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Analysis method, verification system and verification method of laser echo transmission characteristic

A technology of transmission characteristics and analysis methods, applied in the field of verification systems and analysis methods of laser echo transmission characteristics, can solve the problems of low accuracy of analysis results, and achieve high application value, high research value, and accurate analysis results.

Inactive Publication Date: 2017-02-22
RUN TECH CO LTD BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide an analysis method, verification system and verification method of laser echo transmission characteristics, so as to solve the problem of low accuracy of the analysis results of the existing analysis schemes of laser echo transmission characteristics based on geometric optics

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  • Analysis method, verification system and verification method of laser echo transmission characteristic
  • Analysis method, verification system and verification method of laser echo transmission characteristic
  • Analysis method, verification system and verification method of laser echo transmission characteristic

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Embodiment 1

[0053] Figure 4 A schematic flow chart of a laser echo transmission characteristic analysis method provided in Embodiment 1 of the present invention, as shown in Figure 4 As shown, the method includes:

[0054] Step 401, the cat's eye system is equivalent to a thin lens and a mirror, and the transmission process of irradiating the cat's eye system with a Gaussian beam is equivalent to a 4f system with defocus.

[0055] The cat's eye system in this embodiment can be specifically understood as a photoelectric system to be detected, that is, a target actively detected by a laser. In this embodiment, the "cat's eye system" is equivalent to a thin lens and a mirror to study the transmission characteristics of Gaussian beams. When passing through a thin lens, the Gaussian beam does not change and remains a Gaussian beam. Figure 5 A schematic diagram of the propagation of a Gaussian beam passing through a thin lens is provided for Embodiment 1 of the present invention. It can b...

Embodiment 2

[0089] Figure 7 A schematic diagram of a laser echo transmission characteristic verification system provided by Embodiment 2 of the present invention. The system is used to verify the reflected beam divergence angle and defocus amount obtained in the analysis method of laser echo transmission characteristics provided by the embodiment of the present invention. To verify the relationship between the system, the system includes: a laser 701, a first attenuation sheet 702, a beam splitter 703, a thin lens 704, a micro-motion stage 705 including a first image sensor 706, a second attenuation sheet 707 and a second image sensor 708 .

[0090] Wherein, the laser 701 is used to emit a Gaussian beam, and the Gaussian beam sequentially passes through the first attenuation plate 702 , the beam splitter 703 and the thin lens 704 to converge to the first image sensor 706 . The micro-motion workbench 705 is used to adjust the defocus amount of the verification system. The first image se...

Embodiment 3

[0094] Figure 8 A schematic diagram of a method for verifying the transmission characteristics of laser echoes provided in Embodiment 3, which is used to apply the verification system for transmission characteristics of laser echoes described in the embodiments of the present invention to the laser echo transmission characteristics described in the embodiments of the present invention The relationship between the divergence angle of the reflected beam and the amount of defocus obtained in the analytical method of transmission characteristics is verified. Such as Figure 8 As shown, the method includes the following steps:

[0095] Step 801, turn on the laser.

[0096] Step 802 , adjusting the defocus amount of the verification system of the laser echo transmission characteristic by moving the micro-motion worktable.

[0097] Step 803 , for each set defocus amount, calculate the spot radius according to the spot image collected by the second image sensor, and calculate the ...

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Abstract

The embodiment of the invention discloses an analysis method, verification system and verification method of a laser echo transmission characteristic. The analysis method includes the steps: enabling a cat-eye system to be equivalent to a thin lens and a reflector, and enabling the transmission process of a gauss beam irradiation cat-eye system to be equivalent to a 4f system with defocusing amount; utilizing matrix optics to analyze the 4f system to obtain a transmission matrix of the gauss beam irradiation cat-eye system; according to the transmission matrix, an ABCD law of the gauss beam, the transformation rule of a q parameter, and an input parameter of the gauss beam, obtaining a light spot radius of a reflected light beam; and according to the relationship between the divergence angle of the reflected light beam and the light spot radius of the reflected light beam, obtaining the relationship between the divergence angle of the reflected light beam and the defocusing amount. The analysis method of a laser echo transmission characteristic can reveal the rule about influence of the defocusing amount on the cat-eye echo divergence angle, can get a more accurate analysis result compared with the analysis result based on geometrical optics, and has very high application value and research value.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of laser detection, and in particular to an analysis method, verification system and verification method of laser echo transmission characteristics. Background technique [0002] When parallel light beams or laser beams irradiate the focal plane imaging system in the direction of the optical axis, collimated return light can be produced, which is the so-called "cat's eye effect". Rapid and accurate positioning of the target can be achieved by detecting the optical window of the photoelectric device. According to the "cat's eye" target, the echo power is about 10 of the background diffuse reflection power. 2 ~10 3 The detection of the "cat's eye" target can be realized at a multiple times, so it is of high research value to deeply analyze the echo transmission characteristics of the "cat's eye" target. [0003] At present, geometric optics is generally used to study the transmission ch...

Claims

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Application Information

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IPC IPC(8): G01S7/497
CPCG01S7/497
Inventor 李会
Owner RUN TECH CO LTD BEIJING
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