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Ultr a thin Color Filter for Wearable Displays and Multispectral Imaging

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We present a new approach to making in-pixel color filters for a wearable display such as LCOS (liquid crystal on silicon) or a DLP (digital light processing) system. Unlike current color filters or methods used in these devices, our approach enables Red-Green-Blue (RGB) color images using color filters fabricated using semiconductor ultra-thin film. These filters are less than 100 nm thick, making them better suited to integration with light modulators than traditional pigment-based filters. Additionally, these films are fabricated via e-beam evaporation or RF sputtering, which is compatible with most modern chip manufacturing. In this paper, we present the design concept for these filters, including simulation results that demonstrate improved liquid crystal control when using these filters, demonstrate an example RGB filter array and also present an enhanced structure which could meet requirements of DLP based multispectral imaging. This is the first time the use of these filters is presented for use in liquid crystal based displays and DLP.
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Document Type: Research Article

Publication date: November 3, 2014

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  • CIC is the premier annual technical gathering for scientists, technologists, and engineers working in the areas of color science and systems, and their application to color imaging. Participants represent disciplines ranging from psychophysics, optical physics, image processing, color science to graphic arts, systems engineering, and hardware and software development. While a broad mix of professional interests is the hallmark of these conferences, the focus is color. CICs traditionally offer two days of short courses followed by three days of technical sessions that include three keynotes, an evening lecture, a vibrant interactive (poster) papers session, and workshops. An endearing symbol of the meeting is the Cactus Award, given each year to the author(s) of the best interactive paper; there are also Best Paper and Best Student Paper awards.

    Please note: for Purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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