We developed compressive self-interference digital holographic approach that allows retrieving three-dimensional information of the spatially incoherent objects from single-shot captured hologram. The Fresnel incoherent correlation holography is combined with parallel phase-shifting technique to instantaneously obtain spatial-multiplexed phase-shifting holograms. The recording scheme is regarded as compressive forward sensing model, thus the compressive-sensing-based reconstruction algorithm is implemented to reconstruct the original object from the under sampled demultiplexed sub-holograms. The concept was verified by simulations and experiments with simulating use of the polarizer array. The proposed technique has great potential to be applied in 3D tracking of spatially incoherent samples.
Spatial light modulator (SLM) has various of applications in the field of imaging, beam shaping, adaptive optics and so on. While SLM is used as an aberration correction element in super-resolution microscopy, the surface flatness of SLM could affect the imaging performance of the system due to the higher sensitivity to aberrations of these kind microscopic techniques. In this paper, the optical surface flatness of SLM is measured experimentally by employing the image plane digital holography. The topography of SLM is retrieved from the captured hologram. Aiming to the application of SLM as an adaptive correction element in super resolution microscopy, the aberrations introduced by the surface flatness of SLM are further evaluated and corrected in the same optical system.
Self-interference digital holography enables holographic recording of object illuminated with spatially incoherent light. While Fresnel incoherent correlation holography (FINCH) has great potential in super-resolution microscopic imaging, structured illumination can be implemented simultaneously to further improve the imaging resolution. In this paper, the imaging characteristics of FINCH with structured illumination are investigated in detail. The basic principle of FINCH with structured illumination is discussed. Effects of characteristics of structured light pattern, such as the period, orientation and modulation depth on lateral-resolution are investigated. The potential of structured illuminated FINCH in three-dimensional super-resolution imaging was demonstrated in the paper.
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