Ultrahigh-speed laser rotating scan mirror

Abstract

The invention relates to an ultrahigh-speed laser rotating scan mirror and belongs to the technical field of laser rotating scan mirrors. The ultrahigh-speed laser rotating scan mirror comprises a mirror casing, and a magnetic levitation motor, a rotating multi-face scanning mirror, a magnetic levitation bearing and a bearing support plate are arranged in the mirror casing. The rotating multi-face scanning mirror is sleeved on an output shaft of the magnetic levitation motor to complete interference fit. The magnetic levitation bearing located below the rotating multi-face scanning mirror is sleeved on the output shaft, the bearing support plate is sleeved on the magnetic levitation bearing, and an outer edge of the bearing support plate is fixedly connected with the mirror casing. The ultrahigh-speed laser rotating scan mirror has the advantages of being capable of achieving ultrahigh-speed laser rotating scanning, enabling rotating speed of the scan mirror to achieve 300000 circles / minutes to 2000000 circles / minutes, and accordingly enabling scanning speed of the ultrahigh-speed laser rotating scan mirror to improve 10-200 times compared with the prior art when the ultrahigh-speed laser rotating scan mirror is used in the technical fields such as laser radars, laser three-dimensional mopping, laser printers, laser phototypesetting printing, laser storing and laser marking.

Description

technical field [0001] The invention relates to the technical field of laser scanning mirrors, in particular to an ultra-high-speed laser rotating scanning mirror. Background technique [0002] At the beginning of the advent of laser technology, some people used rotating multi-faceted scanning mirrors to deflect and scan the laser beam. This technology was later applied to laser radar, laser three-dimensional mapping, laser printers, laser phototypesetting, laser storage, laser marking, laser display, etc. On devices that require laser beam scanning, but when it is necessary to further improve the performance of the above applications, the rotating polygon scanning mirror needs to greatly increase the rotation speed to achieve it. For example, laser deflection projection TV needs to rotate the multi-faceted scanning mirror at a speed of 300,000 rpm. In addition, when converting high-definition TV and computer images, it needs to rotate the polygonal scanning mirror at a spee...

AI Technical Summary

Problems solved by technology

However, the rotation speed of the rotating polygonal scanning mirror is determined by the motor and bearings, and the existing motor speed is difficult to exceed 80,000 rpm

Because the existing motors and bearings are rotating in contact with metal friction and air friction, the temperature of the motor will be too high when rotating at high speed, and the motor will be damaged, which greatly restricts the application of this technology

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