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Design and Fabrication of a Large-Stroke Deformable Mirror Using a Gear-Shape Ionic-Conductive Polymer Metal Composite

機(jī)譯：齒輪形狀的離子導(dǎo)電聚合物金屬?gòu)?fù)合材料的大行程可變形鏡的設(shè)計(jì)與制作

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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.
機(jī)譯：具有圖像傳感器的傳統(tǒng)相機(jī)模塊通過(guò)移動(dòng)鏡頭來(lái)控制焦點(diǎn)或變焦。盡管諸如音圈電動(dòng)機(jī)之類的電動(dòng)機(jī)可以精確移動(dòng)鏡頭組，但是對(duì)于電動(dòng)機(jī)型相機(jī)模塊而言，大體積，高功耗和長(zhǎng)移動(dòng)時(shí)間是關(guān)鍵問(wèn)題?？勺冃午R（DM）提供了一個(gè)很好的機(jī)會(huì)來(lái)改善這些問(wèn)題。 DM是反射型光學(xué)組件，其可以改變光功率以將光聚焦在二維光學(xué)圖像傳感器上。它可以使相機(jī)系統(tǒng)快速運(yùn)行。離子聚合物金屬?gòu)?fù)合材料（IPMC）是一種有前途的電驅(qū)動(dòng)聚合物材料，由于其變形大且驅(qū)動(dòng)電壓低，因此可用于微加工設(shè)備。我們基于楊氏模量和泊松比開發(fā)了一個(gè)方便的仿真模型。在模擬模型中，我們將離子交換聚合物（也稱為Nafion ?）分為兩個(gè)虛擬層：一個(gè)是膨脹層，另一個(gè)是收縮層，這是由于元素每個(gè)表面上相反的恒定表面力引起的。因此，可以更容易地描述不同IPMC形狀的變形。電壓與尖端位移的標(biāo)準(zhǔn)實(shí)驗(yàn)用于驗(yàn)證所提出的模型。最后，設(shè)計(jì)并測(cè)試了齒輪狀I(lǐng)PMC執(zhí)行器。實(shí)驗(yàn)證明IPMC變形鏡的光焦度為17屈光度，電壓為2伏。所需的電壓比常規(guī)的硅可變形反射鏡低約兩個(gè)數(shù)量級(jí)，比液體透鏡低約一個(gè)數(shù)量級(jí)。

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