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针对利用液晶空间光调制器再现全视差计算全息体视图的过程中,再现视差图像分辨率较低的问题,提出了一种视角切片法。设定全息体视图平面与观察平面之间的距离为有限远,全息体视图上每一个全息单元由再现一个点变成再现一定宽度的视角切片。设定了视差图像、视角切片与全息单元频谱之间的对应关系,根据观察距离与全息单元尺寸计算了对应的视角切片宽度。基于液晶空间光调制器进行了全息体视图的再现实验,结果表明,视角切片法能够将再现视差图像的分辨率提高8倍,清晰地再现视差图像的细节特征。并分析了再现距离对视角切片法全息体视图再现质量的影响。
Aiming at the problem that the reconstructed parallax image has a low resolution in the process of reproducing full parallax by using liquid crystal spatial light modulator, a perspective slice method is proposed. The distance between the hologram view plane and the observation plane is set to a limited distance, and each hologram unit in the hologram view becomes a view angle slice reproducing a certain width by reproducing one point. The corresponding relationship between the parallax image, the slice of view angle and the hologram unit spectrum is set, and the corresponding slice angle of viewing angle is calculated according to the observation distance and the size of the holographic unit. The experimental results of holographic view based on liquid crystal spatial light modulator show that the view slice method can improve the resolution of reproduced parallax image by 8 times, and clearly reproduce the detail features of parallax image. The effect of reproduction distance on the reproduction quality of view holographic view was analyzed.