Large-caliber solar telescope full absorption thermal diaphragm based on dual-channel cooling

Abstract

The invention relates to a large-caliber solar telescope full absorption thermal diaphragm based on dual-channel cooling. The large-caliber solar telescope full absorption thermal diaphragm has smallinterference to light path, is easy to control in temperature, and is less likely to be affected by environment, so that the solar telescope delivers a much better observation effect. Structurally, the thermal diaphragm comprises a shell, an absorption screen, a middle cone, and a conic view field diaphragm that are arranged coaxially in sequence from outside to inside, wherein an outer pressure cavity is formed between the shell and the absorption screen, an absorption cavity is formed between the absorption screen and the middle cone, an internal pressure cavity is formed between the middlecone and the conic view field diaphragm, an entrance water storage tank communicated with the internal pressure cavity is arranged outside the internal pressure cavity, the entrance water storage tankis provided with a liquid inlet tube, the water inlet tube is communicated with a cooling liquid supply device, an external pressure cavity and the internal pressure cavity are communicated through aconnection tube, one end of a liquid outlet tube is communicated with the external pressure cavity, the other end thereof is communicated with the cooling liquid supply device.

Description

technical field [0001] The invention relates to an optical element, in particular to a full-absorption thermal diaphragm of a large-aperture solar telescope based on double-channel cooling. Background technique [0002] The Sun is the main source of Earth's energy and is also a magnetically active star, supporting a strong magnetic field that changes from year to year. Solar activities (mainly changes in the solar magnetic field, such as sunspots, flares, solar wind, etc.) have a direct and important impact on the Earth's climate, ionosphere (interfering communications), and geomagnetic field ("magnetic storm" phenomenon). With the development of astronomy, solar physics and other disciplines, the requirements for the observation of the solar magnetic field and the research of related solar physical phenomena are getting higher and higher, and the traditional indirect measurement of the solar magnetic field has been gradually realized to the direct measurement. [0003] The...

AI Technical Summary

Problems solved by technology

The thermal diaphragm has a large amount of reflection of solar radiation (reflective thermal diaphragm is mainly used for this) and absorption (full absorption thermal diaphragm is mainly used for this), and the temperature of the thermal diaphragm and the environment will produce hundreds of degrees Celsius in a short period of time. Even the temperature difference of thousands of degrees Celsius not only causes a serious internal seeing effect of the thermal aperture, but also directly affects the effectiveness of the observation, and even causes permanent failure of the thermal aperture

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