Phase errors elimination in compact digital holoscope (CDH) based on a reasonable mathematical model

• Main Authors: Wen, Yongfu, Qu, Weijuan, Cheng, Cheeyuen, Wang, Zhaomin, Asundi, Anand
• Other Authors: Quan, Chenggen
• Format: Conference or Workshop Item
• Language: English
• Published: 2018
• Subjects: Phase Error; Digital Holography; DRNTU::Engineering::Mechanical engineering
• Online Access: https://hdl.handle.net/10356/89058; http://hdl.handle.net/10220/47005
• Institution: Nanyang Technological University

In the compact digital holoscope (CDH) measurement process, theoretically, we need to ensure the distances between the reference wave and object wave to the hologram plane exactly match. However, it is not easy to realize in practice due to the human factors. This can lead to a phase error in the reconstruction result. In this paper, the strict theoretical analysis of the wavefront interference is performed to demonstrate the mathematical model of the phase error and then a phase errors elimination method is proposed based on the advanced mathematical model, which has a more explicit physical meaning. Experiments are carried out to verify the performance of the presented method and the results indicate that it is effective and allows the operator can make operation more flexible.