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Голографический Принтер

ИЗБРАННЫЕ СТАТЬИ


Holographic stereogram printing based on digitally computed contentHolographic stereogram printing based on digitally computed contentgeneration platform (2019)

Erkhembaatar Dashdavaaa, Anar Khuderchuluuna, Young-Tae Lima, Seok-Hee Jeonb andErkhembaatar Dashdavaaa, Anar Khuderchuluuna, Young-Tae Lima, Seok-Hee Jeonb andNam Kima*

School of Information and Communication Engineering, Chungbuk Nat’l Univ., 1 Chungdae-ro,School of Information and Communication Engineering, Chungbuk Nat’l Univ., 1 Chungdae-ro,Seowon-gu, Cheongju, 28644, South Korea; bDept. of Electronics Engineering, Incheon Nat’l.Univ., 12-1 Songdo-dong, Yeonsu-gu, Incheon, South Korea

ABSTRACT

In this paper, we have implemented a 3D content generation simulator based on integration of phase-only spatial lightIn this paper, we have implemented a 3D content generation simulator based on integration of phase-only spatial lightmodulator (SLM) and LabVIEW software to develop a holographic stereogram printer that consists of a coherent laser, aspatial light modulator and X-Y translation stage with stepper motors. This content generation platform provides encodingof directional information extracted from rendered perspective images of real or virtual 3D object. There are mainly threeparts related to the implementation for holographic stereogram printer. In the first part, “Digital content generation” phaseonlySLM will be applied to the holographic printer system by loading series of perspective 2D images for eachholographic elements (hogel). Regarding this part, phase-only SLM can be converted into an amplitude modulator byadjusting the angles of the polarizer. The second part is “Control system” made in LabVIEW based platform for automaticrecording of the holographic stereograms which is synthesized from previous part. The third implementation part is“Optical system” for printing of parallax-related hogels on the holographic plate. To check the performance of thedeveloped approach, numerical simulations and optical experiments are implemented. The hogel images are sequentiallyexposed using the perspective images to form the whole holographic stereogram on the holographic light sensitive material.

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 Digital holographic printing using pulsed RGB lasers (2011)

David Brotherton-RatcliffeDavid Brotherton-RatcliffeGeola Technologies Ltd.Sussex Innovation CentreScience Park SquareFalmer, East Sussex BN1 9SB United KingdomE-mail: dbr@geola.co.ukStanislovas J. ZacharovasRamunas J. BakanasJulius PileckasAndrej NikolskijJevgenij KuchinGeola Digital UAB41 Naugarduko gtvVilnius LTU-03227, Lithuania

ABSTRACT

A one-step digital holographic printing system based on RGBAbstract. A one-step digital holographic printing system based on RGBpulsed-laser technology is described. The system is capable of writing fullcolorcomposite digital reflection holograms and composite digital holographicoptical elements up to a size of 1.0m×1.5mat hogel sizes rangingfrom 0.4 to 2 mm. We also show how the same pulsed-laser technologymay be used to generate fast high-quality copies of such holograms. Bothsilver halide and photopolymer materials are used. C  2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3596182]Subject terms: holography; digital holographic printing; pulsed lasers; threedimensionalprinting; digital holograms; hogels; holopixels; computer generatedholograms.Paper 110093SSR received Jan. 29, 2011; revised manuscript received Apr. 19,2011; accepted for publication Apr. 22, 2011; published online Aug. 3, 2011.

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 Holographic Printing of White-Light ViewableHolographic Printing of White-Light ViewableHolograms and Stereograms (2013)

Hoonjong Kang, Elena Stoykova, Jiyung Park,Hoonjong Kang, Elena Stoykova, Jiyung Park,Sunghee Hong and Youngmin Kim

Introduction

Denis Gabor [1] invented the holographic method to improve the resolution of an electron microscope in 1948. Following the invention of the coherent light sources a decade later, the holographic techniques proved their unique potential in many fields as three-dimensional (3D) display technology [2], optical metrology [3], medicine [4], commerce etc. Among them, fullcolor and full parallax high resolution holographic printing as a technique for recording of 3D objects and scenes which are reconstructed under white light illumination is experiencing extensive development. The holographic printing, being a part of the research on 3D imaging of 3D objects from sampled data sets by holographic means, also followed the two main approaches in this area: i) computation of the holographic fringes by numerical simulation of  the interference and encoding the resulting pattern onto a suitable medium for further optical display; ii) digital acquisition or computation of a set of discrete perspectives of a scene and their optical multiplexing in a holographic medium for building a stereoscopic pseudo 3D image.

