Fresnel incoherent correlation hologram recording in real-time

Fresnel incoherent correlation holography (FINCH) showed its potential for three-dimensional images with super-resolution by using incoherent light sources. However, regular FINCH re-quires at least two times of holographic recording, and is not suitable for the instantaneous measurement of dynamic objects. Here, we propose the single-shot FINCH technology to realize real-time imaging. With three dual-lens patterns mixed regularly into a phase mask, the new system can capture a compound hologram, which contains three phase-shifted sub-holograms on different areas of image plane. We draw a comparison of both methods, and find it suitable for single-shot FINCH to realize holographic recording in real-time. A dice is used as a test object to record its dynamic rotational movement and holograms from different angles. We also clearly record the whole process of a drop of glue falling vertically under the force of gravity. Experi-mental results show the capability of single-shot FINCH system to record moving objects dynamically. This system provides a simple and flexible way to achieve real-time recording based on FINCH.

Automated summary

Single-shot FINCH technology utilizes three dual-lens patterns mixed into a phase mask to achieve real-time imaging of dynamic objects.