Capturing videos at 60 frames per second using incoherent digital holography

The three-dimensional information of an object can be obtained under low coherent light through incoherent digital holography (IDH). In the spatially parallel phase-shifting method by the geometric phase, the IDH optical setup using a diffractive lens can cause noise due to high-order diffracted and scattered light. Therefore, we constructed an IDH optical setup using a Michelson interferometer without a diffractive lens. We investigated the relationship between the focal length of the concave mirror in the interferometer and the resolution of the reconstructed image. The resolution could be improved by shortening the focal length. Furthermore, we confirmed that the motion blur in the IDH is consistent with the conventional two-dimensional imaging system, and demonstrated that videos could be captured at 60 fps. (c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement