Apparatus and method for zoom lens imaging

Abstract

The present invention relates to a device and method for imaging with a zoom lens. The device includes at least two zoom imaging units, the focal lengths of each zoom imaging unit are sequentially increased, and the focal lengths of two adjacent zoom imaging units partially overlap; a channel selector connected to the zoom imaging unit is used to select at least one zoom imaging unit The signal input by the unit is used as its output; the control unit is respectively connected to the zoom imaging unit and the channel selector in communication; the control unit is used to control the focal length of the zoom imaging unit currently imaged and the zoom imaging unit imaged at the next moment and the focal length of the focal length. The focal lengths between the two zoom imaging units overlap in sequence, and the channel selector is also controlled to sequentially switch from the zoom imaging unit currently imaging as the signal input end to the zoom imaging unit imaging at the next moment as the signal input end. The device and method can reduce the attenuation effect of the large-range focal length zoom lens on the ambient illumination.

Description

technical field [0001] The present invention relates to a video imaging device, and more specifically, to a zoom lens imaging device and method. Background technique [0002] Data analysis by the public security department shows that illegal and criminal acts usually occur in areas with low illumination and poor lighting conditions. In terms of crime time, more crimes were committed at night than during the day, accounting for 79.1%. Therefore, after the video image imaging device (hereinafter referred to as the camera) enters the field of public security monitoring, the minimum illumination condition (hereinafter referred to as the low-illuminance performance) of the camera that can meet the basic imaging index has become the goal pursued by users. At the same time, in order to improve the use efficiency of the camera, the maximum range that the camera can see from near to far (hereinafter referred to as coverage) has also become the focus of attention of users. [0003] ...

AI Technical Summary

Problems solved by technology

[0016] The various compensation methods mentioned above have their own advantages and disadvantages, but they have not fundamentally solved the problem of attenuation of ambient illumination by the continuous zoom lens, and the existing performance of the image sensor has not yet been fully reflected at the long focal point of the lens.

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