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The authors describe three-dimensional (3D) motion pictures of dynamic micro objects obtained by parallel phase-shifting digital holographic microscope. The microscope consisted of a Mach-Zehnder interferometer, an inverted magnification optical system, a continuous wave laser, and a polarization imaging camera. An alum crystal sinking in aqueous solution of alum was set for a dynamic micro object...
Fluorescence imaging is one of the important tools for biological field. For three-dimensional (3D) visualization of the fluorescence, we present two approaches. One is the common-path off-axis incoherent digital holography using dual gratings on dual Fresnel lenses. The other method is the image recovery of a defocused 2D fluorescence image by using the defocused distance obtained from the 3D phase...
We describe several techniques for phase-shifting digital holography based on single-pixel detection and microstructured illumination. In particular, we present a high-speed holographic system based on a Mach-Zehnder interferometer that uses a digital micromirror device (DMD) to sample the object with a sequence of phase patterns. The DMD is also used for phase shifting and for wavefront correction...
Compressive sensing may be particularly beneficial for multidimensional imaging. In this paper we overview techniques developed for 3D and 4D compressive imaging. We briefly discuss implementation issues and possible solutions.
Film-based cameras were replaced with digital cameras in a very short period. Saving film costs for each shot is not only of advantage of this transition. The more important advantage by this digitization is that forming optically a completed image on detector is not necessary and acquired data are processable by a computer. We can think that, with optional optical system-lens array-, acquired data...
In recent years, the optical storage and optical information processing technologies based on holographic and photonic techniques are suffering a huge improvement. On the other hand, Spatial Light Modulators (SLMs) based on LCoS microdisplays (PA-LCoS) open new possibilities to modulate the wavefront of a light beam. PA-LCoS are high resolution reflective devices which make possible the generation...
Multimodal imaging in biology plays an important role. So far the 3D visualization of fluorescence is realized by scanning systems. For faster imaging, the sectioning process intrinsically exhibits limitations in recording speed. We presented common-path off-axis incoherent digital holography using dual gratings on dual Fresnel lenses. Using the proposed method, single-shot, 3D fluorescence imaging...
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