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Design and fabrication of a large-stroke deformable mirror using a gear-shape ionic-conductive polymer metal composite.

Wei HC, Su GD - Sensors (Basel) (2012)

Bottom Line: Finally, a gear shaped IPMC actuator was designed and tested.Optical power of the IPMC deformable mirror is experimentally demonstrated to be 17 diopters with two volts.The needed voltage was about two orders lower than conventional silicon deformable mirrors and about one order lower than the liquid lens.

View Article: PubMed Central - PubMed

Affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University, No. 1, Roosevelt Road, Section 4, Taipei 10617, Taiwan. d96941017@ntu.edu.tw

ABSTRACT
Conventional camera modules with image sensors manipulate the focus or zoom by moving lenses. Although motors, such as voice-coil motors, can move the lens sets precisely, large volume, high power consumption, and long moving time are critical issues for motor-type camera modules. A deformable mirror (DM) provides a good opportunity to improve these issues. The DM is a reflective type optical component which can alter the optical power to focus the lights on the two dimensional optical image sensors. It can make the camera system operate rapidly. Ionic polymer metal composite (IPMC) is a promising electro-actuated polymer material that can be used in micromachining devices because of its large deformation with low actuation voltage. We developed a convenient simulation model based on Young's modulus and Poisson's ratio. We divided an ion exchange polymer, also known as Nafion(®), into two virtual layers in the simulation model: one was expansive and the other was contractive, caused by opposite constant surface forces on each surface of the elements. Therefore, the deformation for different IPMC shapes can be described more easily. A standard experiment of voltage vs. tip displacement was used to verify the proposed modeling. Finally, a gear shaped IPMC actuator was designed and tested. Optical power of the IPMC deformable mirror is experimentally demonstrated to be 17 diopters with two volts. The needed voltage was about two orders lower than conventional silicon deformable mirrors and about one order lower than the liquid lens.

No MeSH data available.


The laser displacement based on triangulation measurement method. (a) the triangulation measurement method; (b) the real components of the laser displacement sensor; (c) the schematic measurement setup for max tip displacement of cantilever beam shape IPMC.
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f7-sensors-12-11100: The laser displacement based on triangulation measurement method. (a) the triangulation measurement method; (b) the real components of the laser displacement sensor; (c) the schematic measurement setup for max tip displacement of cantilever beam shape IPMC.

Mentions: In the cantilever beam experiment, the length was 20 mm, the width was 5 mm, and the thickness of platinum and the half thickness of Nafion® were 10 μm and 100 μm, respectively. In this work, the constant C1 of IPMC was 60,000. The max tip displacement was measured by a homemade laser displacement sensor as shown in Figure 7. The laser displacement sensor setup in Figure 7(a) was based on a triangulation measurement method. It included a collimated laser beam source, a sensor with lens, and a motorized linear stage (KS112, Suruga, Shizuoka, Japan). The motorized linear stage was used for system calibration. Meanwhile, the displacement of a spot image on the two-dimensional sensor was transferred to the displacement of the object. Figure 7(b) shows the real components of the laser displacement sensor. The resolution of the system was approximately 0.1 mm. Figure 7(c) shows the schematic measurement setup for max tip displacement of cantilever-beam-shaped IPMC. Figure 8 shows the good agreement of experimental data and simulation result.


Design and fabrication of a large-stroke deformable mirror using a gear-shape ionic-conductive polymer metal composite.

Wei HC, Su GD - Sensors (Basel) (2012)

The laser displacement based on triangulation measurement method. (a) the triangulation measurement method; (b) the real components of the laser displacement sensor; (c) the schematic measurement setup for max tip displacement of cantilever beam shape IPMC.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472876&req=5

f7-sensors-12-11100: The laser displacement based on triangulation measurement method. (a) the triangulation measurement method; (b) the real components of the laser displacement sensor; (c) the schematic measurement setup for max tip displacement of cantilever beam shape IPMC.
Mentions: In the cantilever beam experiment, the length was 20 mm, the width was 5 mm, and the thickness of platinum and the half thickness of Nafion® were 10 μm and 100 μm, respectively. In this work, the constant C1 of IPMC was 60,000. The max tip displacement was measured by a homemade laser displacement sensor as shown in Figure 7. The laser displacement sensor setup in Figure 7(a) was based on a triangulation measurement method. It included a collimated laser beam source, a sensor with lens, and a motorized linear stage (KS112, Suruga, Shizuoka, Japan). The motorized linear stage was used for system calibration. Meanwhile, the displacement of a spot image on the two-dimensional sensor was transferred to the displacement of the object. Figure 7(b) shows the real components of the laser displacement sensor. The resolution of the system was approximately 0.1 mm. Figure 7(c) shows the schematic measurement setup for max tip displacement of cantilever-beam-shaped IPMC. Figure 8 shows the good agreement of experimental data and simulation result.

Bottom Line: Finally, a gear shaped IPMC actuator was designed and tested.Optical power of the IPMC deformable mirror is experimentally demonstrated to be 17 diopters with two volts.The needed voltage was about two orders lower than conventional silicon deformable mirrors and about one order lower than the liquid lens.

View Article: PubMed Central - PubMed

Affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University, No. 1, Roosevelt Road, Section 4, Taipei 10617, Taiwan. d96941017@ntu.edu.tw

ABSTRACT
Conventional camera modules with image sensors manipulate the focus or zoom by moving lenses. Although motors, such as voice-coil motors, can move the lens sets precisely, large volume, high power consumption, and long moving time are critical issues for motor-type camera modules. A deformable mirror (DM) provides a good opportunity to improve these issues. The DM is a reflective type optical component which can alter the optical power to focus the lights on the two dimensional optical image sensors. It can make the camera system operate rapidly. Ionic polymer metal composite (IPMC) is a promising electro-actuated polymer material that can be used in micromachining devices because of its large deformation with low actuation voltage. We developed a convenient simulation model based on Young's modulus and Poisson's ratio. We divided an ion exchange polymer, also known as Nafion(®), into two virtual layers in the simulation model: one was expansive and the other was contractive, caused by opposite constant surface forces on each surface of the elements. Therefore, the deformation for different IPMC shapes can be described more easily. A standard experiment of voltage vs. tip displacement was used to verify the proposed modeling. Finally, a gear shaped IPMC actuator was designed and tested. Optical power of the IPMC deformable mirror is experimentally demonstrated to be 17 diopters with two volts. The needed voltage was about two orders lower than conventional silicon deformable mirrors and about one order lower than the liquid lens.

No MeSH data available.