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Light Profile Uniformity in Linear Lighting Applications

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LED lighting in a linear form factor can provide valuable accent lighting and vertical illumination in architectural cove and graze applications. Ideally, linear lights provide a smooth gradient of light onto a surface without disturbances along their length. However, socket shadows between discrete fixtures and multiple LEDs per fixture can lead to visible nonuniformities, often worse near the light source but mixed to uniformity further away. Perceived mixing distances in the illumination patterns of a variety of linear light sources were assessed visually, and objective metrics based on illumination measurements were developed. Accurate predictions of mixing distances are shown based on trends in CIE DE2000 color errors computed between the measured light pattern and analogous Gaussian-weighted local neighborhood regions. Effects of variations in parameters of DE threshold and neighborhood size and shape are discussed.
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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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