High-contrast telescope by using super surface phase modulation

Abstract

The present invention provides a high-contrast telescope by using super surface phase modulation. A super surface as a phase mask plate is added into an astronomical telescope system, wherein the super surface consists of nano column units arranged in the radial direction and a substrate, the rotation angle of each nano column consists of a radial rotation angle and an axial rotation angle, the circular polarized light incident on the substrate is subjected to phase modulation by using a geometric phase principle to generate vortex light beams with energy concentrated on the periphery of the light beams, the purpose of eliminating the part of the energy is achieved by the shielding effect of a Rio diaphragm in front of an imaging lens, and meanwhile, the super surface phase mask plate does not influence obliquely incident light. Therefore, the oblique incidence planetary light can be well imaged while the normal incidence constant star light is eliminated, and a high-contrast telescope system is achieved. The high-contrast telescope by using super surface phase modulation has important values in the aspects of planetary observation and resolution, space target observation, miniaturization and compactness of telescope, super-surface application and the like.

Description

technical field [0001] The invention belongs to the field of micro-nano optics and astronomical observation, and relates to a micro-optical device and a telescope system, in particular to a high-contrast telescope utilizing metasurface phase modulation. Background technique [0002] Traditional telescopes cannot directly detect and image exoplanets and objects in space with energy much lower than that of stars. The main reason is that their light intensity is much lower than that of stars. In telescope imaging, the focused light spots of planetary light and space objects often fall in the side lobes of the focused light spot of star light, so that the planetary light cannot be directly observed. Therefore, how to eliminate the high-brightness star in the center and image the darker target next to it, that is, to obtain a high-contrast imaging picture, has become the biggest problem in direct observation of space-seeing targets. At present, the telescopes used for observatio...

AI Technical Summary

Problems solved by technology

[0002] Traditional telescopes cannot directly detect and image exoplanets and objects in space whose energy is much lower than that of stars. The main reason is that their light intensity is much lower than that of stars.

In telescope imaging, the focused light spots of planetary light and space objects often fall in the side lobes of the focused light spot of star light, so that the planetary light cannot be directly observed

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