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A two-dimensional laser scanning mirror using motion-decoupling electromagnetic actuators.

Shin BH, Oh D, Lee SY - Sensors (Basel) (2013)

Bottom Line: The upper moving-coil type actuator to rotate only the mirror part has the optical reflection angle of 15.7° at 10 Hz, 90° at the resonance frequency of 60 Hz at ±3 V (±70 mA) and the bandwidth of 91 Hz.The lower moving-magnet type actuator has the optical reflection angle of 16.20° at 10 Hz and 50° at the resonance frequency of 60 Hz at ±5 V (±34 mA) and the bandwidth of 88 Hz.The proposed compact and simple 2-D scanning mirror has advantages of large 2-D angular deflections, wide frequency bandwidth and low manufacturing cost.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, Sogang University, 1 Shinsu-dong, Mapo-gu, Seoul 121-742, Korea.

ABSTRACT
This work proposes a two-dimensional (2-D) laser scanning mirror with a novel actuating structure composed of one magnet and two coils. The mirror-actuating device generates decoupled scanning motions about two orthogonal axes by combining two electromagnetic actuators of the conventional moving-coil and the moving-magnet types. We implement a finite element analysis to calculate magnetic flux in the electromagnetic system and experiments using a prototype with the overall size of 22 mm (W) × 20 mm (D) × 15 mm (H) for the mirror size of 8 mm × 8 mm. The upper moving-coil type actuator to rotate only the mirror part has the optical reflection angle of 15.7° at 10 Hz, 90° at the resonance frequency of 60 Hz at ±3 V (±70 mA) and the bandwidth of 91 Hz. The lower moving-magnet type actuator has the optical reflection angle of 16.20° at 10 Hz and 50° at the resonance frequency of 60 Hz at ±5 V (±34 mA) and the bandwidth of 88 Hz. The proposed compact and simple 2-D scanning mirror has advantages of large 2-D angular deflections, wide frequency bandwidth and low manufacturing cost.

No MeSH data available.


Related in: MedlinePlus

Laser beam profiles by the 2-D scanning mirror actuator with input voltages of ±3 V at X-axis and ±5 V at Y-axis. (a) circle profile by the driving frequency of 80 Hz at each axis, (b) line profile by 80 Hz at each axis, (c) 100 Hz at X-axis and 10 Hz at Y-axis, (d) 10 Hz at X-axis and 100 Hz at Y-axis.
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f9-sensors-13-04146: Laser beam profiles by the 2-D scanning mirror actuator with input voltages of ±3 V at X-axis and ±5 V at Y-axis. (a) circle profile by the driving frequency of 80 Hz at each axis, (b) line profile by 80 Hz at each axis, (c) 100 Hz at X-axis and 10 Hz at Y-axis, (d) 10 Hz at X-axis and 100 Hz at Y-axis.

Mentions: Figure 9(a,b) shows the 2-D scanning profiles of laser beam when both actuators are driven by input voltages of ±3 V at X-axis and ±5 V at Y-axis. They show the circle and line patterns of laser beam when the same driving frequencies are applied. There is no hysteretic motion in the line pattern, indicating that the motion-decoupling actuators cause independent 2-D motions of the mirror scanning system. Figure 9(c,d) indicates that the scanning mirror actuator can follow various driving patterns.


A two-dimensional laser scanning mirror using motion-decoupling electromagnetic actuators.

Shin BH, Oh D, Lee SY - Sensors (Basel) (2013)

Laser beam profiles by the 2-D scanning mirror actuator with input voltages of ±3 V at X-axis and ±5 V at Y-axis. (a) circle profile by the driving frequency of 80 Hz at each axis, (b) line profile by 80 Hz at each axis, (c) 100 Hz at X-axis and 10 Hz at Y-axis, (d) 10 Hz at X-axis and 100 Hz at Y-axis.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3673076&req=5

f9-sensors-13-04146: Laser beam profiles by the 2-D scanning mirror actuator with input voltages of ±3 V at X-axis and ±5 V at Y-axis. (a) circle profile by the driving frequency of 80 Hz at each axis, (b) line profile by 80 Hz at each axis, (c) 100 Hz at X-axis and 10 Hz at Y-axis, (d) 10 Hz at X-axis and 100 Hz at Y-axis.
Mentions: Figure 9(a,b) shows the 2-D scanning profiles of laser beam when both actuators are driven by input voltages of ±3 V at X-axis and ±5 V at Y-axis. They show the circle and line patterns of laser beam when the same driving frequencies are applied. There is no hysteretic motion in the line pattern, indicating that the motion-decoupling actuators cause independent 2-D motions of the mirror scanning system. Figure 9(c,d) indicates that the scanning mirror actuator can follow various driving patterns.

Bottom Line: The upper moving-coil type actuator to rotate only the mirror part has the optical reflection angle of 15.7° at 10 Hz, 90° at the resonance frequency of 60 Hz at ±3 V (±70 mA) and the bandwidth of 91 Hz.The lower moving-magnet type actuator has the optical reflection angle of 16.20° at 10 Hz and 50° at the resonance frequency of 60 Hz at ±5 V (±34 mA) and the bandwidth of 88 Hz.The proposed compact and simple 2-D scanning mirror has advantages of large 2-D angular deflections, wide frequency bandwidth and low manufacturing cost.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, Sogang University, 1 Shinsu-dong, Mapo-gu, Seoul 121-742, Korea.

ABSTRACT
This work proposes a two-dimensional (2-D) laser scanning mirror with a novel actuating structure composed of one magnet and two coils. The mirror-actuating device generates decoupled scanning motions about two orthogonal axes by combining two electromagnetic actuators of the conventional moving-coil and the moving-magnet types. We implement a finite element analysis to calculate magnetic flux in the electromagnetic system and experiments using a prototype with the overall size of 22 mm (W) × 20 mm (D) × 15 mm (H) for the mirror size of 8 mm × 8 mm. The upper moving-coil type actuator to rotate only the mirror part has the optical reflection angle of 15.7° at 10 Hz, 90° at the resonance frequency of 60 Hz at ±3 V (±70 mA) and the bandwidth of 91 Hz. The lower moving-magnet type actuator has the optical reflection angle of 16.20° at 10 Hz and 50° at the resonance frequency of 60 Hz at ±5 V (±34 mA) and the bandwidth of 88 Hz. The proposed compact and simple 2-D scanning mirror has advantages of large 2-D angular deflections, wide frequency bandwidth and low manufacturing cost.

No MeSH data available.


Related in: MedlinePlus