| 基于4f系统的数字全息表面三维形貌恢复技术 |
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| 引用本文： | 葛宝臻,邹瑾,吕且妮.基于4f系统的数字全息表面三维形貌恢复技术[J].天津大学学报(自然科学与工程技术版),2006,39(6):712-716. |
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| 作者姓名： | 葛宝臻 邹瑾 吕且妮 |
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| 作者单位： | 天津大学精密仪器与光电子工程学院,光电信息技术科学教育部重点实验室,天津300072 |
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| 基金项目： | 高等学校博士学科点专项科研项目 |
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| 摘 要： | 提出一种用于表面三维形貌恢复的数字全息显微方法．通过记录经4f系统放大的物体实像的离轴菲涅尔数字全息图，由数字再现技术获得物体的放大像，由此计算出物体相位反差像，从而得到物体的微观形貌．实验结果表明当物体位于4f系统的前焦面时，可以消除相位信息中的附加相位因子，不需相位补偿即可获得准确的表面三维形貌信息．
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| 关 键 词： | 数字全息 4f系统 三维形貌 |
| 文章编号： | 0493-2137（2006）06-0712-05 |
| 收稿时间： | 2005-03-15 |
| 修稿时间： | 2005-03-152006-01-05 |
Surface Morphometry by Digital Holography Based on 4f System |
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| GE Bao-zhen,ZOU Jin,L Qie-ni.Surface Morphometry by Digital Holography Based on 4f System[J].Journal of Tianjin University(Science and Technology),2006,39(6):712-716. |
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| Authors: | GE Bao-zhen ZOU Jin L Qie-ni |
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| Institution: | Key Laboratory of Opto-Electronics Information and Technical Science of Ministry of Education, School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | A digital holographic microscopy of surface morphometry is proposed. Off-axis Fresnel holograms recorded with a magnified image, which is obtained by using a 4f system, are numerically reconstructed. Then the surface map can be traced out according to the phase-contrast image. The experimental set-up is designed, and the results show that when the object is located in the front focal plane of 4f system, the accurate surface features can be computed directly without the correction of phase aberrations. |
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| Keywords: | digital holography 4f system surface morphometry |
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