Day and night dual-purpose monitoring lens and monitoring device

Abstract

The invention provides a day and night dual-purpose monitoring lens and a monitoring device adopting the day and night dual-purpose monitoring lens. The lens is simple in structure, is easy to process, is high in pixel, is large in aperture, is good in day-night confocal property, is small in number of lenses, and sequentially comprises the following parts from the object side to the image side along the optical axis: a first lens having negative focal power, the object side surface of the first lens being a convex surface, and the image side surface of the first lens being a concave surface;a second lens having positive focal power, the object side surface of the second lens being a concave surface, and the image side surface being a convex surface; a third lens having negative focal power, the object side surface being a convex surface, and the image side surface being a concave surface; a fourth lens having positive focal power, the object side surface of the fourth lens being a convex surface, and the image side surface being a convex surface; a fifth lens having positive focal power, the object side surface of the fifth lens being a convex surface, and the image side surfacebeing a convex surface; and a sixth lens having negative focal power, the object side surface of the sixth lens being a concave surface, the image side surface of the sixth lens being a concave surface, and the aperture number F# of the optical lens of the day and night monitoring lens meeting 1.4 < = F# < = 2.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a day and night monitoring lens and a monitoring device. Background technique [0002] With the rapid development of science and technology, people have higher technical requirements for security surveillance cameras. Most of the fixed-focus surveillance lenses popular in the market currently have a series of problems such as low resolution, small aperture, poor day and night confocal performance, and a large number of lenses used, so for high pixel, large aperture, day and night confocal The demand for surveillance lenses with good performance and fewer lenses is becoming more and more urgent. Contents of the invention [0003] In view of the above problems, the present invention provides a day and night monitoring lens and a monitoring device using the day and night monitoring lens, which has a simple structure, is easy to process, has high pixels, large aperture, go...

AI Technical Summary

Problems solved by technology

Most of the fixed-focus surveillance lenses popular in the market currently have a series of problems such as low resolution, small aperture, poor day and night confocal performance, and a large number of lenses used, so for high pixel, large aperture, day and night confocal The demand for surveillance lenses with good performance and fewer lenses is becoming more and more urgent

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