High-pixel, low-cost and large-field-of-view zoom optical system

Abstract

The present invention discloses a high-pixel, low-cost and large-field-of-view zoom optical system. The system sequentially comprises a first lens group, a second lens group, a diaphragm, a third lens group and an optical filter from an object plane to an image plane. The first lens group is stationary relative to the image plane. The first lens group has a positive focal power. The first lens group includes a first lens and a second lens. The second lens group can move front and back relative to the image plane. The second lens group has a negative focal power. The second lens group includes a third lens, a fourth lens and a fifth lens. The third lens group can move front and back relative to the image plane. The third lens group has a positive focal power. The third lens group includes a sixth lens, a seventh lens, an eighth lens and a ninth lens. According to the technical scheme of the invention, the structure of three lens groups is adopted. The first lens group is stationary relative to the image plane. The second lens group and the third lens group move relative to the image plane. On the basis of the structure, optical performances are realized, while the complexity of the structure is reduced at the same time. Therefore, the accumulated tolerance between multiple lens groups is reduced, and the production yield rate is improved.

Description

[0001] 【Technical field】 [0002] The invention relates to a lens, especially a zoom optical system with high pixels, low cost and large field of view. [0003] 【Background technique】 [0004] At present, the zoom optical system used in video conferencing generally has such shortcomings: high system cost, low resolution, small field of view, complex structure, and inability to guarantee high and low temperature confocality of each focal length during the zooming process, etc. At present, there is no lens on the market that can completely overcome the above-mentioned shortcomings. Only a few lenses improve certain aspects at the expense of other aspects. For example, in order to achieve high pixels and large field of view, the system volume and cost have to be increased, which is far from meeting the reality of low cost and high pixels required by video conferencing. [0005] Therefore, the present invention just produces based on above deficiency. [0006] 【Content of inventi...

AI Technical Summary

Problems solved by technology

[0004] At present, the zoom optical system used in video conferencing generally has such shortcomings: high system cost, low resolution, small field of view, complex structure, and inability to guarantee high and low temperature confocality of each focal length during the zooming process, etc.

At present, there is no lens on the market that can completely overcome the above shortcomings

Only a few lenses improve a certain aspect at the expense of other aspects. For example, in order to achieve high pixels and a large field of view, the system volume and cost have to be increased, which is far from meeting the reality of low cost and high pixels required by video conferencing.

Images