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Ultra-wide-angle optical lens

An optical lens and ultra-wide-angle technology, applied in the field of optical lenses, can solve the problems of large optical lens distortion, long optical lens, large volume, etc., and achieve the effect of satisfying F-theta distortion, small F-theta distortion, and stable temperature performance.

Pending Publication Date: 2021-12-31
辽宁中蓝光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of electronic products, the wide-angle performance of optical lenses is becoming more and more important, but the distortion of wide-angle optical lenses exceeding 120° will become larger and larger, which will affect the image quality
The cemented lens can often meet the characteristics of ultra-wide angle and small F-theta distortion, but the total length of the cemented lens is usually large, which leads to the overall length and volume of the optical lens

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Refer to the following figure 1 , Figure 2A to Figure 2D An optical lens according to Embodiment 1 of the present invention will be described. figure 1 A schematic structural view of the optical lens according to Embodiment 1 of the present invention is shown.

[0051] Such as figure 1 As shown, the optical lens according to the exemplary embodiment of the present invention includes in sequence from the object side to the image side along the optical axis: a first lens 1, a second lens 2, a diaphragm 6, a third lens 3, a fourth lens 4, The fifth lens 5, the filter 6 and the imaging surface S14.

[0052] The first lens 1 is a glass lens with negative refractive power, its object side S1 is convex, and its image side S2 is concave; the second lens 2 is an aspheric plastic lens with positive refractive power, its object side S3 is concave, and its image is concave. The side surface S4 is a convex surface; the third lens 3 is an aspheric glass lens with positive refrac...

Embodiment 2

[0073] Refer to the following image 3 , Figure 4A to Figure 4D An optical lens according to Embodiment 2 of the present invention will be described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. image 3 A schematic structural diagram of an optical lens according to Embodiment 2 of the present invention is shown.

[0074] Such as image 3 As shown, the optical lens according to the exemplary embodiment of the present invention includes in sequence from the object side to the image side along the optical axis: a first lens 1, a second lens 2, a diaphragm 6, a third lens 3, a fourth lens 4, The fifth lens 5, the filter 7 and the imaging surface S14.

[0075] Among them, the first lens 1 is a glass lens with negative refractive power, its object side S1 is convex, and its image side S2 is concave; the second lens 2 is an aspheric plastic lens with positive refractive power, its objec...

Embodiment 3

[0093] Refer to the following Figure 5 , Figure 6A to Figure 6D An optical lens according to Embodiment 3 of the present invention will be described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. Figure 5 A schematic structural diagram of an optical lens according to Embodiment 3 of the present invention is shown.

[0094] Such as Figure 5 As shown, the optical lens according to the exemplary embodiment of the present invention includes in sequence from the object side to the image side along the optical axis: a first lens 1, a second lens 2, a diaphragm 6, a third lens 3, a fourth lens 4, The fifth lens 5, the filter 7 and the imaging surface S14.

[0095] The first lens 1 is a glass lens with negative refractive power, the object side S1 is convex, and the image side S2 is concave; the second lens 2 is an aspheric plastic lens with positive refractive power, and the object sid...

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PUM

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Abstract

The invention relates to the technical field of optical lenses, in particular to an ultra-wide-angle optical lens. The ultra-wide-angle optical lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side, wherein the first lens is a negative-focal-power spherical glass lens, the object side surface of the first lens is a convex surface, and the image side surface is a concave surface; the second lens is a positive-focal-power aspherical plastic lens, and the part, close to the optical axis, of the image side surface of the second lens is a convex surface; the third lens is a positive-focal-power aspherical glass lens, and the object side surface and the image side surface of the third lens are convex surfaces; the fourth lens is a negative-focal-power aspheric plastic lens, the paraxial part of the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface; the fifth lens is a positive-focal-power aspherical plastic lens, and the object side surface of the fifth lens is a convex surface; the third lens meets the following relations: 1.7 > Nd > 1.6, 65 > Vd > 40, Nd being the refractive index of the lens, and Vd being the Abbe constant of the lens. According to the invention, the requirements of ultra-wide angle, high resolution and miniaturization can be met, and the requirements of small F-theta distortion and relatively stable temperature performance can be met at the same time.

Description

technical field [0001] The invention relates to the technical field of optical lenses, in particular to an ultra-wide-angle optical lens. Background technique [0002] With the continuous development of electronic products, the wide-angle of the optical lens is more and more important, but the distortion of the wide-angle optical lens after exceeding 120° will become larger and larger, which will affect the image quality. A cemented lens can often meet the characteristics of ultra-wide angle and small F-theta distortion, but the total length of the cemented lens is usually large, which leads to the overall length and volume of the optical lens being too large. Contents of the invention [0003] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an ultra-wide-angle optical lens, which not only satisfies the ultra-wide-angle but also satisfies the characteristics of short total optical length, small F-theta distortio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18G02B1/00G02B1/04
CPCG02B13/0045G02B13/06G02B13/18G02B1/00G02B1/041
Inventor 王春燕金兑映
Owner 辽宁中蓝光电科技有限公司