Unmanned plane lens

Abstract

The invention discloses an unmanned plane lens, and the lens sequentially comprises a front lens group, an aperture diaphragm and a rear lens group from the object space to the image space. The aperture diaphragm is located at the central part of the lens. The front lens group comprises a first lens with the negative focal length, a second lens with the negative focal length and a third lens with the positive focal length, wherein the first, second and third lenses are sequentially arranged from the object space to the image space. One surface, facing the object space, of each of the first, second and third lenses in the front lens group is a convex surface, and the surfaces, facing the image space, of the first and second lenses are concave surfaces. One surface, facing the image space, of the third lens is a convex surface. The rear lens group comprises a fourth lens with the positive focal length, a fifth lens with the negative focal length and a sixth lens with the positive focal length, wherein the fourth lens, the fifth lens and the sixth lens are sequentially arranged from the object space to the image space. One surface, facing the image space, of each lens of the rear lens group is a convex lens. The surfaces, facing the object space, of the fourth and sixth lenses are convex surfaces, and one surface, facing the object space, of the fifth lens is a concave surface. The lens provided by the invention is low in distortion, is big in view angle, is high in resolution, and is strong in capability of resisting the environment temperature changes.

Description

technical field [0001] The invention relates to an optical lens, in particular to an optical imaging lens for aerial photography of a drone. Background technique [0002] With the wide application of UAV aerial photography, the general UAV aerial photography lens can only record images in one direction at the same time, and the shooting frame is very limited, and the resolution of the lens itself is not high when shooting. It is not clear, the sharpness and layering are poor, and at the same time, the drone's aerial lens is distorted, resulting in image distortion, and there are also shortcomings such as large size. That is to say, the existing UAV aerial photography lenses have shortcomings such as small field of view, low resolution, poor sharpness and layering, large distortion, and large size. [0003] Chinese Patent Document No. CN 105403982 A disclosed on March 16, 2016 a high-quality optical imaging lens for unmanned aerial photography, and a Chinese Patent Document ...

AI Technical Summary

Problems solved by technology

[0002]With the wide application of UAV aerial photography, the general UAV aerial photography lens can only record images in a certain direction at the same time, and the shooting frame is very limited , and due to the low resolution of the lens itself when shooting, the captured image is not clear, the sharpness and layering are poor, and at the same time, the drone aerial photography lens is distorted greatly, resulting in image deformation, and there are also disadvantages such as large size

That is to say, the existing UAV aerial photography lenses have shortcomings such as small field of view, low resolution, poor sharpness and layering, large distortion, and large size.

[0003] Chinese Patent Document No. CN 105403982 A disclosed on March 16, 2016, a high-quality optical imaging lens for aerial photography of drones, and Chinese patent documents No. CN 105372789 A, disclosed on March 2, 2016, is a distortion-free, high-resolution, large-view UAV lens optical system, which has the disadvantage of large number of lenses and large volume.

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