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Full-Color Holographic 3D Printer (2003)

Masami Takano, Hiroaki Shigeta*, Takashi Nishihara, Masahiro Yamaguchi*, Susumu Takahashi,Masami Takano, Hiroaki Shigeta*, Takashi Nishihara, Masahiro Yamaguchi*, Susumu Takahashi,Nagaaki Ohyama*, Akihiko Kobayashi, Fujio IwataOptical Technology Research Laboratory, Technical Research Institute, Toppan Printing Co. Ltd.,4-2-3Takanodai-Minami,Sugito-machi, Kitakatsushika-gun, Saitama 345-8508, JAPAN*Imaging Science and Engineering Lab., Tokyo Institute of Technology4259 Nagatsuta, Midori-ku, Yokohama 226-8503, JAPAN

ABSTRACT

A Holographic 3D printer is a system that produces a direct hologram with full-parallax information using the 3-A Holographic 3D printer is a system that produces a direct hologram with full-parallax information using the 3-dimensional data of a subject from a computer. In this paper, we present a proposal for the reproduction of full-colorimages with the Holographic 3D printer.In order to realize the 3-dimensional color image, we selected the 3 laser wavelength colors of red (λ=633nm), green(λ=533nm), and blue (λ=442nm), and we built a one-step optical system using a projection system and a liquid crystaldisplay. The 3-dimensional color image is obtained by synthesizing in a 2D array the multiple exposure with these 3wavelengths made on each 250μm elementary hologram, and moving recording medium on a x-y stage.For the natural color reproduction in the holographic 3D printer, we take the approach of the digital processingtechnique based on the color management technology. The matching between the input and output colors is performedby investigating first, the relation between the gray level transmittance of the LCD and the diffraction efficiency of thehologram and second, by measuring the color displayed by the hologram to establish a correlation. In our firstexperimental results a non-linear functional relation for single and multiple exposure of the three components werefound. These results are the first step in the realization of a natural color 3D image produced by the holographic color3D printer.Keyword: Holographic 3D printer, holographic stereogram, full-parallax, 3-dimensional image, and color reproduction

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Holoprinter: study and development of a direct writeHoloprinter: study and development of a direct writesynthetic full parallax holographic system (2018)

Alejandro Madrid-Sánchez1,*, Daniel Velásquez-Prieto1Alejandro Madrid-Sánchez1,*, Daniel Velásquez-Prieto11. Departamento de Ciencias Física, Universidad EAFIT. Medellín, Colombia

ABSTRACT

Holoprinters based on holographic stereograms (HS) have been developed to synthesize hologramsby using 2D images with perspective information of 3D objects. The objects can be real or computergenerated. HS has been applied to different fields such as engineering, medicine and military becausethe high visual impact of the tridimensional and multi-view images it presents. To implement aHoloprinter requires development of three components: i) 2D images generation, ii) optical systemdesign for HS recording and iii) mechanical and control implementation. Therefore, we design anddevelop each of the components, which integrated compose a holoprinter to synthesize full parallaxHS. This paper studies basis for production of this kind of holograms and describes the computationaland opto-mechanical design and implementation that we have made. Experimental HS were obtainedto validate the system.Key words: Holoprinter, 3D images, holograms, Holography, Holographic display, autostereoscopic,holographic stereogram, synthetic hologram

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 Three-dimensional reflection screens fabricated byThree-dimensional reflection screens fabricated byholographic wavefront printer (2018)

Ryutaro Oi,a,* Ping-Yen Chou,b Boaz Jessie Jackin,a Koki Wakunami,a Yasuyuki Ichihashi,a Makoto Okui,aRyutaro Oi,a,* Ping-Yen Chou,b Boaz Jessie Jackin,a Koki Wakunami,a Yasuyuki Ichihashi,a Makoto Okui,aYi-Pai Huang,b and Kenji YamamotoaaNational Institute of Information and Communications Technology, Electromagnetic Research Institute,Electromagnetic Applications Laboratory, Koganei, Tokyo, JapanbNational Chiao Tung University, Department of Photonics and Institute of Electro-Optical Engineering, Hsinchu, Taiwan

Abstract

Several wavefront printers have been recently proposed. Since the printers can record an arbitraryAbstract. Several wavefront printers have been recently proposed. Since the printers can record an arbitrarycomputer-generated wavefront, they are expected to be useful for fabricating complex mirror arrays used in frontprojection 3-D screens without using real existing optics. We prototyped two transparent reflective screens usingour hologram printer in experiments. These screens could compensate for a spherically distorted reference wavecaused by a short projection distance to obtain an ideal reference wave. Owing to the use of the wavefrontprintedscreen, the 3-D display was simply composed of a normal 2-D projector and a screen without usingextra optics. In our binocular system, reflected light rays converged to the left and right eyes of the observerand the crosstalk was less than 8%. In the light field system, the reflected light rays formed a spatially sampledlight field and focused a virtual object in a depth range of 30 mm with a 13.5- deg viewing angle. By developingwavefront printing technology, a complex optics array may easily be printed by nonprofessionals for opticsmanufacturing. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of thiswork in whole or in part requires full attribution of the original publication, including its DOI. [DOI: 10.1117/1.OE.57.6.061605]Keywords: wavefront printer; hologram printer; holographic optical element; binocular display; light field display; holography.Paper 171740SSP received Oct. 31, 2017; accepted for publication Dec. 29, 2017; published online Jan. 27, 2018; corrected Apr. 18,2018.

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