Tech-Talks BREGENZ - Dr. Wilfried Pohl, Research Director, Bartenbach GmbH
Bartenbach is one of the pioneers in light planning and lighting research. Since Christian Bartenbach
Senior founded the engineering office in 1976, the company has been dedicated to light and visual
perception. Several lighting inventions made over the years, can be attributed to Bartenbach.
Dr. Wilfried Pohl, as a member of the Managing Board and Director of Research at Bartenbach GmbH,
has played a substantial role in many developments. LED professional talked with him about
Bartenbach’s history, education in the lighting business, the lighting parameters he deems very
important, the quality of light, "Human Centric Lighting" and "Biodynamic Lighting“, and how LEDs
have changed the light planning and lighting research company, in general.
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CIE Calls for Focused Research Efforts to Support Healthful Lighting Recommendations
Not so long ago, vision scientists thought that light detection - photoreception - was exclusively
performed by rod and cone cells in the retina. Photobiologists, however, conclusively demonstrated
otherwise with the identification of the intrinsically photoreceptive retinal ganglion cells (ipRGCs) [1].
Whereas rods and cones detect pattern and color, and send this information to the visual cortex,
ipRGCs (of which we are learning there are several subtypes) detect irradiance, and route their
information to many brain structures. The most thoroughly studied of these is the suprachiasmatic
nucleus of the hypothalamus, location of the central circadian clock, where the light and dark signals
trigger the offset and onset of production of the hormone melatonin. As shown in figure 1, however,
ipRGCs also project to other structures, about which, as yet, we have little information.
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First LightingEurope Summit – An Outstanding Figure in the Lighting Branch, Hands Over His Responsibilities
Diederik de Stoppelaar, one of the most influential and esteemed personalities in the lighting branch, has retired and passed over his responsibilities to Ourania Georgoutsakou. One of his last activities was initiating the first LightingEurope Summit, a one-day program, where a number of respected and eloquent lecturers were invited to speak. The venue, The Steigenberg Wiltcher's, in Brussels, was a good choice for this first of its kind event. About 150 lighting specialists, friends, and colleagues of Diederik de Stoppelaar attended the conference and farewell event.
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Swiss Photonics Workshop on Intelligent Efficient Solid State Lighting
Swiss Photonics held their Swiss Solid State Lighting Workshop in the Pantheon at Muttenz near Basel
on December 12th of last year. The ambience of the automobile museum was perfect! The program
covered a broad range of topics including Human Centric Lighting, Internet of Things and the results of
the LASSIE project (Large Area Solid State Lighting Intelligent Efficient: A 7th Framework Program for
Research and Technological Development). In the following article, Arno Grabher-Meyer, Editor-in-Chief
at LED professional, summarizes the highlights.
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Latest Research Publications in the Journal of Solid State Lighting
On December 24th and 29th, 2015, three new articles have been published in the SpringerOpen Journal of Solid State Lighting. The three articles are titled "Optical Role of Die Attach Adhesive for White LED Emitters: Light Output Enhancement without Chip-Level Reflectors", "The Importance of Intrinsically Photosensitive Retinal Ganglion Cells and Implications for Lighting Design", and "Towards Perceptual Accuracy in 3D Visualizations of Illuminated Indoor Environments".
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