Zoom infrared light fill-in lamp and video camera

Abstract

The invention discloses a zoom infrared light fill-in lamp and a video camera. The zoom infrared light fill-in lamp comprises an infrared light source, an infrared zoom lens assembly and a transmission device, wherein the infrared light source is used for emitting out infrared beams, the infrared zoom lens assembly is arranged on the emitting path of the infrared beams, can move relative to the infrared light source to accordingly change the size of an illuminated area of the infrared light source, and comprises at least one infrared zoom lens, and the infrared zoom lens assembly is in transmission connection with a zoom lens assembly through the transmission device to achieve synchronous zoom movement of the infrared zoom lens assembly and the zoom lens assembly. In this way, by means of the zoom infrared light fill-in lamp, zoom infrared light fill-in can be achieved, the use efficiency of infrared light can be improved, waste of the infrared light can be reduced, cost can be further reduced, and the infrared zoom structure and the infrared zoom control mode can be simplified.

Description

technical field [0001] The invention relates to the field of security monitoring, in particular to a zoom infrared supplementary light and a video camera. Background technique [0002] People pay more and more attention to the role of security monitoring equipment in protecting personnel and property safety at night or in dark environments. Due to the complex environment and actual needs, the demand for flexible zoom security monitoring equipment is increasing. For example, in order to obtain a clear image in a dark environment, the zoom security monitoring equipment is required to be able to perform infrared lighting or infrared supplementary light on the monitoring area. [0003] The infrared supplementary light technical solution of the zoom security monitoring equipment in the prior art mainly includes the following two methods. [0004] The first infrared fill light technology solution uses infrared light with a fixed beam angle. see figure 1 , in this supplementary...

AI Technical Summary

Problems solved by technology

This solution can change the angle of infrared light as the camera zooms, but the control of this method is more complicated and the cost is higher: the lens zoom and infrared zoom are driven by two motors separately, and a controller is required to adjust the zoom according to the lens zoom. Control the movement of the infrared zoom motor to realize the synchronization of infrared zoom and lens zoom

In addition, due to the limitations of the structure of the monitoring equipment and the size of the lens, some infrared light cannot be used ( figure 2 The light beam in the upper left part of the center is not incident on the first infrared zoom lens 4 and is wasted), resulting in a waste of infrared light, usually more than 20% of the waste

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