A Vacuum Sealing Device for Solar Telescope Thermal Aperture

Abstract

The invention provides a vacuum sealing device for a thermal diaphragm of a solar telescope. The vacuum sealing device comprises a cylindrical shell, wherein through grooves are formed in the top wall, the bottom wall and the side wall of the shell, and glass sealing windows are embedded in the through grooves. A diaphragm body is fixed into the shell, and the inside of the shell is in a vacuum sealed state. A concentrated light beam reflected by a primary mirror of the solar telescope penetrates through the glass sealing window on the top wall of the shell, after reaches a inclined plane of the diaphragm body, a small part of the light beam passes through an open hole in the middle part of the diaphragm body and penetrates through the glass sealing window on the bottom wall to a rear optical system, and most of the light beam is reflected by the inclined plane of the diaphragm body and then penetrates out of the glass sealing window on the side wall of the shell. According to the vacuum sealing device for the thermal diaphragm of the solar telescope encapsulates, the core region thermal diaphragm of the telescope is sealed and vacuumized to achieve the purpose of suppressing the turbulence caused by heat of the diaphragm of a field of view, and the technical problems that the aperture of a cylinder of the solar telescope cannot continue to be large and the image quality at theopen structural diaphragm is poor due to the fact that an overall vacuum enclosed structure is adopted are solved.

Description

technical field [0001] The invention relates to the technical field of precision optical instruments, in particular to a vacuum sealing device for a solar telescope thermal aperture. Background technique [0002] Solar telescopes are the main observation instruments for real-time monitoring and research on the laws of solar activity. Just like other types of astronomical telescopes, today's solar telescopes also use expanding their apertures as the main technical index, because large-aperture solar telescopes have the following two advantages: 1. Optics The ultimate spatial resolution of the system is limited by the diffraction effect. Only by increasing the aperture of the telescope can its spatial resolution be further improved, so that the observation target can be seen more clearly; 2. Increase its light-gathering ability. [0003] The local seeing at the thermal aperture of the solar telescope has an important impact on the final imaging effect of the telescope, because...

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Problems solved by technology

[0006] The object of the present invention is to provide a vacuum sealing device for solar telescope thermal diaphragm, to solve the problem that the lens barrel of the solar telescope in the prior art adopts an integral vacuum closed structure, so that the aperture cannot continue to be enlarged, and to solve the problem that the open Technical problem of image quality degradation caused by heat-induced air turbulence at the structural aperture

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