Self-adaptive optical system

Abstract

The invention relates to a self-adaptive optical system. The self-adaptive optical system comprises a reflector group, a spherical mirror, a first-stage beam expander group, a first-stage tracking unit, a second-stage tracking and high-order aberration closed-loop correction unit and an imaging unit, the first-stage tracking unit comprises a first fast control reflector, a first spectroscope, a tracking imaging lens and a short wave infrared tracking camera; and the second-stage tracking and high-order aberration closed-loop correction unit comprises a second fast control reflector, a second-stage beam expander group, a piezoelectric deformable mirror, a third-stage beam expander group, a second spectroscope, a first Shack-Hartmann wavefront sensor beam shrinking lens, a Hartmann field diaphragm, a second Shack-Hartmann wavefront sensor beam shrinking lens, and a Shack-Hartmann wavefront sensor. The problem that the self-adaptive optical system cannot work normally in the visible light band in the background of strong daylight in the daytime is solved.

Description

technical field [0001] The invention belongs to the technical field of telescopic imaging, and in particular relates to an adaptive optical system. Background technique [0002] Ground-based telescopes are important tools for humans to conduct remote sensing observations of space debris, celestial bodies or the earth. With the continuous development of ground-based telescopes, the adaptive optics system has become a necessary means to improve the imaging resolution of ground-based large-aperture photoelectric telescopes because it can correct the wavefront distortion caused by atmospheric turbulence. There are still many problems with ground-based telescopes for space debris detection. Conventional adaptive optics ground-based telescopes work in the visible light range. In practical applications, some space debris is blocked by the earth and can only be observed near dawn and evening, and some space debris only appears above a fixed area and in a fixed place during the day...

AI Technical Summary

Problems solved by technology

The existing Shaker-Hartmann wavefront sensor cannot work normally in the background of strong skylight during the day, so ground-based telescopes cannot achieve high-resolution imaging under the background of strong skylight in the daytime

Under the background of strong skylight in daytime, the sub-apertures of the microlens array of the Shack-Hartmann wavefront sensor have serious crosstalk. With each sub-aperture as the center, the background of its adjacent sub-apertures will interfere with the background of the central sub-aperture, which is equivalent to The effect of the background enhancer reduces the detection signal-to-noise ratio, resulting in the inability to accurately obtain centroid and wavefront information

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