Opt Express. 2022 Jan 17;30(2):2078-2088. doi: 10.1364/OE.448262.
A foveated display is a technology that can solve the problem of insufficient angular resolution (relative to the human eye) for near-eye display. In a high-resolution foveated display, a beam steering element is required to track the human gaze. An electrowetting prism array is a transmissive non-mechanical beam steering device, that allows a light and compact optical system to be configured and a large aperture possible. However, the view is obstructed by the sidewall of the prism array. When the size of the cell prism is 7mm, the prism array has an 87% fill-factor. To push the fill-factor to 100%, the cell prisms were magnified using a lens array. Image processing was performed such that the image produced by the lens array was identical to the original. Beam steering by refraction is accompanied by chromatic dispersion, which causes chromatic aberration, making colors appear blurry. The refractive index condition to reduce chromatic dispersion was obtained using the doublet structure of the electrowetting prism. The chromatic dispersion was reduced by 70% on average.
注视点显示技术可以解决近眼显示中角分辨率（相对于人眼）不足的问题。在高分辨率注视点显示中，需要光束转向元件来跟踪人眼注视。电润湿棱镜阵列是一种透射式非机械光束转向装置，它允许配置轻巧紧凑的光学系统，并实现大孔径。然而，棱镜阵列的侧壁会阻碍视线。当单元棱镜的尺寸为 7mm 时，棱镜阵列的填充因子为 87%。为了将填充因子提高到 100%，使用透镜阵列放大单元棱镜。通过图像处理，使透镜阵列产生的图像与原始图像相同。折射式光束转向伴随着色差，这会导致色像差，使颜色看起来模糊。通过使用电润湿棱镜的双合结构获得了减少色差的折射率条件。平均减少了 70%的色差。
