3.2mm high-definition ultra-wide-angle lens and working method thereof

Abstract

The invention relates to a 3.2mm high-definition ultra-wide-angle lens, wherein a front group A with negative focal power, a diaphragm STO and a rear group B with positive focal power are sequentiallyarranged in an optical system of the lens in the incident direction of light rays from front to back; the front group A comprises a negative meniscus lens A and a plano-convex lens A which are sequentially arranged from front to back, and the rear group B comprises a gluing group which are sequentially arranged from front to back, wherein the gluing group is formed by closely connecting a positive meniscus lens B, a biconvex lens B and a negative meniscus lens B. The invention also relates to a working method of the 3.2mm high-definition ultra-wide-angle lens. The 3.2mm high-definition ultra-wide-angle lens has the advantages of large visual field angle of 120 degrees horizontally, high-definition image quality, simplified optical structure, low cost and the like, clear pictures can be kept in the temperature range of minus 40 DEG C to 85 DEG C, and the occasions such as vehicle-mounted driving monitoring, reverse monitoring and the like can be applied.

Description

technical field [0001] The invention relates to a 3.2mm high-definition ultra-wide-angle lens and a working method thereof. Background technique [0002] In the early market, there were various wide-angle fixed-focus lenses used in vehicle systems. However, the horizontal angle of many products is between 90°-110°, which can no longer meet the requirements of multi-lane monitoring range; secondly, the lens aperture is not enough Large, directly lead to obvious image noise at night, poor night imaging effect, and it is difficult to correct the edge aberration and advanced spherical aberration, resulting in a significant drop in edge image quality; finally, the current operating temperature range of the vehicle lens requires -40 ~ +85 ℃, Compared with the previous ones, the requirements are higher, and the imaging quality of the early lenses drops significantly under the extreme temperature. Contents of the invention [0003] In view of this, the object of the present inven...

AI Technical Summary

Problems solved by technology

[0002] In the early market, there were various wide-angle fixed-focus lenses used in vehicle systems. However, the horizontal angle of many products is between 90°-110°, which can no longer meet the requirements of multi-lane monitoring range; secondly, the lens aperture is not enough Large, directly lead to obvious image noise at night, poor night imaging effect, and it is difficult to correct the edge aberration and advanced spherical aberration, resulting in a significant drop in edge image quality; finally, the current operating temperature range of the vehicle lens requires -40 ~ +85 ℃, The requirements are higher than before, and the image quality of the early lenses drops significantly under the extreme temperature

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