Color translucent head-up display based on a segmented Fourier hologram

Author(s):

Jaroslaw Suszek, Maciej Sypek, Andrzej Siemion, Agnieszka Fajst, Michal Makowski and Andrzej Kolodziejczyk

Abstract:

“The paper presents the numerical and experimental results of reconstructing images from a spatially segmented Fourier hologram with additional carrier frequencies, acting as a translucent head-up display (HUD). Successful reconstructions of colorful images visible at the infinity were achieved. The design procedure is described and some limitations of the method are discussed, like the appearance of ghost images. Exemplary results from numerical and real experiments are given. In order to obtain color images three beams of primary colors were successfully utilized to create a color mixture.”

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Publication: Photonics Letters of Poland

Issue/Year/DOI: Vol 1, No 3 (2009)
DOI: 10.4302/plp.2009.3.02

A novel three-dimensional holographic display system based on LC-R2500 spatial light modulatora

Author(s): Huadong Zheng, Yingjie Yu, Cuixia Dai

Abstract:

“A novel holographic display system is proposed in this paper. The system takes LC-R2500, a kind of reflective liquid crystal spatial light modulator, (LC-SLM) as the core display unit, which can meet the requirement of real-time reconstruction of three-dimensional (3D) objects from holograms in free space. The relationship between hologram recording and image reconstruction is discussed, and the parameters associated with the magnification of reconstructed image over original object are determined. Experimental results of holographic display using the system are also given in the end.”

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Publication: Optik – International Journal for Light and Electron Optics – via ScienceDirect.com, (subscription required)

Issue/Year/DOI: Optik – International Journal for Light and Electron Optics, Volume 120, Issue 9, May 2009, Pages 431-436
doi:10.1016/j.ijleo.2007.11.002

Phase Contrast Projection Display Using Photopolymer

Author(s): Piao, Mei-Lan; Kim, Nam; Park, Jae-Hyeung

Abstract:

“We propose a phase contrast filter using photopolymer, for the phase contrast projection display. The photopolymer has high photosensitivity such that its optically induced refractive index change has a linear dependency on the illuminating light intensity. We implemented a phase contrast projection display using photopolymer as a phase contrast filter. By controlling the refractive index change of the photopolymer, we successfully convert an input phase image into a high contrast intensity image. We also investigated the effect of the photopolymer illumination condition on the quality of the displayed intensity image. As a projector, we achieved 82% phase to intensity conversion efficiency, which implies that the proposed method can potentially have much higher light efficiency than conventional projection display.”

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Publication: Journal of the Optical Society of Korea, (free download)

Issue/Year/DOI: Journal of the Optical Society of Korea, Volume 12, Issue 4, December 2008, pp.319-325
DOI : 10.3807/JOSK.2008.12.4.319

Structured illumination in total internal reflection fluorescence microscopy using a spatial light modulator

Author(s): Reto Fiolka, Markus Beck, and Andreas Stemmer

Abstract:

“In wide-field fluorescence microscopy, illuminating the specimen with evanescent standing waves increases lateral resolution more than twofold. We report a versatile setup for standing-wave illumination in total internal reflection fluorescence microscopy. An adjustable diffraction grating written on a phase-only spatial light modulator controls the illumination field. Selecting appropriate diffraction orders and displaying a sheared (tilted) diffraction grating allows one to tune the penetration depth in very fine steps. The setup achieves 91 nm lateral resolution for green emission.”

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Publication: Optics Letters (subscription required)

Issue/Year/DOI: Optics Letters, Vol. 33, Issue 14, pp. 1629-1631
doi:10.1364/OL.33.001629

A Projection System for Real World Three-Dimensional Objects Using Spatial Light Modulators

Author(s): Gopinathan, U. Monaghan, D.S. Hennelly, B.M. McElhinney, C.P. Kelly, D.P. McDonald, J.B. Naughton, T.J. Sheridan, J.T.

Abstract:

“We discuss a projection system for real world three-dimensional objects using spatial light modulators (SLM). An algorithm to encode the digital holograms of real world objects on to an SLM is presented. We present results from experiments to project holograms of real world holograms using a nematic liquid crystal SLM. We discuss the case when the pixel sizes of the charge-coupled device (CCD) and SLM used for recording the hologram and projection are different.”

