Journal ArticleDOI
Band-limited zone plates for single-sideband holography
Yasuhiro Takaki,Yumi Tanemoto +1 more
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TLDR
A band-limited cosine zone plate appropriate for use with the single-sideband technique is derived and reduces calculation time for a hologram to approximately 75%.Abstract:
The single-sideband technique eliminates a conjugate image and zeroth order diffraction light, producing only a reconstructed image of a hologram. A band-limited cosine zone plate appropriate for use with the single-sideband technique is derived. The width of the zone plate is half that of a conventional zone plate in one direction. The proper selection of a transmitted spatial frequency band leads to an interlaced band-limited zone plate that has complex amplitudes in odd or even rows. The use of such a zone plate reduces calculation time for a hologram to approximately 75%. Experimental verification of this is presented.read more
Citations
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Speckle-free and grayscale hologram reconstruction using time-multiplexing technique
TL;DR: A speckle-reduction technique employing a time-multiplexing method is proposed, which decomposed into multiple bit planes to represent the grayscale of object points, and binary holograms are generated from the bit plane patterns by using a half-zone plate technique.
Journal ArticleDOI
Complex Fresnel hologram display using a single SLM
TL;DR: A novel optical method to display a complex Fresnel hologram using a single spatial light modulator (SLM) and the degree of freedom of the synthesized complex hologram display can be extended by involving more than three amplitude holograms.
Journal ArticleDOI
Table screen 360-degree holographic display using circular viewing-zone scanning
Tatsuaki Inoue,Yasuhiro Takaki +1 more
TL;DR: A table screen 360-degree holographic display is proposed, with an increased screen size, having an expanded viewing zone over all horizontal directions around the table screen, and the viewing zones are localized to practically realize wavefront reconstruction.
Journal ArticleDOI
Flexible retinal image formation by holographic Maxwellian-view display.
Yasuhiro Takaki,Naohiro Fujimoto +1 more
TL;DR: This study presents the holographic Maxwellian-view display, which generates a wavefront converging on the pupil and forming images on the retina, and allows the phase modulation in the pupil, eye aberrations can be corrected; thus, retinal images can be formed for eyes with astigmatism.
Journal ArticleDOI
Viewing-zone scanning holographic display using a MEMS spatial light modulator.
Yasuhiro Takaki,Keisuke Fujii +1 more
TL;DR: To enlarge the screen size and the viewing zone, this study proposes a viewing-zone scanning system with enlarged hologram screen and horizontally scanned reduced viewing zone that is localized using converging light emitted from the screen and the entire screen can be viewed from the localized viewing zone.
References
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Journal ArticleDOI
Reconstructed Wavefronts and Communication Theory
Emmett N. Leith,Juris Upatnieks +1 more
TL;DR: In this paper, a two-step imaging process is described from a communication-theory viewpoint, which consists of three well-known operations: a modulation, a frequency dispersion, and a square-law detection.
Journal ArticleDOI
Interactive computation of holograms using a look-up table
TL;DR: Several methods of increasing the speed and simplicity of the computation of off-axis transmission holograms are presented, with applications to the real-time display ofholographic images.
Journal ArticleDOI
Single-Sideband Holography*
Olof Bryngdahl,Adolf W. Lohmann +1 more
TL;DR: In this paper, a single-sideband technique was used to improve the quality of the reconstruction of the twin image in line holograms of amplitude objects and objects with a weak background.
Journal ArticleDOI
Viewing-zone enlargement method for sampled hologram that uses high-order diffraction
TL;DR: A method of enlarging the viewing zone for holography that has holograms with a pixel structure by combining high-order reconstructed beams from the hologram with aliasing.
Journal ArticleDOI
Time-alternating method based on single-sideband holography with half-zone-plate processing for the enlargement of viewing zones.
TL;DR: This work proposes a method to improve the viewing zone restriction by time-alternating switching of hologram patterns and a spatial filter set on the focal plane of a reconstruction lens.