Liquid crystal wave plate birefringent filter

Abstract

The invention relates to a liquid crystal wave plate birefringent filter comprising a crystal base, end covers, and a sleeve. The crystal base internally includes a crystal cavity for arranging crystals, and the crystals are of a multi-stage Lyot structure in the crystal cavity and are axially arranged in a penetrating manner. The sleeve is arranged outside the crystal cavity, and the two ends of the sleeve are each equipped with one end cover for sealing. The end covers are each equipped with a vacuum socket which includes an electrode line connected to the crystals. A diversion trench is arranged in the crystal cavity, the gaps between the diversion trench and the crystals and the gaps between the crystal cavity and the crystals are filled with silicone oil, and the inner side of each end cover is provided with an oil storage chamber communicated with the diversion trench. The vacuum sockets each include an electrode line, and the crystal structure is changed through current to achieve the purpose of phase delay. The diversion trench for silicone oil circulation is arranged in the crystal cavity, and the gaps between the crystals are filled with silicone oil, so that the refractive index is not affected because of the gaps between the crystals. When the silicone oil expands due to temperature rise, the silicone oil can be flowed to the oil storage chamber to alleviate their situation.

Description

technical field [0001] The invention relates to the technical field of solar observation equipment, in particular to a liquid crystal wave plate birefringence filter. Background technique [0002] With the deepening of solar physics research, the requirements for the wavelength band, viewing angle and resolution of solar observation have also increased. With the development of the times, traditional ground-based observations are constantly updating equipment, improving image processing methods, and enhancing ground-based observation capabilities. However, due to the influence of the earth's atmospheric absorption, disturbance, background radiation and observation base environment such as weather, it is gradually difficult to meet the increasing observation requirements. Compared with traditional ground-based observations, space observations have unmatched advantages in terms of observation frequency bands, spatial and energy resolution limits, and observable time periods. ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a liquid crystal wave plate birefringence filter to solve the problem of lack of equipment using photoelectric modulation in the prior art, to achieve a birefringence filter with small volume, accurate beam propagation, and convenient crystal phase structure change device

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