Large-target-surface and high-resolution day and night lens and use method thereof

Abstract

The invention relates to a large-target-surface and high-resolution day and night lens and a use method thereof. The mechanical structure of the lens comprises a front group lens base which is installed in an external cover and used for installing a front group A, a back group lens base which is used for installing a back group B, and an adjusting screw rod. The front group lens base is flexibly installed in a front group lens cone. The external side of the front group lens cone is sleeved by a front cam which drives the front group lens base to move forwardly and backwardly. The back group lens base is flexibly installed in a back group lens cone. The external side of the back group lens cone is sleeved by a back cam which drives the back group lens base to move forwardly and backwardly. An aperture is arranged between the front group lens cone and the back group lens cone. The front group lens base is externally sleeved by a focusing rotating wheel which drives the front cam to rotate. The front group lens cone is provided with a locking nail which is used for fixing a focusing position. The adjusting screw rod penetrates through the external cover and can drive the back cam to rotate. A focal length manual adjusting function is realized by the lens, the lens is suitable for 1 / 1.8" large-target-surface CCD chip and the lens has high-resolution imaging capability so that the market demands can be met.

Description

technical field [0001] The invention relates to a camera lens device of a monitoring system, in particular to a large-target high-resolution day-night dual-purpose lens and a use method thereof. Background technique [0002] During the construction and commissioning process, engineers need to adjust the focal length within a certain range to find an observation range that can satisfy users, without repeatedly changing lenses with different focal lengths. This is especially convenient in field construction. However, the conventional fixed focus The lens has only one focal length, and it is very inconvenient to observe when the environmental conditions of the monitoring site are not well understood, and the cost-effective application of the electric zoom lens in this respect will be superfluous. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a function of manually adjusting the...

AI Technical Summary

Problems solved by technology

[0002] During the construction and commissioning process, engineers need to adjust the focal length within a certain range to find an observation range that can satisfy users, without repeatedly changing lenses with different focal lengths. This is especially convenient in field construction. However, the conventional fixed focus The lens has only one focal length, and it is very inconvenient to observe when the environmental conditions of the monitoring site are not well understood, and the cost-effective application of the electric zoom lens in this regard will be superfluous.

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