Automatic focusing method for laser night vision device

A laser night vision device and auto-focus technology, which is applied in the field of cameras, can solve problems such as troublesome focusing and unclear images, and achieve the effect of reducing repeated operations of frequent focusing

Inactive Publication Date: 2011-06-29
TIANJIN TIANDY DIGITAL TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

Traditional long-distance night vision systems have trouble focusing at night, the image of the preset position set during the day is not clear after being called at night, or the image of the preset position set at night is not clear after being called during the day

Method used

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  • Automatic focusing method for laser night vision device
  • Automatic focusing method for laser night vision device
  • Automatic focusing method for laser night vision device

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Embodiment Construction

[0022] The present invention will be described in detail below with reference to the drawings and examples.

[0023] figure 1 It is a structural diagram of the imaging part of the monitoring system using active laser infrared technology; figure 2 It is a flow chart of the method for automatic focusing of the laser night vision device of the present invention.

[0024] Such as figure 1 , figure 2 As shown, in the method for automatic focusing of the laser night vision device of the present invention, the imaging part of the above-mentioned monitoring equipment includes: a lens, which collects reflected light from the surrounding environment, and can realize zooming and focusing of electric control; The signal is converted into a video signal; the control board controls the zoom and focus operations of the lens, and the methods of autofocus include:

[0025] A. Determine the use environment of the imaging part;

[0026] B. Determine the light source used according to the ...

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Abstract

The invention discloses an automatic focusing method for a laser night vision device. The method comprises the following steps of: A, judging the using environment of an imaging part; B, determining the used light source according to the using environment; C, reading zoom position information of an imaging lens; D, compensating the focusing value of the lens according to different zoom positions of the lens by a control panel; and E, matching the focusing value and the zoom value to finish automatic focusing of the lens. The problems that focusing is performed by manual intervention during day and night conversion and the focusing is not clear are solved. The repeated operation of frequent focusing during night monitoring of a night vision system is reduced, the same presetting bit can be adopted in the daytime and at night, and the day and night presetting bit is not needed to be set repeatedly.

Description

technical field [0001] The present invention relates to the technical field of video cameras, specifically, it is a method of compensating the focus under different magnifications of the lens through the characteristics of different wavelengths of different light sources, so as to realize automatic focusing after the magnification operation of the lens under the illumination of different light sources, thereby maintaining day and night. The automatic focus method of the laser night vision device with clear focus after preset interactive setting and calling. Background technique [0002] The monitoring system is mainly composed of two parts: front-end equipment and back-end equipment. Perform its duties, and establish corresponding links with various equipment in the central control system through wired, wireless or optical fiber transmission media (transmitting video / audio signals and control and alarm signals). In the actual monitoring system, these front-end devices may n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/28H04N7/18
Inventor 戴林贾宝金苏炳友
Owner TIANJIN TIANDY DIGITAL TECH
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