1 河北工业大学机械工程学院，天津 300130
2 哈德斯菲尔德大学精密技术中心，英国 西约克郡 HD1 3DH
提出了一种基于远心镜头与曲面屏的非连续镜面三维形貌测量新方法，在增加大曲率镜面成像范围的同时，提高了三维数据的测量精度。首先，在显示屏上显示标准正弦条纹图，相机分别记录经由平面参考镜和被测镜面反射的正弦条纹图像。然后，利用四步相移法和最佳三条纹选择法得到对应的相位分布值。接着，与平面参考镜比较，得到经由被测镜面物体表面调制后的相位变化。根据所建立的数学模型，推导相位与深度间对应关系，并对其系统参数进行标定。最后，对大曲率镜面和非连续镜面标准台阶进行了测量，验证了该方法的精度和有效性。
测量 远心镜头 曲面屏 相位测量偏折术 光学面形测量 激光与光电子学进展
2023, 60(7): 0724001
Author Affiliations
Abstract
1 Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
In this Letter, we present a display system based on a curved screen and parallax barrier, which provides stereo images with a horizontal field of view of 360° without wearing any eyewear, to achieve an immersive autostereoscopic effect. The display principle and characteristics of this display system are studied theoretically in detail. Three consecutive pixels on a curved screen and parallax barrier form a display unit, which can generate separate viewing zones for the left and right eyes, respectively. Simulation and experimental results show that the non-crosstalk effect can be obtained in the viewing zones, which proves the effectiveness of this display system. This study provides some new ideas for the improvement of the autostereoscopic display and to enable envisioned applications in virtual reality technology.
autostereoscopic display parallax barrier curved screen Chinese Optics Letters
2021, 19(1): 013301
