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In this paper we introduce a digital holographic technique called optical scanning holography (OSH). In OSH, the object to be measured is raster scanned by a pre-generated time-varying interference pattern. In addition, a single-pixel detector instead of an arrayed detector is used to acquire the hologram data. By using heterodyne technique in conjunction with synchronous demodulation, a complex hologram...
We discuss and demonstrate our recent developments using self-interference incoherent digital holography to bridge the gap between indispensable incoherent imaging techniques and the advantages of three-dimensional holographic recording. We demonstrate the ability to record broadband sunlit photographic holograms, apply non-invasive three-dimensional tracking techniques, and the ease of adaptation...
Digital holography can serve as an effective tool for imaging three-dimensional scenes or objects, quickly and reliably. In this paper, recently developed methods of self-reference single channel digital holography are reviewed: Fresnel incoherent correlation holography (FINCH), Fourier incoherent single channel holography (FISCH), and the joined object reference digital interferometer (JORDI).
We propose a method to combine two phase-shifted holograms into a complex hologram. The reconstruction of the complex hologram will have no twin image noise but have a constant zeroth-order beam, which could be attenuated by subsequent optical filtering of the reconstructed image.
This paper describes experimental demonstration of holographic 3D reconstructions with a directly-viewing, transmissive, amplitude-modulating 5.5″ LCD SLM device in monochrome. A full-complex field modulation is achieved by the single amplitude-modulation SLM module using the Burckhardt-encoding scheme at the cost of the decrease in sampling. We define an effective holographic contrast ratio for the...
It is well known that the phase contains more important information about the field in comparison with the amplitude. Therefore the imaging of phase is encountered in many branches of modern science and engineering. Direct measurement of the phase is easy in the long wavelength regime of the electromagnetic spectrum, but is difficult in the short regime such as the visible light due to the limited...
Digital holographic microscopy which has established itself as one of the leading techniques for quantitative phase contrast imaging. It has many advantages over conventional microscopy such as, improvement in image contrast and providing thickness profile of the object along the propagation direction of the probe beam. Other advantages are that numerical focusing and lensless imaging are possible...
Holographic projection that utilizes holography to record and reconstruct images to be projected is an attractive technique because it inherently requires no lenses, which could lead to the development of an ultra-small projector. In addition, holographic projection has unique functions that are difficult to perform on other projections: multi-projection that projects a multi-image on plural screens...
Our recent progress in dynamic holographic 3D display is introduced, including compressive holographic 3D display, full-color holographic 3D display, medium for holographic 3D applications, occlusion culling algorithm and improved full analytical polygon-based method.
Holographic interferometry as a means for nondestructive testing of technical or biological components has got significant momentum by the introduction of digital holography. In this paper after an introduction to holography, holographic interferometry and digital holography practical examples from deformation analysis, form determination, refractive index measurement, and wave front reconstruction...
A new method for reconstructing whole optical wave fields with correct intensity and phase is presented which is based on the interference of two mutually coherent phase fields modulated by two spatial light modulators of the liquid crystal on silicon type. Contrary to classical holography this approach does not reconstruct twin images, thus it is a promising candidate for future holographic 3D-TV.
The authors present high-speed motion pictures of phase-image obtained by digital holography. To obtain only the complex amplitudes of dynamically moving objects free from unwanted images such as non-diffraction wave and the conjugate image in digital holography, parallel phase-shifting interferometry was applied. High-speed motion picture of phaseimage of the dynamic change of air induced by focused...
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