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Effect of masking phase-only holograms on the quality of reconstructed images

机译：屏蔽仅相位全息图对重构图像质量的影响

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A phase-only hologram modulates the phase of the incident light and diffracts it efficiently with low energy loss because of the minimum absorption. Much research attention has been focused on how to generate phase-only holograms, and little work has been done to understand the effect and limitation of their partial implementation, possibly due to physical defects and constraints, in particular as in the practical situations where a phase-only hologram is confined or needs to be sliced or tiled. The present study simulates the effect of masking phase-only holograms on the quality of reconstructed images in three different scenarios with different filling factors, filling positions, and illumination intensity profiles. Quantitative analysis confirms that the width of the image point spread function becomes wider and the image quality decreases, as expected, when the filling factor decreases, and the image quality remains the same for different filling positions as well. The width of the image point spread function as derived from different filling factors shows a consistent behavior to that as measured directly from the reconstructed image, especially as the filling factor becomes small. Finally, mask profiles of different shapes and intensity distributions are shown to have more complicated effects on the image point spread function, which in turn affects the quality and textures of the reconstructed image. (C) 2016 Optical Society of America
机译：纯相位全息图调制入射光的相位，并由于最小的吸收而以低能量损耗有效地衍射。大量的研究注意力都集中在如何生成仅相位全息图上，并且几乎没有做任何工作来理解其部分实现的效果和局限性，这可能是由于物理缺陷和约束所致，特别是在实际情况下-仅全息图被限制或需要切片或平铺。本研究模拟了在不同填充因子，填充位置和照明强度轮廓的三种不同情况下，仅掩盖纯相位全息图对重建图像质量的影响。定量分析证实，当填充因子减小时，像点扩展函数的宽度变宽，并且图像质量下降，如预期的那样，并且对于不同的填充位置，图像质量也保持相同。从不同的填充因子得出的图像点扩散函数的宽度表现出与直接从重建图像测量的一致的行为，尤其是当填充因子变小时。最后，显示出具有不同形状和强度分布的蒙版轮廓对图像点扩散函数具有更复杂的影响，进而影响重建图像的质量和纹理。 （C）2016美国眼镜学会

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