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Three-ring apodization filter based system and method used for measuring isoplanatic angles

A technology of a three-ring apodization mirror and a measurement system, which is applied in the directions of measurement device, measurement angle, mapping and navigation, etc., can solve the problems of not being able to fully satisfy the evaluation of adaptive optics compensation effect and low measurement accuracy.

Active Publication Date: 2014-01-01
NO 63655 TROOPS OF THE CHINESE PEOPLES LIBERATION ARMY
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Problems solved by technology

Domestic research units in this field mainly include the National Astronomical Observatory of the Chinese Academy of Sciences and the Anhui Institute of Optics and Mechanics. Their technical level is roughly equivalent to the level of the United States in the 1980s. They still use single-aperture apodization mirrors, which are at a relatively early stage and have low measurement accuracy. Fully meet the needs of astronomical optics site selection and adaptive optics compensation effect evaluation when light waves are transmitted in actual turbulent atmosphere

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  • Three-ring apodization filter based system and method used for measuring isoplanatic angles
  • Three-ring apodization filter based system and method used for measuring isoplanatic angles
  • Three-ring apodization filter based system and method used for measuring isoplanatic angles

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Embodiment Construction

[0058] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0059] After light waves travel through the atmosphere, atmospheric turbulence causes random fluctuations in the intensity of light waves. For the starlight light wave transmitted by a specially designed apodization mirror, its intensity fluctuation has a certain relationship with the equi-halation angle, so the required equi-halation angle can be given by measuring the fluctuation of the star light intensity.

[0060] see figure 1 , The principle of the equi-halo angle measurement system is: after the starlight is transmitted through the turbulent atmosphere, it is modulated by the apodized mirror and focused to the photodetector. The light intensity fluctuation has a definite relationship with the isohalation angle, and the isohalation angle can be obtained by inversion by measuring the in...

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Abstract

The invention discloses a three-ring apodization filter based system and a method used for measuring isoplanatic angles. The three-ring apodization filter based system comprises a three-ring apodization filter. Light wave modulated by the three-ring apodization filter enters into an optical receiving system; image formation of the received light wave is realized by an optical imaging system, and then the light wave is focused on a focal plane of a photomultiplier; analog-digital conversion, collection and processing of current signals of the photomultiplier are realized by an acquisition and processing system. All-weather measurement of isoplanatic angles at different height can be realized by using the three-ring apodization filter based system and the method, relative errors of the measured isoplanatic angles are relatively small, and measurement accuracy is relatively higher than that of existing isoplanatic angle measuring systems in domestic.

Description

technical field [0001] The invention belongs to the technical field of atmospheric optics, and relates to a system and a method for measuring equi-vigorant angles based on a three-ring apodized mirror. Background technique [0002] When light waves are transmitted in the atmosphere, due to the influence of atmospheric turbulence, the wavefront of the light waves will be distorted and the intensity will fluctuate. For the transmission of light waves, including lasers, in the actual atmosphere, atmospheric turbulence causes random deflection of the beam propagation direction, expansion of the beam, and random fluctuations in intensity, which affects optical engineering applications such as lasers. [0003] For ground-based astronomical optical observations, when a large-aperture optical receiving telescope is used to image a space observation target, the wavefront of the light wave emitted by the space observation target will be distorted due to atmospheric turbulence, which w...

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Application Information

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IPC IPC(8): G01C1/00G02B5/20
CPCG01C1/00G02B5/20
Inventor 强希文吴敏宗飞胡月宏强蔚
Owner NO 63655 TROOPS OF THE CHINESE PEOPLES LIBERATION ARMY
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