Micro-point density modulation system of high-contrast imaging coronagraph and working method

Abstract

The invention discloses a high-contrast imaging coronagraph micro-point density modulation system, and relates to the technical field of coronagraph, the high-contrast imaging coronagraph micro-point density modulation system comprises a telescope incident end, two reflectors, a collimating mirror, an aperture diaphragm, a pupil modulator, an imaging mirror and a detector, the number of the reflectors is two, and the reflectors are respectively located between the telescope incident end and the collimating mirror and between the pupil modulator and the imaging mirror; the pupil modulator comprises a plurality of modulation bands, each modulation band is provided with a plurality of bright micro-points and dark micro-points, the range of the number of adjustment bands of the pupil modulator is 10-200, and the invention further provides a working method of the high-contrast imaging coronagraph micro-point density modulation system. According to the micro-point density modulation system for the high-contrast imaging coronagraph, the purpose of transmittance change modulation is achieved by changing the spatial density distribution of light and dark micro-points on a modulation band, and the same modulation effect can be achieved for all working wavelengths; according to the invention, the technical problem that the light transmission efficiency of a traditional coronagraph is limited due to too narrow observation wave band can be thoroughly solved.

Description

technical field [0001] The invention relates to the technical field of coronagraphs, in particular to a high-contrast imaging coronagraph micro-point density modulation system and a working method. Background technique [0002] Exoplanets are planets outside our solar system, i.e. planetary systems orbiting other stars or planets flying independently outside our solar system. Exoplanet detection is closely related to the search for extraterrestrial civilizations, which can break through human understanding of existing life and ultimately expand human living space. So far, more than 4,700 exoplanets have been detected, most of which were detected indirectly through the transit method or the Doppler effect method. Direct imaging technology can truly see exoplanets, which is the key to confirming the signature signals of extrasolar life. The coronagraph is an important instrument for high-contrast direct imaging of exoplanets, which can effectively suppress the strong light o...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a high-contrast imaging coronagraph micro-point density modulation system and working method to solve the problem that the traditional coronagraph system is limited by the modulation technology in the above-mentioned background technology, and can only be used in a narrower area. The realization of high-contrast imaging in the observation band limits the light transmission efficiency of the existing system, which is not conducive to the follow-up research on the detailed spectral characterization of planetary atmospheres

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