Opt. Express Article

01/11/2022: C. Draper and P.-A. Blanche, “Holographic curved waveguide combiner for HUD/AR with 1-D pupil expansion“, Opt. Express 30, 2503-2516 (2022). Link

In this publication, we are demonstrating for the first time ever how a curved waveguide can be used as a combiner for head up display or augmented reality applications. We used holographic optical elements to correct for the distortion of the image during its propagation inside the curved waveguide. The image is extracted from the waveguide multiple times to expand the system pupil and offer a large eye box. The image that is perceived by the viewer does not show any aberration, and is projected at infinity so it does not require any accommodation. In addition, we are using a polymer waveguide, instead of glass, which reduces dramatically the cost of the system.

This publication has been the 7th top downloaded article from Optics Express during the month of January.

Opt. Express Article

12/23/2021: P. E. Alcaraz, G. Nero, and P.-A. Blanche, “Bandwidth optimization for the Advanced Volume Holographic Filter,” Opt. Express 30, 576-587 (2022). Link

We previously explained that two diffraction gratings working together can extend the spectral bandwidth of the system (link). In this new paper, we optimized the configuration to obtain the maximum bandwidth. This technique can find applications in astronomy and free space communication.

Review Article

10/04/2021: P.-A. Blanche, J.-W. Ka, N. Peyghambarian, “Review of Organic Photorefractive Materials and Their Use for Updateable 3D Display“, materials (MDPI), Materials 2021, 14, 5799. Link

In this article we are reviewing:

  • The photorefractive effect.
  • The specific characteristics for a material to be used in 3D display.
  • The different molecules found in photorefractive polymers.
  • How to make samples for holographic display.
  • The setup to record and display 3 color holographic 3D stereograms.


05/26/2021: Erol Ozgur et al., “Parametric dog-bone-shaped tunable cylindrical fluidic lens“, Optics Vol. 60, Issue 16, pp. 4755-4761 (2021). Link

In this article we are demonstrating the best shape to obtain a fluid cylindrical lens, which focal distance can be adjusted without introducing aberration.

This article was selected by OSA to appear in the “Spotlight on Optics“. Link


02/24/2021: R.S. Ketchum; P.-A. Blanche, “Diffraction Efficiency Characteristics for MEMS-Based Phase-Only Spatial Light Modulator with Nonlinear Phase Distribution“, Photonics 2021, 8, 62. Link

In this new article, we explain how to optimize the diffraction efficiency of a new type of MEMS phase modulator manufactured by Texas Instruments. This can find application in 3D display, HUD, LIDAR.

Feature issue

02/01/2021: Juan Liu et al., “Digital Holography and 3D Imaging 2020: introduction to the feature issue“, Appl. Opt. 60, DH1-DH2 (2021). Link

The Journal of the Optical Society of America A (JOSA A) and Applied Optics (AO) have just published a Joint Feature Issue expanding on material presented at OSA’s 2020 Digital Holography and 3D Imaging Conference (DH), which was held virtually 22-26 June 2020. The articles included cover major research topics in holography, including digital holography, holographic imaging, holographic measurement, holographic display, holographic deep learning, and other novel techniques. Link


02/01/2021: P. E. Alcaraz, R. S. Ketchum, and P.-A. Blanche, “Robust phase unwrapping algorithm based on enhanced denoising and fringe quality improvement routines,” OSA Continuum 4, 633-649 (2021). Link

Born out of necessity because we were not finding any algorithm robust enough for unwrapping our experimental data, we created our own and verified its performance.


01/27/2021: My editorial for the Special Issue: Photoactive Materials: Synthesis, Applications and Technology of MDPI Materials has been published. Link

I would like to thank all the authors that participated in this Special Issue, as well as the people I interacted with at MDPI for their help with the editorial process.

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