5.2mm day and night dual-purpose ultra HD 4K prime lens

Abstract

The invention relates to a 5.2mm day and night dual-purpose ultra HD 4K prime lens. The prime lens includes a lens barrel, a front group A, a diaphragm and a rear group B are arranged in the lens barrel along an incidence direction of light in sequence from left to right, the front group A includes a minus crescent lens A-1, a biconcave lens A-2, a biconcave lens A-3 and a minus crescent lens A-4,the rear group B includes a biconcave lens B-1, a biconvex lens B-2 and a biconvex lens B-3 arranged in sequence, and the biconcave lens B-1 and the biconvex lens B-2 form a gluing group. The aberration of the lens in a wavelength range of 480 to 850mm is reasonably corrected and balanced, clear imaging can be realized in a light environment of the daytime, and clear imaging can also be realizedat night or in a relatively low-illumination environment through infrared light supplementation.

Description

technical field [0001] The invention relates to a 5.2mm day and night ultra-high-definition 4K fixed-focus lens. Background technique [0002] With the development of science and technology, the visual era has arrived, and people's pursuit of image quality will become higher and higher. Although there are a variety of surveillance cameras currently used in security systems on the market, because the optical performance indicators of these products are generally not high, and most of them are low-end products, they can only be adapted to chips with a maximum of 5 million pixels. , so the security market will be more and more eager for ultra-high pixel lenses. Contents of the invention [0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a 5.2mm day and night ultra-high-definition 4K fixed-focus lens. [0004] In order to solve the above technical problems, the technical solution of the present inv...

AI Technical Summary

Problems solved by technology

Although there are a variety of surveillance cameras currently used in security systems on the market, because the optical performance indicators of these products are generally not high, and most of them are low-end products, they can only be adapted to chips with a maximum of 5 million pixels. , so the security market will be more and more eager for ultra-high pixel lenses

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