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Proceedings Paper

Digital polarization holography advancing 4G optics (Conference Presentation)
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Paper Abstract

The fourth generation optics (4G optics) enables the realization of novel optical components (lenses, gratings, vector vortices, etc.) by patterning the optical axis orientation in the plane of an anisotropic film. Such components exhibit near 100% diffraction efficiency for wavelengths meeting half-wave retardation condition. In this framework, we have advanced a step-forward by realizing different diffractive waveplates (DWs) with arbitrary spatial patterns of the optical axis orientation by exploiting the capability of a Digital Spatial Light Polarization Converter (DSLPC). The DSLPC is based on a reflective, high resolution Spatial Light Modulator (SLM) combined with an “ad hoc” optical setup. The most attractive feature of the use of a DSLPC for photoalignment is that the orientation of the alignment layer, and therefore of the fabricated liquid crystal (LC) or liquid crystal polymer (LCP) DWs, can be specified on a pixel-by-pixel basis. By varying the optical magnification or de-magnification between the SLM and the alignment layer, the spatial resolution of the photoaligned layer can be adjusted to be optimal for each application. We show that with a simple “click” it is possible to record different high resolution optical components as well as arbitrary patterns ranging from lenses to invisible and even dual labels.

Paper Details

Date Published: 3 November 2016
PDF: 1 pages
Proc. SPIE 9940, Liquid Crystals XX, 994007 (3 November 2016); doi: 10.1117/12.2235859
Show Author Affiliations
Luciano De Sio, BEAM Engineering For Advanced Measurements Co. (United States)
David E. Roberts, BEAM Engineering For Advanced Measurements Co. (United States)
Nelson V. Tabiryan, BEAM Engineering For Advanced Measurements Co. (United States)
Diane M. Steeves, U.S. Army Natick Soldier Research, Development and Engineering Ctr. (United States)
Brian R. Kimball, U.S. Army Natick Soldier Research, Development and Engineering Ctr. (United States)


Published in SPIE Proceedings Vol. 9940:
Liquid Crystals XX
Iam Choon Khoo, Editor(s)

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