embodiment 1 of the present invention, the optical lens sequentially includes from the object side to the imaging plane along the optical axis: a first lens L1, a second lens L2, a third lens L3, a diaphragm ST, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the filter G1 and the protective glass G2.

[0116] The first lens L1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave;

[0117] The second lens L2 has negative refractive power, the object side S3 is concave, and the image side S4 is convex;

[0118] The third lens L3 has positive refractive power, the object side S5 is convex, and the image side S6 is concave;

[0119] aperture ST;

[0120] The fourth lens L4 has a positive refractive power, the object side surface S7 is a convex surface, and the image side surface S8 is a concave...

Embodiment 2

[0143] see Figure 8 , which is a schematic structural diagram of the optical lens provided in Embodiment 2 of the present invention. The optical lens sequentially includes from the object side to the imaging plane along the optical axis: a first lens L1, a second lens L2, a third lens L3, a diaphragm ST, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the filter G1 and the protective glass G2.

[0144] The first lens L1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave;

[0145] The second lens L2 has negative refractive power, the object side S3 is concave, and the image side S4 is convex;

[0146] The third lens L3 has a positive refractive power, and both the object side S5 and the image side S6 are convex;

[0147] aperture ST;

[0148] The fourth lens L4 has positive refractive power, the object side S7 is convex, and the image side S8 is concave;

[0149] The fifth lens L5...

Embodiment 3

[0168] see Figure 15 , which is a schematic structural diagram of the optical lens provided in Embodiment 3 of the present invention. The optical lens sequentially includes from the object side to the imaging plane along the optical axis: a first lens L1, a second lens L2, a third lens L3, a diaphragm ST, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the filter G1 and the protective glass G2.

[0169] The first lens L1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave;

[0170] The second lens L2 has negative refractive power, the object side S3 is concave, and the image side S4 is convex;

[0171] The third lens L3 has positive refractive power, the object side S5 is convex, and the image side S6 is concave;

[0172] aperture ST;

[0173] The fourth lens L4 has a positive refractive power, and both the object side surface S7 and the image side surface S8 are convex surfaces; ...

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Abstract

The invention provides an optical lens, which comprises eight lenses in sequence from an object side to an imaging surface along an optical axis: a first lens with negative focal power, a second lens with negative focal power, a third lens with positive 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; the object side surface of the third lens is a convex surface; a diaphragm; the fourth lens has positive focal power, and the object side surface of the fourth lens is a convex surface; the fifth lens has positive focal power, and the object side surface and the image side surface of the fifth lens are convex surfaces; the sixth lens has positive focal power, and the object side surface and the image side surface of the sixth lens are convex surfaces; the seventh lens has negative focal power, and the object side surface of the seventh lens is a concave surface; the object side surface of the eighth lens is a convex surface, and the image side surface of the eighth lens is a concave surface; and the optical total length TTL and the effective focal length f of the optical lens meet the condition that TTL / f is less than 6.5. The optical lens has the advantages of large field angle, large aperture, high definition and high imaging quality.

Description

technical field [0001] The present invention relates to the technical field of imaging lenses, in particular to an optical lens. Background technique [0002] With the rapid development of advanced driver assistance systems (ADAS), vehicle cameras have a wider range of applications and development. These include dash cams, automatic parking, forward collision warning (FCW), lane departure warning (LDW), pedestrian detection warning (PCW), and more. Although the existing wide-angle vehicle lens can basically meet the basic needs of the large field of view vehicle lens, there are still many defects, such as small field of view, too small aperture, insufficient resolution and so on. SUMMARY OF THE INVENTION [0003] In view of the above problems, the purpose of the present invention is to provide an optical lens, which has the advantages of large angle of view, large aperture, high definition and high imaging quality. [0004] For achieving the above object, technical schem...

Claims

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Application Information

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IPC IPC(8): G02B13/06G02B13/18
CPCG02B13/0045G02B13/06
Inventor 吴永杰魏文哲王克民
Owner JIANGXI LIANCHUANG ELECTRONICS CO LTD
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