Phase shift error correction device for sparse optical synthetic aperture imaging system

Abstract

The invention discloses a phase shift error correction device for a sparse optical synthetic aperture imaging system, which is composed of a sparse optical synthetic aperture telescope, an adaptive optical system, an error compensator, error compensation controller, a beam splitter, a beam switch, achromatic condition imaging elements, scientific cameras and an error calculation unit. The beam switch, the achromatic condition imaging element, the scientific camera and the error calculation unit form an error detection module; the error compensator and the error compensation controller form an error compensation module; and the other set of achromatic condition imaging element and the scientific camera form an imaging module. The error detection module is used for solving the phase shift error; and the error compensation module is used for compensating the phase shift error. Complete correction of the phase shift error in the system can be implemented by performing the detection process and the compensation process for different sub-aperture pairs. The device can effectively implement the function of detecting and compensating the phase shift error, and has improvement on aspects of accuracy, real-time property and the like in comparison with the detection technology of the current similar system.

Description

technical field [0001] The invention relates to a phase translation error correction device of a sparse optical synthetic aperture imaging system based on far-field similarity. Background technique [0002] As an important branch of incoherent optical synthetic aperture technology, sparse synthetic aperture technology uses multiple sub-apertures arranged in a specific space to directly coherently combine to image the target, which has the advantages of direct imaging and instantaneous frequency coverage. The correction of phase translation error (also called piston error) has an important impact on whether the system can achieve high-resolution imaging, and the detection of phase translation error has become one of the focuses of research in related fields. At present, the detection technologies that have been proposed mainly include the following: [0003] (1) Fringe Pattern Tracking: [0004] Foreign literature "Measuring phase errors of an array or segmented mirror with...

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Problems solved by technology

[0011] The technical problem solved by the present invention is to overcome the shortcomings of the existing phase translation error detection technology, provide a phase translation error correction device for sparse optical synthetic aperture imaging s

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