针孔阵列厚度对集成成像3D显示观看视角的影响
Effect of Thickness of Pinhole Array on Viewing Angle of Integral Imaging 3D Display
作者：吴非(成都工业学院 电子工程学院, 四川 成都 611730;电子科技大学 光电信息学院, 四川 成都 610054)；王琼华(四川大学 电子信息学院, 四川 成都 610065)；吕国皎(成都工业学院 电子工程学院, 四川 成都 611730;四川大学 电子信息学院, 四川 成都 610065)；赵百川(成都工业学院 电子工程学院, 四川 成都 611730;四川大学 电子信息学院, 四川 成都 610065)；邓欢(四川大学 电子信息学院, 四川 成都 610065)
Author：WU Fei(College of Electronics Eng., Chengdu Technol. Univ., Chengdu 611730, China;School of Optoelectronic Info., Univ. of Electronic Sci. and Technol. of China, Chengdu 610054, China)；WANG Qionghua(College of Electronics and Info. Eng., Sichuan Univ., Chengdu 610065, China)；LYU Guojiao(College of Electronics Eng., Chengdu Technol. Univ., Chengdu 611730, China;College of Electronics and Info. Eng., Sichuan Univ., Chengdu 610065, China)；ZHAO Baichuan(College of Electronics Eng., Chengdu Technol. Univ., Chengdu 611730, China;College of Electronics and Info. Eng., Sichuan Univ., Chengdu 610065, China)；DENG Huan(College of Electronics and Info. Eng., Sichuan Univ., Chengdu 610065, China)
收稿日期：2016-04-22 年卷（期）页码：2017,49(2):186-189
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：集成成像;针孔阵列;厚度;观看视角
Key words：integral imaging;pinhole array;thickness;viewing angle
基金项目：国家自然科学基金资助项目（61405129）；中国博士后科学基金资助项目（2016M592650）；四川省应用基础面上项目资助（2017JY0173）
中文摘要
基于针孔阵列的集成成像3D显示具有成本低，重量小，器件厚度薄，易于实现3D/2D转换等优点。针孔阵列的参数设计是集成成像3D显示器结构设计的关键之一。3D观看视角是集成成像3D显示的关键性能参数之一。本文研究针孔阵列的厚度对3D观看视角的影响。根据针孔阵列厚度与孔径宽度的3种取值关系，分别建立3种集成成像3D成像模型，然后根据几何光学分别计算不同成像模型的3D观看视角，并研制了集成成像3D显示测试装置。实验结果表明针孔阵列厚度存在最优值，且只取决于图像元节距、针孔孔径宽度以及针孔阵列与显示面板的间距。针孔阵列厚度取最优值时，显示面板上每个图像元中所有像素发出的光线都可以通过其对应的针孔，且每个图像元中像素发出的光线都不能通过其他针孔，因此3D观看视角最大，且没有串扰图像。针孔阵列厚度小于最优值时，显示面板上每个图像元中所有像素发出的光线都可以通过其对应的针孔，但是每个图像元中部分像素发出的光线可以通过其他针孔，因此3D观看视角不变，但是会产生串扰图像，且串扰与针孔阵列的厚度成反比。针孔阵列厚度大于最优值时，每个图像元中只有部分像素发出的光线可以通过其对应的针孔，虽然没有串扰图像，但是3D观看视角变小，且与针孔阵列厚度的厚度成反比。
英文摘要
Compared with the integral imaging (Ⅱ) display based on the micro-lens array,the Ⅱ display based on the pinhole array has lower cost,lower weight,and thinner thickness.Moreover,the Ⅱ display based on the pinhole array is easy to realize a 3D/2D convertible display.The parameter design of pinhole array is one of the most important keys to design the Ⅱ display based on the pinhole array.The 3D viewing angle is also one of the most important parameters in the Ⅱ display based on the pinhole array.The effect of thickness of pinhole array on 3D viewing angle in the Ⅱ display was analyzed.According to the relationships between the aperture width and the thickness of the pinhole array,three imaging models of the Ⅱ display were established firstly.Then,three calculation formulas of the 3D viewing angle of the Ⅱ display were obtained through geometrical optics.Lately,a testing equipment of the Ⅱ display based on the pinhole array was developed.The experiment results proved the optimal thickness of the pinhole array was related to the pitch of the elemental image,the width of the pinhole and the distance between the pinhole array and the display panel.When the thickness of the pinhole array was equal to the optimal value,lights emitted from all pixels of each elemental image on the display panel were only modulated by the assigned pinhole.Thus,the maximum 3D viewing angle was obtained without crosstalk.When the thickness of the pinhole array was smaller than the optimal value,lights emitted from all pixels of each elemental image on the display panel were modulated by the assigned pinhole,and lights emitted from parts of pixels of each elemental image on the display panel were also modulated by the other pinholes.Thus,the maximum 3D viewing angle was obtained with crosstalk.When the thickness was larger than the optimal value,lights emitted from parts of pixels of each elemental image on the display panel were modulated by the assigned pinhole.Accordingly,the 3D viewing angle was decreased and inversely proportional to the thickness of the pinhole array.
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