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Publication: Journal of Display Technology – via IEEE Xplore Digital Library (subscription required)

Issue/Year/DOI: Journal of Display Technology, Volume 4, Issue 2, June 2008, Pages 254-261
doi:10.1109/JDT.2007.913943

An adaptive optics imaging system based on a high-resolution liquid crystal on silicon device

Author(s): Quanquan Mu, Zhaoliang Cao, Lifa Hu, Dayu Li, and Li Xuan

Abstract:

“An adaptive optics imaging system is introduced in this paper. A high resolution liquid crystal on silicon (LCOS) device was used as a phase only wave front corrector instead of a conversional deformable mirror. The wave front aberration was detected by a Shack-Hartmann (SH) wave front sensor, which has λ/100 rms wave front measurement accuracy. Under this construction 0.09λ (λ=0.6328µm) Peak to Valley correction precision was reached. Further more, some low frequency hot convection turbulence induced by an electric iron was compensated in real time at the same precision. The Modulation Transfer Function (MTF) of this system was also measured before and after wave front correction. Under the active correction of LCOS, the system reached the diffraction limited resolution approximately 65l p/mm on the horizontal direction. All of this showed the ability of using this device in high resolution, low temporal turbulence imaging system, such as retinal imaging, to improve the resolution performance.”

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Publication: Optics Express (free download)

Issue/Year/DOI: Optics Express, Vol. 14, Issue 18, pp. 8013-8018
doi:10.1364/OE.14.008013

Measurement technique for elastic and mechanical properties of polycrystalline silicon-germanium films using surface acoustic waves and projection masks

Author(s): Bennis, A.; Leinenbach, C.; Raudzis, C.; Müller-Fiedler, R.; Kronmüller, S.

Abstract:

“Using Rayleigh surface acoustic waves (SAW), the Young’s modulus, the density and the thickness of polycrystalline Silicon-Germanium (SiGe) films deposited on silicon and SiO2 were measured, in excellent agreement with theory. The dispersion curve of the propagating SAW is calculated with a Boundary Element Method (BEM)-Model based on Green’s functions. The propagating SAW is generated with a nanosecond laser in a narrowband scheme projecting stripes from a mask on the surface of the sample. For this purpose a glass mask and a liquid crystal display (LCD) mask are used. The slope of the SAW is then measured using a probe beam setup. From the wavelength of the mask and the frequency of the measured SAW, the dispersion curve is determined point by point. Fitting the BEM-Model to the measured nonlinear dispersion curve provides several physical parameters simultaneously. In the present work this is demonstrated for the Young’s modulus, the density and the thickness of SiGe films. The results from the narrowband scheme measurement are in excellent agreement with separated measurements of the thickness (profilometer), the density (balance) and the Young’s modulus (nanoindenter).”

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Publication: 2006 – Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS – Proceedings (free download)

Issue/Year/DOI: Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS, 2006
DOI : 10.4267/2042/6508

Full-color autostereoscopic 3D display system using color-dispersion-compensated synthetic phase holograms

Author(s): Kyongsik Choi, Hwi Kim, and Byoungho Lee

Abstract:

“A novel full-color autostereoscopic three-dimensional (3D) display system has been developed using color-dispersion-compensated (CDC) synthetic phase holograms (SPHs) on a phase-type spatial light modulator. To design the CDC phase holograms, we used a modified iterative Fourier transform algorithm with scaling constants and phase quantization level constraints. We obtained a high diffraction efficiency (~90.04%), a large signal-to-noise ratio (~9.57dB), and a low reconstruction error (~0.0011) from our simulation results. Each optimized phase hologram was synthesized with each CDC directional hologram for red, green, and blue wavelengths for full-color autostereoscopic 3D display. The CDC SPHs were composed and modulated by only one phase-type spatial light modulator. We have demonstrated experimentally that the designed CDC SPHs are able to generate full-color autostereoscopic 3D images and video frames very well, without any use of glasses.”

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Publication: Optics Express (free download)

Issue/Year/DOI: Optics Express, Vol. 12, Issue 21, pp. 5229-5236
doi:10.1364/OPEX.12.005229