Journal ArticleDOI
Suppression of higher diffraction orders and intensity improvement of optically reconstructed holograms from a spatial light modulator
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TLDR
In this paper, a method to improve the quality of the reconstructed light field by eliminating the higher diffraction orders and by modifying hologram data based on the characteristic modulation properties of the SLM is presented.Abstract:
Spatial light modulators (SLMs) can be used to optically reconstruct the complex amplitude of a wavefield. The reconstructed wavefield in the far-field is corrupted by effects arising from the non-ideal modulation properties and the discrete nature of SLMs. These effects are regarded as drawbacks and particularly disturb the visual impression and reduce the light efficiency of the reconstruction in the region of interest. In this paper we present a novel method to improve the quality of the reconstructed light field by eliminating the higher diffraction orders and by modifying hologram data based on the characteristic modulation properties of the SLM. We achieve the elimination of the higher orders optically using only one lens in a 4f configuration with an appropriate amplitude mask inserted in the Fourier plane. For compensating the non-ideal modulation properties of the SLM we characterize the device to alter the digital hologram data in an appropriate way. The basic principle of this technique and its experimental verification are described.read more
Citations
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Journal ArticleDOI
A line scanned light-sheet microscope with phase shaped self-reconstructing beams
TL;DR: This work presents an add-on module to a standard inverted microscope using a scanned beam that is shaped in phase and amplitude by a spatial light modulator to increase both image quality and penetration depth of illumination beams in strongly scattering media.
Journal ArticleDOI
Review of computer-generated hologram algorithms for color dynamic holographic three-dimensional display
Dapu Pi,Jun Liu,Yongtian Wang +2 more
TL;DR: In this article , the essence of various computer-generated hologram algorithms and provide some insights for future research are discussed and a review of color dynamic holographic three-dimensional display algorithms are presented.
Journal ArticleDOI
Voxel resolution in the directed self-assembly of liquid crystal polymer networks and elastomers.
TL;DR: This work reports on a rapid and scalable photopatterning method to prepare alignment surfaces with a throughput of 10 mm2 s-1, using a commercial spatial light modulator and projection optics and details that the resolution limit of the inscribed director profile is determined by the elastic-mediated orientational relaxation of the liquid crystalline materials.
Journal ArticleDOI
Review of computer-generated hologram algorithms for color dynamic holographic three-dimensional display
Dapu Pi,Jun Liu,Yongtian Wang +2 more
TL;DR: In this paper , the essence of various computer-generated hologram algorithms and provide some insights for future research are discussed and a review of color dynamic holographic three-dimensional display algorithms are presented.
Journal ArticleDOI
Adjustable liquid aperture to eliminate undesirable light in holographic projection.
TL;DR: An adjustable liquid aperture to eliminate the undesirable light in a holographic projection is proposed using a chamber formed with a cylindrical tube based on hydrodynamic actuation and a divergent spherical wave and a solid lens are used.
References
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Journal ArticleDOI
Introduction to Fourier Optics
Joseph W. Goodman,Mary E. Cox +1 more
TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.
Book
Introduction to Fourier optics
TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.
Journal Article
A practical algorithm for the determination of phase from image and diffraction plane pictures
TL;DR: In this article, an algorithm is presented for the rapid solution of the phase of the complete wave function whose intensity in the diffraction and imaging planes of an imaging system are known.
Journal ArticleDOI
Phase-shifting digital holography
Ichirou Yamaguchi,Tong Zhang +1 more
TL;DR: A new method is proposed in which the distribution of complex amplitude at a plane is measured by phase-shifting interferometry and then Fresnel transformed by a digital computer, which can reconstruct an arbitrary cross section of a three-dimensional object with higher image quality and a wider viewing angle than from conventional digital holography using an off-axis configuration.
Journal ArticleDOI
Signal detection by complex spatial filtering
TL;DR: The experimental results obtained to date indicate that this technique provides an excellent two-dimensional filtering capability that will play a key role in such problems as shape recognition and signal detection.