Voice coil motor used for large-aperture adaptive deformable mirror

Abstract

The invention provides a voice coil motor used for a large-aperture adaptive deformable mirror. A cylindrical coil is arranged. A tiny gap is formed between the top of the cylindrical coil and a magnet. A soft iron shell is arranged on the exteriors of the magnet and the central shaft. The voice coil motor is of a moving iron type structure and is characterized in that the cylindrical coil is installed in the soft iron shell at the bottom; the cylindrical coil and a mirror plane isolation permanent magnet are arranged in a position which is arranged in the axial direction of the cylindrical coil and are directly adhered to and fixed to the mirror plane of an astronomical telescope. According to the invention, the radial size and the occupied space of the voice coil motor are reduced; traditional hidden risks of short-circuit faults are eliminated; mover quality and movement inertia are reduced; effects on the mirror plane imposed by heating of the coil of the voice coil motor are overcome; through design of optimized magnetic fields, the voice coil motor has quite high motor efficiency; quite big pushing force can be achieved through high frequency small current; the electromagnetic force can reach 1N or over and reaches 0.6 N; the efficiency of the motor reaches 0.45N / W; and requirements of the large-aperture adaptive deformable mirror can be met.

Description

technical field [0001] The invention relates to a voice coil motor used for a large-diameter adaptive deformable mirror. Background technique [0002] In order to explore the deeper universe, the aperture of modern ground-based telescopes is becoming larger and larger. In order to reduce the impact of atmospheric turbulence on imaging, in 1953, Huris Baibcock of Haier Observatory proposed the concept of adaptive optics, through the telescope The exit pupil is equipped with a wavefront correction device to correct the wavefront error caused by atmospheric disturbance. This device for correcting the wavefront is an adaptive deformable mirror. The adaptive optics system measures the wavefront change on the focal plane of the telescope in real time. , and real-time compensation through adaptive deformable mirrors to eliminate the influence of atmospheric turbulence; in the 1990s, a new type of adaptive optics system that used the secondary mirror of the telescope as a wavefront ...

AI Technical Summary

Problems solved by technology

The present invention will overcome the above-mentioned shortcomings of the prior art: reduce the radial size and space occupation of the voice coil motor, eliminate the short-circuit fault of the moving-coil voice coil motor when the coil moves rapidly and at high frequencies, reduce the quality of the voice coil motor mover and The motion inertia overcomes the influence of voice coil motor coil heating on the mirror surface. Through optimized design, the designed motor of the present invention has high motor efficiency and can achieve greater driving force through high frequency and small current

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