Pulse-laser-based beacon adaptive optical system
A technology of adaptive optics and pulsed laser, applied in radio wave measurement system, electromagnetic wave re-radiation, utilization of re-radiation, etc., to achieve the effect of overcoming guide star jitter error and eliminating the influence of Rayleigh scattering on wavefront detection
Active Publication Date: 2016-05-25
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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[0005] The technical problem solved by the present invention is: to solve the technical problem of emitting laser beacons and using laser beacons to detect and correct atmospheric turbulence, and to provide a beacon adaptive optical system for pulsed lasers to achieve high accuracy for dim targets. resolution imaging
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[0026] like figure 1 As shown, the present invention includes a pulsed laser emission system 27, a receiving telescope 1, a target star high-precision tracking sensor 29, an imaging detector 31, a deformable mirror 4, a target star wavefront detector 28, a laser beacon wavefront detector 30, Primary tilting mirror 3 and secondary tilting mirror 7;
[0027] Wherein the pulsed laser emission system 27 comprises a pulsed laser 26, a reflecting mirror 25, a tilting mirror 24, a secondary mirror 22, a focusing system 23 and a primary mirror 21; the target star wavefront detector 28 is made up of multiple sub-apertures 10 and a camera 11, and the camera 11 is placed on the focus position of the multi-sub-aperture 10; the target star high-precision tracking sensor 29 is made up of the imaging system 12 and the detector 13, and the detector 13 is placed on the focus position of the imaging system 12, and the target light passes through the imaging system 12 on the detector 13 Upper i...
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The invention relates to a pulse-laser-based beacon adaptive optical system comprising a laser beacon transmitting subsystem, a receiving telescope, a target star wave-front detector, a laser beacon wave-front detector, a target star high-precision tracking sensor, an imaging detector, a tilting control system, and a high-order aberration control system and the like. According to the system, with a two-stage tilting control system, high-precision tilting aberration control in a large dynamic range is realized; and with a two-stage deformation control system, separated detection and control on a low-frequency aberration and a high-frequency aberration are realized. The two sets of wave-front detectors are used for detecting tilting, low-order aberration, and high-order aberration signals provided by different signal light, so that problems of a non-isoplanatic error caused by independent laser beacon wave-front detection introduction and difficult elimination of a guiding start vibration error can be solved. Meanwhile, because of characteristics of the pulse laser, the influence on wave-front detection by rayleigh scattering of a telescope at different high angles can be eliminated effectively by using an externally triggering chopping technology, thereby realizing uninterrupted detection on wave-front errors by the laser beacon.
Description
technical field [0001] The invention relates to a beacon adaptive optics system based on pulsed laser, which is used for high-resolution imaging of dim targets, and in particular relates to an adaptive optics system aiming at the characteristics of laser beacons. Background technique [0002] Adaptive optics is a technology that detects and corrects dynamic aberrations in real time. Adaptive optics technology was first applied in the field of astronomical observation, using the sunlight reflected by the observed target itself as a beacon to detect wavefront errors and achieve high-resolution imaging of various stellar targets. In order to achieve high-resolution imaging recognition of faint targets, adaptive optics technology based on laser guide stars must be used. For the traditional adaptive optics technology, the wavefront sensor is mainly used to directly detect the target star, and the tilt, defocus and high-order aberration information are obtained at the same time, ...
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IPC IPC(8): G01S17/89
CPCG01S17/89
Inventor 李敏魏凯江长春马晓燠魏凌郑文佳周璐春晋凯张雨东
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI