scholarly journals Holographic Three-Dimensional Imaging of Terra-Cotta Warrior Model Using Fractional Fourier Transform

2019 ◽  
Vol 5 (8) ◽  
pp. 67
Author(s):  
Zhi-Fang Gao ◽  
Hua-Dong Zheng ◽  
Ying-Jie Yu
Keyword(s):  
Fourier Transform ◽  
Spatial Light Modulator ◽  
Fractional Fourier Transform ◽  
Three Dimensional ◽  
Experimental System ◽  
Speckle Noise ◽  
Light Modulator ◽  
Multiple Phase ◽  
3D Image Reconstruction ◽  
Phase Holograms

Holographic three-dimensional (3D) imaging of Terra-Cotta Warrior model using Fractional Fourier Transform is introduced in this paper. Phase holograms of Terra-Cotta Warrior model are calculated from 60 horizontal viewing-angles by the use of fractional Fourier transform (FRT). Multiple phase holograms are calculated for each angle by adding proper pseudorandom phase to reduce the speckle noise of a reconstructed image. Experimental system based on high-resolution phase-only spatial light modulator (SLM) is built for 3D image reconstruction from the calculated phase holograms. The texture of the Terra-Cotta Warrior model is rough. The calculation of rough texture is optimized in order to show better model details. The effects of computing distance and layer thickness on imaging quality are analyzed finally.

scholarly journals Experimental Study on Phase Conjecture Based on Two-dimensional Image and Carrying Three-dimensional Image With Mist in Electro-holographic Reconstruction *

2022 ◽  
Author(s):  
ZHAO Zhi-xiong ◽  
ZHANG Hua ◽  
Kuang Qing-yun ◽  
Li Bo ◽  
Hu Lin
Keyword(s):  
Three Dimensional ◽  
Experimental System ◽  
Polynomial Equation ◽  
Speckle Noise ◽  
Complex Object ◽  
Two Dimensional ◽  
Phase Information ◽  
Light Modulator ◽  
Dimensional Image ◽  
Holographic Reconstruction

Abstract A method is proposed for phase conjecture based on the intensity curve of a two-dimensional(2D) image by computing a polynomial equation. The intensity values of the 2D image, which represents the distance between the image detectors and the three-dimensional(3D) scene is converted to phase information by our method. The results of numerical calculation with phase conjecture are analyzed. And what’s more, the numerical reconstruction results with phase information obtained as initial phase factors of a complex object for Fresnel kinoform and dynamic pseudorandom-phase tomographic computer holography(DPP-TCH) are compared. The peak signal-to-noise ratio(PSNR) and correlation coefficient (CC) between the reconstructed images and original object are analyzed. An experimental system is designed for photoelectric holographic reconstruction based on phase-only liquid crystal spatial light modulator(LC-SLM) and mist screen. The electro-optical experimental results indicate that suppressed the speckle noise 3D images that can be observed with naked eye have been obtained.

Holographic three-dimensional displays with liquid crystal on silicon spatial light modulator

2004 ◽  
Author(s):  
Aneta Michalkiewicz ◽  
Malgorzata Kujawinska ◽  
Tomasz Kozacki ◽  
Xinghua Wang ◽  
Philip J. Bos
Keyword(s):  
Liquid Crystal ◽  
Spatial Light Modulator ◽  
Three Dimensional ◽  
Light Modulator ◽  
Liquid Crystal On Silicon

scholarly journals Three-dimensional adaptive optics ultrahigh-resolution optical coherence tomography using a liquid crystal spatial light modulator

2005 ◽  
Vol 45 (28) ◽  
pp. 3432-3444 ◽  
Author(s):  
Enrique J. Fernández ◽  
Boris Považay ◽  
Boris Hermann ◽  
Angelika Unterhuber ◽  
Harald Sattmann ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Liquid Crystal ◽  
Adaptive Optics ◽  
Spatial Light Modulator ◽  
Three Dimensional ◽  
Optical Coherence ◽  
Light Modulator ◽  
Ultrahigh Resolution

Optical 3D Manipulation and Observation in Real-Time

2006 ◽  
Vol 18 (6) ◽  
pp. 692-697 ◽  
Author(s):  
Jesper Glückstad ◽  
◽  
Peter John Rodrigo ◽  
Ivan Perch-Nielsen
Keyword(s):  
Real Time ◽  
Phase Contrast ◽  
Spatial Light Modulator ◽  
Laser Light ◽  
National Laboratory ◽  
Three Dimensional ◽  
Living Cells ◽  
Promising Technique ◽  
Light Modulator ◽  
3D Manipulation

Three-dimensional light structures can be created by modulating the spatial phase and polarization properties of the laser light. A particularly promising technique is the Generalized Phase Contrast (GPC) method invented and patented at Risø National Laboratory. Based on the combination of programmable spatial light modulator devices and an advanced graphical user-interface the GPC method enables real-time, interactive and arbitrary control over the dynamics and geometry of synthesized light patterns. Recent experiments have shown that GPC-driven micro-manipulation provides a unique technology platform for fully user-guided assembly of a plurality of particles in a plane, control of particle stacking along the beam axis, manipulation of multiple hollow beads, and the organization of living cells into three-dimensional colloidal structures. These demonstrations illustrate that GPC-driven micro-manipulation can be utilized not only for the improved synthesis of functional microstructures but also for non-contact and parallel actuation crucial for sophisticated opto- and micro-fluidic based lab-on-a-chip systems.

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