Paul Myland

• Master of Science
• Research Assistant at Technical University of Darmstadt

This study explores a novel approach to monitor the spectral emission of LEDs by estimating the spectral power distribution from the spectral sensor responses during an accelerated ageing experiment. Two methods for reconstructing the actual LED spectra from sensor responses are presented and tested, one solely requires sensor datasheet information...

Lighting is not only a key mediator for the perception of the architectural space but also plays a crucial role regarding the long-term well-being of its human occupants. Future lighting solutions must therefore be capable of monitoring lighting parameters to allow for a dynamic compensation of temporal changes from the optimal or intended conditio...

This paper explores human observer preferences for various sky-like interior lighting scenarios realized by a combination of a blue-enriched indirect uplight component with a correlated color temperature (CCT) of 6,500 K up to 30,000 K and a 4,000 K or 5,500 K direct downlight component. Variations in the natural sky were mimicked by the indirect u...

Cortisol secretion has a fundamental role in human circadian regulation. The cortisol awakening response (CAR) can be observed as a daily recurring sharp increase in cortisol concentration within the first hour after awakening and is influenced by environmental light conditions. The current work provides the study protocol for an ongoing research p...

Featured Application Accurate practical measurements of the circadian effectiveness of daylight and artificial light sources using RGB color sensors for future human-centered lighting control. Abstract The three main tasks of modern lighting design are to support the visual performance, satisfy color emotion (color quality), and promote positive n...

LICHT - Fachzeitschrift für Lichttechnik und Lichtplanung, Ausgabe 8/2021, pp. 62–70: Die richtige Beleuchtung spielt in Büroumgebungen eine immer größere Rolle. Welche Auswirkungen räumlich variable, ungleichmäßige Lichtverteilungen auf die Beleuchtungspräferenzen des Menschen bei der Erfüllung bestimmter Aufgaben haben, während die übrige Raumlic...

Die Optimierung human-zentrierter Beleuchtungssysteme darf nicht ausschließlich unter biodynamischen Aspekten stattfinden, sondern es müssen dabei auch emotionale und visuelle Gesichtspunkte berücksichtigt werden, um, insbesondere im Kontext der Büroinnenraumbeleuchtung, ein zu jederzeit konzentriertes und effizientes Arbeiten zu ermöglichen. Um de...

Featured Application In-field spatially resolved light measurements for the characterization of non-visual effects and proper prediction of the circadian effectiveness for human-centric lighting design. Abstract As one factor among others, circadian effectiveness depends on the spatial light distribution of the prevalent lighting conditions. In a...

Due to their potential use as an internal reference, memory colors may provide an excellent approach for the color rendition evaluation of white light sources in terms of predicting visual appreciation. Because of certain limitations in the design of existing memory-related color quality measures, a new metric based on the outcome of a series of re...

Intelligent systems for interior lighting strive to balance economical, ecological, and health-related needs. For this purpose, they rely on sensors to assess and respond to the current room conditions. With an augmented demand for more dedicated control, the number of sensors used in parallel increases considerably. In this context, the present wo...

For the design of modern office environments, lighting is a central aspect. With regard to current practice, uniform illumination is most often applied in interiors. In this paper, however, further aspects of a more individual approach are investigated, that deliberately violate the usual demands for uniformity by explicitly considering task-relate...

Fully digital microscopes are becoming more and more common in surgical applications. In addition to high-resolution stereoscopic images of the operating field, which can be transmitted over long distances or stored directly, these systems offer further potentials by supporting the surgical workflow based on their fully digital image processing cha...

With video-assisted surgery devices becoming more common in all fields of diagnostics and therapy, the question of how well such systems are able to reproduce surface colors of organic tissue arises, especially in cases where a proper distinction of different kinds of tissue-not only through their texture but also through their color-might be cruci...

Digital color imaging technology has become omnipresent in today's modern life. Digital image capturing and reproduction devices such as smartphones, digital still and video cameras, displays , printers, and color scanners can be found in every home, offering extremely high functionality and flexibility. In order to guarantee qualitatively good res...

Digital color imaging technology has become omnipresent in today's modern life. Digital image capturing and reproduction devices such as smartphones, digital still and video cameras, displays, printers, and color scanners can be found in every home, offering extremely high functionality and flexibility. In order to guarantee qualitatively good resu...