A single-pixel star sensor and its target starry sky detection method

Abstract

The invention provides a single-pixel star sensor and a target star sky detection method thereof. The single-pixel star sensor comprises a hood, an optical telescope, a spatial light modulator, single photon detection equipment, electronic readout equipment, a satellite-borne time-frequency device and satellite-borne data processing equipment. Optical signals acquired by the hood and the optical telescope are modulated by the spatial light modulator and then are reflected to enter the single photon detection equipment, the acquired optical signals and the spatial light modulator are subjected to time synchronization by virtue of the satellite-borne time-frequency device, and a modulation matrix called in from the satellite-borne data processing equipment by the spatial light modulator and the modulated optical signals are processed in the satellite-borne data processing equipment. A computing quantum imaging technology is utilized, the optical signals are converged, are modulated by the spatial light modulator and then enter the single photon detector, the single-pixel imaging on the starry sky is realized by virtue of computing, a dark star is easily detected, and the detection sensitivity is greatly improved.

Description

technical field [0001] The invention relates to a star sensor based on quantum imaging technology and a target starry sky detection method thereof, in particular to a single-pixel star sensor and a target starry sky detection method thereof, belonging to the field of star sensors. Background technique [0002] Star sensors were first successfully developed in the 1950s and are mainly used in aircraft and missile navigation. It has gone through three stages of development so far, and has been widely used in aerospace devices such as missiles, aircraft, spacecraft, satellites, etc., involving multiple measurement fields. Comparing several commonly used sensors, the star sensor has the advantages of high precision, light weight, low power consumption, no drift and many working modes. The early star sensors used the image resolution tube as the detection device. This kind of structure device is relatively simple, and it is mainly used in ground instruments such as large astrono...

AI Technical Summary

Problems solved by technology

The early star sensors used the image resolution tube as the detection device. This kind of structure device is relatively simple, and it is mainly used in ground instruments such as large astronomical telescopes and missile guidance. However, due to the limitation of the simulation stability of the image resolution tube itself, it cannot meet the requirements of high precision Require

[0003] In 1974, the Jet Laboratory (JPL) of the United States began to develop the second-generation star sensor---CCD star sensor. Compared with the star sensor of the first stage, the CCD star sensor has high resolution and radiation resistance. However, its relative field of view is small. Although the measurement accuracy of a single star is high, the recognition and attitude calculation of a single star are too complicated, and the quality and volume of the star sensor are relatively large; until the last century In the 1990s, in order to meet the strict requirements of aerospace devices, based on the substantial improvement of optics, precision machinery, electronics and computer technology, the second generation of CCD star sensors began to appear. The new generation of star sensors has a large field of view, star Small table and other advantages, more independent navigation function

At this stage, CCD star sensors are widely used in domestic and international markets, but regardless of the first generation or second generation star sensors, CCD star sensors are based on the development level of CCD cameras, and are limited by parameters such as the number of CCD pixels.

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