Starlight-level road monitoring zoom lens

Abstract

The invention discloses a starlight-level road monitoring zoom lens which comprises a main lens barrel (3), and is characterized in that a front lens barrel (1), a diaphragm adjusting mechanism and a rear lens barrel (2) are arranged in the main lens barrel (3) in sequence along the incident direction of light rays, wherein a first lens (C1), a second lens (C2), a third lens (C3), a fourth lens (C4) and a fifth lens (C5) are arranged in the front lens barrel (1) in sequence along the incident direction of the light rays. The starlight-level road monitoring zoom lens adopts an ultra-large diaphragm technology to make the diaphragm value reach F2.0; furthermore, by the adoption of a multilayer broad-band film coating technology and an ultra-low dispersion optical glass technology, the lens effectively increases the light transmittance rate and relieves phenomena such as glaring and ghosting easily caused by a common lens; and in the aspect of appearance, the lens adopts a full-metal body, so that a metal shell achieves extremely good pressure bearing and protection effects on the lens.

Description

technical field [0001] The invention relates to the lens field, in particular to a star-level road monitoring zoom lens. Background technique [0002] Although the traditional infrared supplementary light technology can obtain clear images under low illumination, it will lose color and can only form black and white images. Moreover, through infrared supplementary light, highly reflective objects such as license plates are easily overexposed, while clothing colors, Car body color, license plate, etc. are often the key clues to solve the case, and cannot be lost—so there is an increasing demand for clear color imaging under low illumination. [0003] Low-light cameras are hot products in the monitoring industry launched with the development of semiconductor technology in recent years. A low-light camera, literally, refers to a camera that can still obtain relatively clear images under low-light conditions. At present, the security industry usually divides front-end cameras i...

AI Technical Summary

Problems solved by technology

[0002] Although the traditional infrared supplementary light technology can obtain clear images under low illumination, it will lose color and can only form black and white images. Moreover, through infrared supplementary light, highly reflective objects such as license plates are easily overexposed, while clothing colors, The color of the car body and the license plate are often the key clues to solve the case, which cannot be lost—so there are more and more demands for clear color imaging under low illumination

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