Abstract In the field of imaging, it is required to control the dynamic range by darkening of the overexposed parts of a scene. Up to now, conventional one-dimensional graduated filters with a fixed transmission profile are used. Making use of electrochromic materials, we present a tunable electrochromic graduated filter device with two-dimensional control. It combines multiple conventional filters in one device as its continuous transmission profile can be individually translated, rotated, stretched and adapted in absorption by means of a multiple electrode configuration. To calculate the spatial transmission and the required potential combination for the control electrodes, we establish a Finite Element Method based simulation model considering the non-linear transmission-potential response of our complementary electrochromic materials. We simulate several electrode configurations and optimize them for the highest correlation of specified and simulated transmission. Finally, we build the device using microsystem technology and demonstrate the successful operation with desired functionalities.

中文翻译：

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使用具有多电极配置的电致变色渐变滤波器进行二维空间图像控制

摘要 在成像领域，需要通过使场景中曝光过度的部分变暗来控制动态范围。到目前为止，使用具有固定透射分布的常规一维渐变滤波器。利用电致变色材料，我们提出了一种二维控制的可调电致变色渐变滤光片装置。它在一个设备中结合了多个传统滤波器，因为它的连续透射曲线可以通过多电极配置单独平移、旋转、拉伸和适应吸收。为了计算控制电极的空间传输和所需的电位组合，我们建立了一个基于有限元方法的模拟模型，考虑到我们的互补电致变色材料的非线性传输电位响应。我们模拟几种电极配置并优化它们以获得指定和模拟传输的最高相关性。最后，我们使用微系统技术构建设备并演示具有所需功能的成功操作。