Ultraviolet fixed star simulator for calibrating ultraviolet navigation sensor

Abstract

The invention discloses an ultraviolet fixed star simulator for calibrating an ultraviolet navigation sensor. The ultraviolet fixed star simulator comprises a black surface plate, an LED (Light-emitting Diode) light, optical fibers, deuterium lamps, optical filters and modulating disks, wherein the LED light for simulating the earth is arranged in the middle of the black surface plate; N light holes for simulating a fixed star are arranged on the periphery of the LED light; the optical fiber and the deuterium lamp are assembled on each light hole; each deuterium lamp is used as a light source to output an ultraviolet spectrum with 360nm-200nm; the modulating disk is arranged between an inlet of each optical fiber and each deuterium lamp; the optical filter with different ultraviolet spectrum sections is arranged on each modulating disk; and a motor drives each modulating disk to rotate so as to drive each optical filter to rotate, so that the optical fibers radiate ultraviolet lights with spectrum sections. According to the invention, a silica fiber assembly is adopted to simulate fixed star ultraviolet spectrum radiation, and silica fibers simulate ultraviolet single fixed stars, multiple fixed star ultraviolet spectrum radiation models through different combination manners. The ultraviolet fixed star simulator has a simple structure, is easy to realize, and solves the problem of static and dynamic calibration of ultraviolet star points and star maps of the ultraviolet navigation sensor.

Description

technical field [0001] The invention relates to an ultraviolet star simulator, in particular to an ultraviolet star simulator used for calibrating ultraviolet navigation sensors. Background technique [0002] The working principle of the ultraviolet navigation sensor is derived from the ultraviolet three-axis earth attitude sensor. The patent No. US5837894 applied by Honeywell Company of the United States is named "WideField of View Sensor with diffrative Optical Corrector", which discloses a method using ultraviolet spectrum The three-axis attitude sensor uses a combined reflective dihedral reflective array and a ball lens system to form a combined optical system with a large field of view. The central field of view is used to observe other celestial objects, which constitutes an optical system with two information channels that are sensitive to two information channels (such as stars and the earth) at the same time. After processing, three-axis attitude data and autonomou...

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Problems solved by technology

[0004] At present, the ultraviolet navigation sensor used in high orbit is a solar-blind ultraviolet spectrum near 300nm that can observe stars and the earth at the same time, and simultaneously image the ultraviolet navigation sensor on the CCD. During the development of the ultraviolet navigation sensor, it is necessary to Since the ground cannot know the real situation of the ultraviolet navigation sensor in space, it is necessary to establish a star simulator in the ultraviolet spectrum to calibrate the ultraviolet navigation sensor

At present, the existing star simulators are all in the visible spectrum, and the luminous target surface is realized by a liquid crystal light valve. The pre-installed star map is controlled by software, and the distribution of space star points can be displayed arbitrarily. Liquid crystal light valves cannot pass through ultraviolet light, nor can liquid crystal light valves be used to simulate star radiation and star distribution, so they cannot be used as a calibration device for ultraviolet star sensors

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