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Method and device for measuring wave height of emergent light wave of inter-satellites laser communication by interference wedge plate

A technology for laser communication and outgoing light, which is applied in the field of satellite laser communication to achieve the effects of reliable principle, simple structure and easy implementation.

Inactive Publication Date: 2012-03-07
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

The researchers used this phenomenon to show that using this method can double the sensitivity of measuring changes in the flatness of incident light waves using traditional interferometric methods, but this sensitivity was only obtained with the naked eye, and the method was only applied to A qualitative analysis of the sensitivity to changes in light wave flatness does not use changes in fringe angles to give a quantitative description of light wave height

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  • Method and device for measuring wave height of emergent light wave of inter-satellites laser communication by interference wedge plate
  • Method and device for measuring wave height of emergent light wave of inter-satellites laser communication by interference wedge plate
  • Method and device for measuring wave height of emergent light wave of inter-satellites laser communication by interference wedge plate

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[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and examples, but the protection scope of the present invention should not be limited thereto.

[0018] see first figure 1 , as can be seen from the figure, the present invention uses an interference wedge to measure the height of light waves emitted by inter-satellite laser communication, including:

[0019] The laser 1 emits an initial laser beam 2, and the beam 2 is incident on the microscopic objective lens 3, and the filter pinhole 4 is placed at the back focal plane of the microscopic objective lens 3 to play the role of spatial filtering. The microscope objective lens 3 and the primary mirror 6 of the collimator 5 are confocal, and the confocal position is the position where the filter aperture 4 is located. After the light beam passes through the collimator 5 , what emerges is the parallel light beam emitted by the inter-satellite laser communication to...

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Abstract

The invention discloses a method and a device for measuring the wave height of an emergent light wave of inter-satellites laser communication by an interference wedge plate. In the method, the wave height of the emergent spherical wave is measured according to the feature that interference fringes rotate anticlockwise or clockwise caused by the different defocus aberrations of the emergent light waves. The post processing is applied to the computer for sampling the fringes of the light spots, the rotation angle of the interference fringe relative to the horizontal fringe is obtained and the positive and negative wave heights of the emergent spherical wave are deduced. The invention has the advantages of dependable principle, simple structure of an optical system and capability of rapidly and conveniently giving out a quantitative measurement result.

Description

technical field [0001] The invention relates to satellite laser communication, in particular to a method and device for quantitatively measuring whether a spherical wave height is generated due to off-axis deviation of a plane wave emitted by an interference wedge to a transmitting terminal for satellite laser communication. When the outgoing plane wave has off-axis aberration and the resulting spherical wave height, fringes with a certain inclination angle will be generated on the interference wedge. By processing the inclination angle of the fringe, the corresponding spherical wave height can be obtained, so that the outgoing spherical wave can be obtained more conveniently. Quantitative description of off-axis aberrations. Background technique [0002] Inter-satellite laser communication is a technology that uses laser as the transmission medium to establish optical communication links between satellites to realize data transmission. Due to the particularity of inter-sat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J9/02G01B11/02
Inventor 鲁伟刘立人栾竹孙建锋戴恩文
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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