Thermal diaphragm suitable for annular solar telescope

A technology for solar telescopes and thermal apertures, applied in the field of thermal apertures, can solve problems such as difficulty in processing deflectors, affecting heat dissipation effects, and difficult flow of coolant, so as to ensure spatial resolution and polarization measurement accuracy, and ensure spatial resolution efficiency and reduce design difficulty
CN110596879AActive Publication Date: 2019-12-20YUNNAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YUNNAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
Publication Date
2019-12-20

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Abstract

The invention provides a thermal diaphragm suitable for an annular solar telescope. One end of the thermal diaphragm suitable for the annular solar telescope toward the direction of light incidence isa reflective surface, and the other end is a bottom surface; the reflective surface of the thermal diaphragm suitable for the annular solar telescope is an inverted cone shape, and the bottom surfaceis a positive cone shape; the reflective surface with the inverted cone shape and the bottom surface with the positive cone shape are tangent at the vertexes of the two cones to form a light passinghole; and the cone angle of the inverted cone of the reflective surface is 88 to 93 degrees. The thermal diaphragm structure design provided by the invention strengthens the thermal control ability near the light passing hole, optimizes the temperature field near the light passing hole, reduces stray light to the greatest extent, and suppresses a ghost image; and the thermal diaphragm suitable forthe annular solar telescope has good temperature control effect, no ghost image and good stray light suppression effect, which ensures the imaging quality of the telescope.
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Description

technical field

[0001] The invention relates to the technical field of precision optical instruments, in particular to a thermal aperture suitable for an annular solar telescope. Background technique

[0002] The design of solar telescope thermal aperture faces the problem of thermal control of the aperture and the processing of light outside the field of view. Regarding thermal control, the local seeing at the thermal aperture has an important impact on the final imaging effect of the telescope. The turbulence generated by the heat of the thermal aperture will cause image plane jitter, image plane defocus, and image quality degradation. In order to suppress The thermal diaphragm is affected by the thermal turbulence of the light surface on the image quality, so it needs to be thermally controlled to ensure that the thermal diaphragm is not damaged by heat. Regarding the processing of light outside the field of view, it can be divided into two parts: ghost image and stray l...

Claims

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