An imaging optical system

Abstract

The invention provides an imaging optical system comprising a first lens group, a second lens group and a light filter which are arranged from a light incident scene direction to an imaging plane in turn. The first lens group comprises a first spherical lens, a second spherical lens, a third spherical lens, a fourth spherical lens and a fifth spherical lens which are arranged along the light incident direction. The second lens group comprises a sixth spherical lens, a seventh spherical lens, an eighth spherical lens and a ninth aspherical lens which are arranged along the light incident direction. The first spherical lens has positive focal power. The second spherical lens, the third spherical lens and the fourth spherical lens have negative focal power. The fifth spherical lens has the positive focal power. The sixth spherical lens has the positive focal power. The seventh spherical lens and the eighth spherical lens form a gluing piece and the whole body has the negative focal power. The ninth aspherical lens has the positive focal power.

Description

technical field [0001] The invention relates to an optical imaging system. Background technique [0002] In the field of sports DV and UAV aerial photography, it is necessary to use imaging optical system to capture images and shoot videos. Sports DV is generally fixed on the athlete's body or equipment, and is used to record the athlete's exercise state or surrounding environment when the athlete is active. For example, in skydiving, the sports DV is used to fix on the body of the skydivers, and is used to record the state of the surrounding skydivers and the scenery that can be watched during the skydiving. When this video is played again, it can make people feel immersive. In order to record as many surrounding images as possible, sports DV generally have a large field of view. When taking aerial photography with a UAV, it is also necessary to capture objects within as large an angle as possible. At the same time, in order to make the observed scenes closer to reality...

AI Technical Summary

Problems solved by technology

The human eye is more sensitive to TV distortion. Once the TV distortion is greater than 2%, it will make people feel that the picture is distorted.

Therefore, although the images obtained by many consumer products have a large field of view, which meets the needs of consumers to capture more comprehensive images, but at the same time, accompanied by large TV distortion, the display effect of the image is distorted and the viewing effect is reduced. The sense of substitution and realism in the image

[0007] 2. Poor image quality around the screen

At this time, the surrounding scenery squeezes together to occupy fewer pixels, resulting in insufficient clarity of the peripheral field of view.

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