Centralized solar coronagraph light path structure

Abstract

A centralized solar coronagraph light path structure belongs to the field of solar-terrestrial space and comprises an outer diaphragm, an outer shielding occulter, an incidence aperture diaphragm, an objective lens group, a field diaphragm, an inner shielding occulter, a field lens group, an Lyot diaphragm and a relay lens group. The outer diaphragm, the outer shielding occulter, the incidence aperture diaphragm, the objective lens group, the field diaphragm, the inner shielding occulter, the field lens group, the Lyot diaphragm and the relay lens group are arranged on an optical axis in a lens cone according to the sequence of sunlight incidence. The outer shielding occulter and the inner shielding occulter shield direct sunlight from entering an optical system. The field diaphragm is arranged at an objective lens group focal plane position. The inner shielding occulter is arranged at a position where the corona is imaged through the outer shielding occulter, and the outer shielding occulter is arranged at a conjugation position of the inner shielding occulter relative to the objective lens group. The Lyot diaphragm is arranged at a position where the incidence aperture diaphragm is imaged through the objective lens group and the field lens group. The centralized solar coronagraph light path structure is used for shielding direct light of a solar photosphere layer and achieves effective observation of the solar corona.

Description

technical field

[0001] The invention belongs to the field of solar-terrestrial space, and in particular relates to an optical path structure of a centered solar coronagraph. Background technique

[0002] The research objects in the field of solar-terrestrial space are solar-terrestrial space physics, solar-terrestrial space weather changes, etc. Through observation of solar activities, we can understand the impact of the sun on earth space and human society, and serve aerospace, communication, navigation, and national security. The observation and research of the solar corona is a more important part. The brightness of the corona is far lower than the brightness of the center of the sun, so the coronagraph used for observation needs to block the visible light in the sun’s photosphere. The optical path structure design that stray light is blocked is not ideal for the observation effect of the corona. Contents of the invention

[0003] In order to solve the problems existi...

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