Large-image-surface and high-resolution video conference optical imaging system

Abstract

The invention discloses a large-image-surface and high-resolution video conference optical imaging system. The large-image-surface and high-resolution video conference optical imaging system sequentially comprises a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6 and a seventh lens 7 from the object surface to the image surface, wherein the first lensis a negative-focal-length lens, the object side of the first lens 1 is a convex surface, and the image side of the first lens 1 is a concave surface; the second lens 2 is a positive-focal-length lens, the object side of the second lens 2 is a convex surface, and the image side of the second lens 2 is a concave surface; the third lens 3 is a positive-focal-length lens, and both the object side and image side of the third lens 3 are convex surfaces; the sixth lens 6 is a positive-focal-length crescent lens, the object side of the sixth lens 6 is a concave surface, and the image side of the sixth lens 6 is a convex surface; the seventh lens 7 is a negative-focal-length lens, the object surface and the image surface of the seventh lens 7 are nonspherical surfaces, and the image surface of the seventh lens 7 is provided with at least one inflexion point. The large-image-surface and high-resolution video conference optical imaging system has the advantages that the seven lenses combining nonspherical, spherical and adhering lens are adopted, the height of a photographic plate is IMC, the total focal length of the optical lenses is f, 0.4<f/IMC<0.5, and IMC>17mm; large-dimension imagingrequirements are satisfied, high-resolution imaging of 21 million pixels is achieved, and clear imaging is achieved.

Description

【Technical field】 [0001] The invention relates to an optical imaging system for a video conference with a large image surface and high pixels. 【Background technique】 [0002] Most of the existing video conferencing lenses on the market have a sensor image size of about 1 / 2.5 inch, and a pixel size of around 2.2 million pixels. The image quality is limited and cannot present perfect high-definition image quality. [0003] Due to the above-mentioned problems, it is necessary to propose a solution to it, and it is against this background that the present invention is proposed. 【Content of invention】 [0004] The technical problem to be solved by the present invention is to provide an optical imaging system for video conferencing with a large image surface and high pixels in view of the above-mentioned deficiencies in the prior art. The large-image surface high-pixel video conferencing optical imaging system has achieved 1inchsensor large-format imaging, 21 million high-pixel...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing video conferencing lenses on the market have a sensor image size of about 1 / 2.5inch, and a pixel size of around 2.2 million pixels. The image quality is limited, and the perfect high-definition image quality cannot be presented.

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