在二维高度倾斜的空间光调制器上进行像差校正全息投影。
Aberration-corrected holographic projection on a two-dimensionally highly tilted spatial light modulator.
作者信息
Starobrat Joanna, Wilczynska Paula, Makowski Michal
出版信息
Opt Express. 2019 Jul 8;27(14):19270-19281. doi: 10.1364/OE.27.019270.
Image projection by holographic allows efficient and compact optical setups; nevertheless, the limited throw angle and 1:1 image aspect ratio are impractical. We present the method to increase the diffractive angle of a spatial light modulator in one and two directions by introducing the highly 2-dimensionally tilted illuminating beam. The inevitable image aberrations, such as astigmatism, for off-axis imaging are corrected by proper modifications of the phase patterns on the modulator. Experimental results show the image aspect ratio of 2.4:1 suitable for human vision, with sustained image contrast and noise level. Study of the experimental diffractive efficiency is also presented.
通过全息术进行图像投影可实现高效且紧凑的光学装置；然而，有限的投射角和1:1的图像长宽比并不实用。我们提出了一种方法，通过引入高度二维倾斜的照明光束，在一个或两个方向上增加空间光调制器的衍射角。通过对调制器上的相位图案进行适当修改，可校正离轴成像中不可避免的图像像差，如像散。实验结果表明，图像长宽比为2.4:1适合人类视觉，且图像对比度和噪声水平保持稳定。同时还介绍了对实验衍射效率进行的研究。
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