Abstract
In order to improve the quality of the laser and shorten the optical path of the fast steering mirror (FSM) laser compensation system, this paper proposes a four-degrees-of-freedom (4-DOF) voice coil motor (VCM) with the function of reducing laser geometrical fluctuations. The feature of this paper is the combination of a DC brushed spindle motor and the proposed 4-DOF VCM. A diffuser is installed on the shaft of the DC brushed motor for suppressing the laser speckle. The proposed 4-DOF VCM is combined with a laboratory-designed mirror set, controlling the laser direction to compensate for laser fluctuations. The proposed actuator was designed and verified by using the commercial CAD software SolidWorks and finite element analysis (FEA) software ANSYS. A mathematical model was built to simulate the dynamic response of the proposed 4-DOF VCM in MATLAB Simulink.
Highlights
Motor with Function of ReducingLasers are widely used in numerous fields, such as manufacturing, precision measurement, and even cosmetic surgery
According to our previous studies, we have presented a new fast steering mirror (FSM) compensation system with double Porro prisms to compensate for the 4 DOF laser errors of the laser source, which is chacterized by shorter optical path length, fewer elements, and easier setup at different locations [22,23]
Based on the above advance, in this paper, we aim to design a 4-DOF voice coil motor (VCM), which is combined with a specific mirror set to suppress laser 4-DOF fluctuations and shorten the optical path of the FSM laser compensation system [22,23]
Summary
Motor with Function of ReducingLasers are widely used in numerous fields, such as manufacturing, precision measurement, and even cosmetic surgery. In the process of compensation, the system first measures fluctuations through the sensors, and controls the actuators to drive the mirror, changing the laser direction to complete the laser compensation. The voice coil motor (VCM) is the most common actuator in FSMs. VCM has the advantages of low cost, simple structure, and fast response. To the best of our knowledge, the commercial FSM has only 2-DOF, driving the mirror and steering the laser in rotational motion along the X and Y axes [21]. According to our previous studies, we have presented a new FSM compensation system with double Porro prisms to compensate for the 4 DOF laser errors of the laser source, which is chacterized by shorter optical path length, fewer elements, and easier setup at different locations [22,23].
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