Solar large-view-field high-resolution imaging telescope based on deformable secondary mirror

Abstract

The invention provides a solar large-view-field high-resolution imaging telescope based on a deformable secondary mirror. The telescope comprises a primary mirror, a primary mirror temperature controlsystem, a thermal field diaphragm, a deformation secondary mirror, a six-axis parallel mechanism, a relay reflector group, a large-field wavefront detector, a large-field imaging detector and the like, and the deformation secondary mirror and the six-axis parallel mechanism are combined to correct surface atmospheric turbulence wavefront distortion in real time. The size of a typical solar activity area is 1-2 angular minutes, a traditional self-adaptive optical telescope is limited by an isoplanatic area, a high-resolution imaging view field is only about 10 angular seconds, and the large-view-field high-resolution observation requirement of the solar activity area cannot be met. The objective of the invention is to realize high-resolution imaging with a larger field of view. According to the invention, the deformation secondary mirror and the six-axis parallel mechanism in the telescope primary optical system are used for correcting the atmospheric turbulence of the earth surface layer, high-resolution imaging of a field of view of more than 2 angular minutes can be realized on a large-aperture (2m-8m) solar telescope, and the overall real-time high-resolution imaging of a solaractivity area is satisfied.

Description

technical field [0001] The invention relates to a solar adaptive optics telescope, in particular to a solar large-field-of-view high-resolution imaging telescope based on a deformable secondary mirror. Background technique [0002] High-resolution imaging of the sun is of great significance for solar physics research, space environment monitoring and space weather forecasting. The field of view of a typical solar active region spans 1 to 2 arc minutes (Thomas R. Rimmele, SolarAdaptive Optics, Living Rev. Solar Phys.8:2, p68, 2011), and the study of its evolution requires a large field of view High-resolution monitoring to obtain the highly dynamic fine structure of the solar active region, and discover the dynamic origin of solar flares and coronal mass ejections and other solar eruptive activities. However, the high-resolution imaging field of view of traditional solar adaptive optics telescopes is limited by the halo region of the atmosphere, which is only about 10 arcsec...

AI Technical Summary

Problems solved by technology

The existing surface adaptive optics telescope is limited by the relatively independent structure of the telescope and the adaptive optics system, and its typical high-resolution imaging field of view is only about 40 arcseconds to 1 arcminute (Deqing Ren, et al. Solar Ground- Layer Adaptive Optics, PUBLICATIONS OF THEASTRONOMICAL SOCIETY OF THE PACIFIC, 127:469–478, 2015; Ling Kong, et al. Prototype of solar ground layer adaptive optics at the 1m New Vacuum SolarTelescope, CHINESE OPTICS LETTERS, 14(10) 2016), unable to satisfy the non-scanning continuous large-field-of-view high-resolution observation of large solar active regions

The reason is that the existing surface adaptive optics telescope places the deformable mirror near the conjugate position of the pupil surface of the telescope’s back-end optical system, and faces the following limitations during the construction of the pupil plane conjugate position: Without loss of information, the entire optical system needs to satisfy a certain space-bandwidth product. For a large-aperture solar telescope, if a small-sized pupil plane conjugate position is constructed, the incident angle of the peripheral field of view at the pupil plane will be very large. Considering Due to aberration control, coating and other factors, the design of the relay optical system is very difficult; if the conjugate position of the pupil surface is constructed to be large enough to reduce the incident field of view, the relay optical system will be extremely large and complex

Therefore, the existing adaptive optics telescopes on the surface cannot meet the overall real-time high-resolution imaging observations of the active regions of the sun.

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