A built-in measurement device and measurement method for a large-aperture large-field telescope system

Abstract

The application discloses a built-in measurement device and measurement method for a large-aperture large-field telescope system, including: a tilt detection module, which is used to generate multiple laser beams and image them, align the formed images, and pass the shift of the light spot Obtain the angle information of the wavefront and feed it back to the pose adjustment module; the interferometric ranging module, located on one side of the tilt detection module, is used to measure the distance information of the optical truss and feed it back to the pose adjustment module; the pose adjustment module is used for According to the received angle information and distance information, the actuator is driven to adjust the spatial pose of the optical element. This application forms the information source of the optical truss through the results of angle measurement and distance measurement, which can effectively monitor the displacement and attitude between optical components, so as to ensure that the telescope can continuously monitor the system when the wavefront sensing cannot be performed through the guide star. The calibration command can realize real-time calibration and correction during the operation of the telescope, which greatly improves the time for the telescope to be in place.

Description

technical field [0001] The invention relates to the technical field of telescopes, in particular to a built-in measurement device and a measurement method for a large-aperture large-field telescope system. Background technique [0002] Large aperture and large field of view telescopes have developed rapidly in recent decades. In order to obtain higher sky survey efficiency and light collection capabilities, their apertures and fields of view are constantly expanding. Active optics, as the key technology of large aperture and large field of view telescopes, has been widely used. Many large-aperture and large-field-of-view telescopes have been developed and successfully operated abroad, and the eight-meter-class LSST has been put into construction, while domestic research on large-field-of-view telescopes over two meters has not yet been carried out. In order to further develop the detection capability of the large-aperture and large-field telescope, the independent and real-...

AI Technical Summary

Problems solved by technology

However, the error sources that actually affect the telescope may change over time. Regular repeated calibration has high frequency selectivity and cannot adapt to highly dynamic environmental changes, which limits the further improvement of the performance of active optical telescopes.

At present, there are different technologies, none of which can take into account the large dynamic range and high positioning accuracy at the same time

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