Front optical set for starlight-grade road monitoring zoom camera lens

Abstract

The invention provides a front optical set for a starlight-grade road monitoring zoom camera lens. The front optical set comprises a first lens (C1), a second lens (C2), a third lens (C3), a fourth lens (C4) and a fifth lens (C5) which are sequentially arranged along the incident direction of light, wherein the first lens (C1), the second lens (C2) and the fourth lens (C4) are normal-crescent-shaped lenses; the third lens (C3) is a double-concave type lens; the fifth lens (C5) is a double-convex type lens; a sealed-joint gluing group is formed by the first lens (C1) and the second lens (C2); and a sealed-joint gluing group is formed by the third lens (C3) and the fourth lens (C4). With the adoption of the front optical set provided by the invention, the starlight-grade road monitoring zoom camera lens can realize non-trailing and clear colorful monitoring at night without the need of an infrared lamp and a flash lamp.

Description

technical field [0001] The invention relates to the lens field, in particular to a front optical group for 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 d...

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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