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Laser monitoring device based on charge-coupled device (CCD) auxiliary positioning and double-optical wedge light beam regulation and monitoring method by using same

A monitoring device and auxiliary positioning technology, which is applied in the direction of measuring devices, using re-radiation, re-radiation of electromagnetic waves, etc., can solve the problems of complex positioning, the influence of common mode interference, and the inability to effectively monitor the best vibration point, etc., to achieve positioning Simple, Effective Monitoring Effects

Inactive Publication Date: 2013-06-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a CCD-based auxiliary positioning-double optical wedge to solve the problems that the existing laser monitoring method has complex positioning, cannot effectively monitor the best vibration point, is affected by common mode interference, and the optical power contains limited monitoring information. Laser monitoring device with beam adjustment and monitoring method using the device

Method used

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  • Laser monitoring device based on charge-coupled device (CCD) auxiliary positioning and double-optical wedge light beam regulation and monitoring method by using same
  • Laser monitoring device based on charge-coupled device (CCD) auxiliary positioning and double-optical wedge light beam regulation and monitoring method by using same
  • Laser monitoring device based on charge-coupled device (CCD) auxiliary positioning and double-optical wedge light beam regulation and monitoring method by using same

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specific Embodiment approach 1

[0049] Specific implementation mode one: combine figure 1 Describe this embodiment, the laser listening device based on CCD-assisted positioning-double-wedge beam adjustment described in this embodiment includes a multi-dimensional composite adjustment table 1, a laser 2, a polarization beam splitter prism 3, a λ / 4 glass slide 4, and a double-wedge System 5, telescopic amplification system 6, CCD imaging system 7, computer 8, amplification circuit 9 and four-quadrant photodetector 10, laser 2, polarization beam splitter prism 3, λ / 4 glass slide 4, double optical wedge system 5 and telescope The far amplification system 6 is arranged sequentially along the direction of the laser light emitted by the laser 2, and the output optical axis of the laser 2, the λ / 4 glass slide 4, the double optical wedge system 5 and the central axis of the telescopic amplification system 6 coincide, and the double optical axis of the computer 8 The optical wedge control signal output end is connecte...

specific Embodiment approach 2

[0050] Specific implementation mode two: combination figure 2 Describe this embodiment, the difference between this embodiment and the laser monitoring device based on CCD auxiliary positioning-double wedge beam adjustment described in the first embodiment is that the amplifier circuit 9 includes a preamplifier circuit A, a summation amplifier circuit , preamplifier circuit B, differential circuit, subtraction circuit A and subtraction circuit B, the differential circuit differentiates the input signal with respect to time, and outputs the results after derivation respectively, the a quadrant signal input of the preamplifier circuit A end, b quadrant signal input end, c quadrant signal input end and d quadrant signal input end are the a quadrant signal input end, b quadrant signal input end, c quadrant signal input end and d quadrant signal input end of the amplifying circuit 9 respectively. The a-quadrant signal input terminal, b-quadrant signal input terminal, c-quadrant si...

specific Embodiment approach 3

[0056] Specific implementation mode three: combination figure 2 This embodiment is described. The difference between this embodiment and the laser monitoring device based on CCD-assisted positioning-double wedge beam adjustment described in the second embodiment is that the relationship between the output signal and the input signal of the differential circuit is:

[0057] The output signal of the a-quadrant signal output terminal is the differential of the input signal of the a-quadrant signal input terminal with respect to time,

[0058] The output signal at the b-quadrant signal output terminal is the time differential of the input signal at the b-quadrant signal input terminal,

[0059] The output signal at the c-quadrant signal output terminal is the time differential of the input signal at the c-quadrant signal input terminal,

[0060] The output signal of the d-quadrant signal output terminal is the time differential of the input signal of the d-quadrant signal input ...

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Abstract

The invention relates to a laser monitoring technology, discloses a laser monitoring device based on charge-coupled device (CCD) auxiliary positioning and double-optical wedge light beam regulation and a monitoring method by using the same and aims to solve the problems that a monitored object is complexly positioned, the optimal vibration point cannot be effectively monitored, the conventional laser monitoring method is influenced by common-mode interference capacity, and monitoring information of an optical signal is limited. The laser monitoring device comprises a multi-dimensional compound regulation table, a laser, a polarization light splitting prism, a lambda / 4 glass sheet, a double-light wedge system, a telescoping and amplifying system, a CCD imaging system, a computer, an amplifying circuit and a four-quadrant photoelectric detector. According to the laser monitoring system, a monitored target refection surface is searched by the CCD imaging system and divided into M*N array sub regions, the double-light wedge system is controlled for array scanning to ensure that a laser point falls to the array sub region with the maximum voltage signal, and the voltage signal is converted to a sound signal to obtain monitoring information. The laser monitoring device is applied to laser monitoring field.

Description

technical field [0001] The invention relates to a laser monitoring technology. Background technique [0002] Monitoring and anti-monitoring technology has always been one of the important topics of national defense, and has been widely used in military monitoring, spy wiretapping and police monitoring. Based on different monitoring technologies, it includes a variety of monitoring devices. For example, wired eavesdropping uses objectively existing lines such as telephone lines, network lines, and pre-buried eavesdropping lines to intercept target information, but wired eavesdropping must rely on "lines", so it is easy to be excluded by detection, and the anti-reconnaissance capability is very weak; software Radio interception is a passive receiving device, which consists of three parts: RF front-end reception, signal processing and computer processing. The software radio interception receiver has the advantages of small size, wide signal frequency bandwidth, powerful proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/06G01H9/00
Inventor 陈硕翟小玉胡鹏程
Owner HARBIN INST OF TECH