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Optical imaging lens

An optical imaging lens and lens technology, applied in the lens field, can solve the problems of optical transfer function control to be improved, large optical distortion, imaging deformation, etc., and achieve the effects of good control of optical transfer function, small optical distortion, and short overall system length

Pending Publication Date: 2019-11-15
XIAMEN LEADING OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the DMS (Driver Monitoring System) monitoring lens currently on the market uses a large number of lenses, the total length is long, and the cost is high; the optical distortion is large, and the imaging deformation is serious; the aperture is small, and the imaging effect is relatively dark. Not good; the optical transfer function control needs to be improved when using near object distance, and the resolution is low; and it is only suitable for near-infrared light of more than 800 nanometers. When imaging, it will reflect the near-infrared light of the LED lamp, which will affect the driver's vision. Meet the increasing demands of consumers

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0061] Such as figure 1 As shown, an optical imaging lens includes a first lens 1, a second lens 2, a diaphragm 5, a third lens 3, a fourth lens 4, and a protective glass along an optical axis I from the object side A1 to the image side A2. 6 and an imaging surface 7; the first lens 1 to the fourth lens 4 each include an object side facing the object side A1 and allowing the imaging light to pass through and an image side facing the image side A2 and allowing the imaging light to pass through;

[0062] The first lens 1 has negative refractive power, the object side 11 of the first lens 1 is convex, and the image side 12 of the first lens 1 is concave.

[0063] The second lens 2 has positive refractive power, the object side 21 of the second lens 2 is convex, and the image side 22 of the second lens 2 is concave.

[0064] The third lens 3 has a negative refractive power, the object side 31 of the third lens 3 is concave, the image side 32 of the third lens 3 is convex, the obj...

Embodiment 2

[0089] Such as Figure 7 As shown, the concave-convex surface and refractive index of each lens in this embodiment are the same as those in the first embodiment, only the optical parameters of the curvature radius of each lens surface, lens thickness, lens aspheric coefficient and system focal length are different.

[0090] The detailed optical data of this specific embodiment are shown in Table 2-1.

[0091] Detailed optical data of Table 2-1 Example 2

[0092] surface Diameter (mm) Radius of curvature (mm) Thickness (mm) material Refractive index Dispersion coefficient focal length(mm) - subject surface 768.421 Infinity 650.000 11 first lens 5.025 12.363 0.470 H-QK3L 1.487 70.420 -8.770 12 4.127 3.102 0.783 21 second lens 3.785 3.166 1.261 H-ZLAF75A 1.904 31.318 4.332 22 3.105 15.411 0.466 5 aperture 2.328 Infinity 2.015 31 third lens 3.067 -1.0...

Embodiment 3

[0099] Such as Figure 13 As shown, the surface concave-convex and the refractive power of each lens in this embodiment are approximately the same as those in Embodiment 1, only the image side of the fourth lens 4 is a convex surface, and the radius of curvature, lens thickness, and lens aspheric coefficient of each lens surface are in addition And the optical parameters of the focal length of the system are also different.

[0100] The detailed optical data of this specific embodiment are shown in Table 3-1.

[0101] Detailed optical data of the third embodiment of table 3-1

[0102]

[0103]

[0104] Please refer to the following table for the detailed data of the parameters of each aspheric surface in this specific embodiment:

[0105] surface 31 32 41 42 K＝ -2.2086E+00 -1.5512E+00 -1.3984E+01 9.4235E+01 a 4 ＝

-8.3301E-02 -7.2285E-03 -6.4244E-05 -8.6349E-03 a 6 ＝

1.3222E-03 -9.4361E-03 2.0053E-04 1.0059E-03 a 8 ＝

3.50...

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Abstract

The invention relates to the technical field of lenses, in particular to an optical imaging lens. The optical imaging lens comprises a first lens, a second lens, a third lens and a fourth lensalong anoptical axis from an object side to an image side sequentially, wherein the first lens is a meniscus lenswith negative refractive index; the second lens is a meniscus lens with positive refractive power; the third lens is ameniscus lens with negative refractive power, and the object side surface and the image side surface of the third lens are aspheric surfaces; the fourth lens has positive refractive index, the object side surface of the fourth lens is convex, and the object side surface and the image side surface of the fourth lens are aspheric; the third lens and the fourth lens are both made of a plastic material. The optical imaging lens has the advantages of total optical length, low cost, large aperture, low distortion and high resolution when used at close object distance.

Description

technical field [0001] The invention belongs to the technical field of lenses, and in particular relates to an optical imaging lens. Background technique [0002] With the continuous advancement of technology, optical imaging lenses have also developed rapidly in recent years, and are widely used in various fields such as smart phones, tablet computers, video conferencing, security monitoring, and vehicle monitoring. Therefore, the requirements for optical imaging lenses Also getting higher and higher. However, the DMS (Driver Monitoring System) monitoring lens currently on the market uses a large number of lenses, the total length is long, and the cost is high; the optical distortion is large, and the imaging deformation is serious; the aperture is small, and the imaging effect is relatively dark. Not good; the optical transfer function control needs to be improved when using near object distance, and the resolution is low; and it is only suitable for near-infrared light o...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18G02B13/14G02B1/04
CPCG02B13/004G02B13/008G02B13/18G02B13/14G02B1/041
Inventor 张军光王世昌黄波
Owner XIAMEN LEADING OPTICS
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