Askari Mehdi, Park Jae-Hyeung
Opt Express. 2020 Jan 6;28(1):146-159. doi: 10.1364/OE.381282.
Holographic projection displays suffer from image blur when reconstructed from an incoherent light source like a light emitting diode. In this paper, we propose a method that enhances the reconstruction sharpness by pre-compensating the target image. The image blur caused by the incoherent nature of the light emitting diode is analyzed and the corresponding spatially varying point spread function is obtained. The pre-compensation is then performed using an iterative optimization algorithm. Finally, the hologram of the pre-compensated target image is loaded onto a spatial light modulator to obtain optically reconstructed image with reduced blur. The numerically simulated results and optically reconstructed results are in good agreement, showing feasibility of the proposed method.
当从诸如发光二极管这样的非相干光源进行重建时，全息投影显示会出现图像模糊的问题。在本文中，我们提出了一种通过对目标图像进行预补偿来提高重建清晰度的方法。分析了由发光二极管的非相干特性引起的图像模糊，并获得了相应的空间变化点扩散函数。然后使用迭代优化算法进行预补偿。最后，将预补偿后的目标图像的全息图加载到空间光调制器上，以获得模糊度降低的光学重建图像。数值模拟结果与光学重建结果吻合良好，表明了该方法的可行性。
