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Atmospheric turbulence detection simulator used for self-adaptive optical system

A technology of adaptive optics and atmospheric turbulence, which is used in the testing of machine/structural components, instruments, measuring devices, etc., and can solve problems such as deterioration of imaging quality

Inactive Publication Date: 2011-08-31
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

When the laser beam is transmitted in the atmosphere, it will be affected by atmospheric turbulence and produce random dynamic distortion, which will lead to the deterioration of imaging quality
There is currently no such technology for beacons and atmospheric turbulence simulators for adaptive optics

Method used

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0027] Principle of the present invention: as figure 2 As shown, in the laser atmospheric transmission and imaging optical path, there are targets and beacons at different heights, mainly including observation targets, emission targets, sodium beacons and Rayleigh beacons. At the same time, atmospheric turbulence can be roughly divided into three layers according to height: The largest value, that is, the strongest turbulence, the higher the altitude The smaller the value; most models have a region of less turbulence at an altitude of 2 kilometers; and a region of stronger turbulence at 5-10 kilometers. According to the above characteristics of laser atmospheric transmission, using a certain scaled conjugate relation...

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Abstract

The invention discloses an atmospheric turbulence detection simulator used for an self-adaptive optical system, which comprises a beam contracting module, a first atmospheric turbulence simulation unit, a second atmospheric turbulence simulation unit, a first splitter, a third atmospheric turbulence simulation unit, a second splitter, a lens, a Rayleigh beacon, a natrium beacon, and a target; thefirst atmospheric turbulence simulation unit, the second atmospheric turbulence simulation unit, and the third atmospheric turbulence simulation unit respectively represent the atmospheric turbulencedistribution from lower elevation to higher elevation according to order from left to right in sequence; the Rayleigh beacon is arranged behind the first atmospheric turbulence simulation unit, the second atmospheric turbulence simulation unit, and the first splitter, before the third atmospheric turbulence simulation unit; the natrium beacon is arranged behind the third atmospheric turbulence simulation unit and the second splitter; and the target is arranged behind the second splitter and the lens, and represents an infinity target.

Description

technical field [0001] The invention relates to an atmospheric turbulence detection simulator for an adaptive optics system, which can be used in the adaptive optics system to simulate Rayleigh beacons, sodium beacons, and target beacons during laser uplink transmission, as well as dynamic aberration and The halo error is used to evaluate the influence of different beacon systems on the laser transmission and the correction effect of the adaptive optics system. Background technique [0002] The resolution of large ground-based telescopes is limited by random wavefront distortions caused by atmospheric turbulence. When adaptive optics technology is used, the imaging capabilities of such telescopes can reach near-diffraction-limited levels. The work of adaptive optics consists of two basic functions: wavefront detection and wavefront correction. By receiving light from the observed object or a nearby guide star, the wavefront sensor measures phase disturbances caused by turb...

Claims

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Application Information

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IPC IPC(8): G01M9/08
Inventor 李新阳李敏
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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