Optical Compensation Zoom Lens

Abstract

An optical compensation zoom lens, including a compensation lens group and a zoom lens group, the focal length change of the entire lens is adjusted by changing the relative position of the compensation lens group and the zoom lens group, and the compensation lens group includes objects arranged on one side The first lens is a convex-concave negative power lens, the second lens is a double-concave negative power lens, and the third lens is a double-convex positive power lens; The lens is a double-convex positive power lens, the fifth lens is a concave-convex negative power lens, the sixth lens is a double-convex positive angle lens, the seventh lens is a convex-convex negative power lens, and the eighth lens is a double The convex positive refractive power lens and the ninth lens are concave-convex negative refractive power lenses. The optical compensation zoom lens of the present invention realizes confocal imaging of visible light and imaging of infrared light through the structure and parameter setting of each lens.

Description

technical field [0001] The invention belongs to the field of optoelectronic integration and relates to an optical compensation zoom lens. Background technique [0002] With the continuous improvement of security awareness and automation, night monitoring is becoming more and more important. Ordinary surveillance lenses are mainly designed for daytime visible light conditions, and people can meet the requirements as long as they can see the surveillance target under visible light conditions. However, in some monitoring occasions, only infrared light invisible to human eyes can be equipped at night. Since infrared light and visible light have different wavelengths, and ordinary lenses are not designed with infrared light in mind, the image plane positions they image will have Migration, infrared defocus, the phenomenon shown is that the image is blurred and the image quality is poor under the infrared light condition. In addition, due to the large temperature difference betw...

AI Technical Summary

Problems solved by technology

However, in some monitoring occasions, only infrared light invisible to human eyes can be equipped at night. Since infrared light and visible light have different wavelengths, and ordinary lenses are not designed with infrared light in mind, the image plane positions they image will have Offset, infrared defocus, the phenomenon shown is that the image is blurred and the image quality is poor under the infrared light condition

In addition, due to the large temperature difference between day and night, ordinary lenses are prone to changes in refractive index due to temperature changes, resulting in imaging shifts

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