Effect of large deflection angle on the laser intensity profile produced by acousto-optic deflector scanners in high precision manufacturing

2016 ◽  
Vol 28 (1) ◽  
pp. 012012 ◽  
Author(s):  
Tiansi Wang ◽  
Chong Zhang ◽  
Aleksandar Aleksov ◽  
Islam Salama ◽  
Aravinda Kar
Keyword(s):  
High Precision ◽  
Large Deflection ◽  
Deflection Angle ◽  
Laser Intensity ◽  
Intensity Profile ◽  
Precision Manufacturing

Effects of the Laser Intensity Profile on Ignition of Hydrogen-Air Mixture

2021 ◽  
Author(s):  
Albina Tropina ◽  
Sagar Pokharel ◽  
Mikhail N. Shneider
Keyword(s):  
Laser Intensity ◽  
Intensity Profile

Modular and reconfigurable desktop microfactory for high precision manufacturing

2016 ◽  
Vol 90 (9-12) ◽  
pp. 3749-3759 ◽  
Author(s):  
Zhenishbek Zhakypov ◽  
Tarik Uzunovic ◽  
Ahmet Ozcan Nergiz ◽  
Eray A. Baran ◽  
Edin Golubovic ◽  
...  
Keyword(s):  
High Precision ◽  
Precision Manufacturing

Self-Calibration of XY-Stage with Parallel Mechanism

2014 ◽  
Vol 590 ◽  
pp. 126-129
Author(s):  
Ryoshu Furutani ◽  
Satoshi Yokouchi ◽  
Miyu Ozaki
Keyword(s):  
High Precision ◽  
Parallel Mechanism ◽  
Least Squares Method ◽  
Calibration Method ◽  
Measuring Instruments ◽  
Precision Manufacturing ◽  
Kinematic Parameters ◽  
Self Calibration ◽  
Simulation And Experiment ◽  
Experimental Process

It is important to calibrate the straightness and the squareness of the XY-stage for precision manufacturing and measurement. Normally it is calibrated using much higher precise and accurate measuring instruments and/or artifacts. The high precision and accurate instruments and artifacts are expensive. So, in this paper, Self-calibration method is applied to XY-stage. This method does not require any much high precision and accurate instruments and artifacts. The normal XY-stage moves to the location at the unique coordinates. In this case, it is difficult to apply self-calibration method. Therefore, XY-stage is expanded to XYθ-stage with parallel mechanism. As this stage moves to the location at a lot of coordinates, self-calibration method is applied. This method is confirmed in simulation and experiment. In simulation, the extension lengths of mechanism are estimated from known kinematic parameters and the target coordinates. After that, estimated kinematic parameters are calculated by least-squares method from the extension lengths and the target coordinates. Finally, the positioning coordinates are calculated from the estimated kinematic parameters and the extension lengths. It is proved that the calibration method is effective by comparing the target coordinates and the positioning coordinates. In experiment, the experimental process is similar to the simulation without the estimation of extension lengths. The results of simulation and experiment are shown in this paper.

A Piezoelectrically Actuated Scaning Micromirror Integrated with Angle Sensors

2011 ◽  
Vol 483 ◽  
pp. 437-442 ◽  
Author(s):  
Rong Rong Qian ◽  
Zhi Yu Wen ◽  
Li Chen
Keyword(s):  
Large Deflection ◽  
Deflection Angle ◽  
Maximum Output ◽  
Angle Sensor ◽  
Torsional Mode ◽  
Optical Scanning ◽  
Large Size ◽  
Simulation Results ◽  
Piezoelectric Cantilevers ◽  
Scanning Systems

A novel piezoelectrically actuated scanning micromirror integrated with angle sensors is presented. The mirror with large size of 3×3mm2 locates in the center of the device, and piezoelectric actuators are symmetrically placed on both sides of the mirror. They are connected through torsion bars in which piezoelectric angle sensors are integrated. In order to obtain large deflection angle at a low operation voltage, the new actuator consisting of several parallel piezoelectric cantilevers is adopted. The machematical models of the mirror and piezoelectric actuator are given, and the piezoelectric angle sensors are designed to obtain high sensitivities. The simulation results indicate that the maximum mechanical deflection angle of the micromirror is 12.4° at an operation voltage of 25V, and the maximum output voltage of the angle sensor is 164.3mV. The resonant frequency associated with the torsional mode is 960Hz. The sensitivity of the angle sensor is 13.3mV/° without amplifying. The Scanning miromirror is suitable for optical scanning systems such as the microscope, the micro-spectrometer, the medical imaging, the barcode reader and so on.

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