Abstract
Different micro-optical structures have been developed for the application in transparent building elements like windows or glazed partitions. In cooperation with the Department of Microstructure Technology, TU Dortmund, as well as partners from research institutions and industry solutions for the following two tasks were elaborated: (1) two-sided structures on glass panes for redirection of direct sunlight into the depth of rooms improving daylighting; and (2) one-sided structures on clear panes, edge-lit by LED, for one-way and selective light emission. High demands were made on the small structures (50–200 μm) as to efficiency of light redirection respectively light emission, and quality of image. Technologies for large scale manufacturing are developed in cooperation with partners from industry. Having tested laboratory samples (100 mm × 100 mm) successfully, larger prototypes are produced in hot embossing and UV embossing technique. Optimization of structure geometry and manufacturing process is continuing while design solutions for component and luminaire integration are developed. Architectural applications in transparent building elements for combined natural and artificial lighting are demonstrated, achieving high quality and low energy room illumination.
Highlights
Different micro-optical structures have been developed for the application in transparent building elements like windows or glazed partitions
High demands were made on the small structures (50–200 mm) as to efficiency of light redirection respectively light emission, and quality of image
Technologies for large scale manufacturing are developed in cooperation with partners from industry
Summary
The main objectives and work packages of the project are defined as follows. The present state microstructures have to be optimized as to optical performance and largescale manufacturing. The technical integration of micro-structured daylighting and LED systems in windows is developed in a systematic approach of modular systems. Prototypes of lighting systems in realistic dimensions and constructions are manufactured and their performance is measured in laboratories and test rooms. The options of architectural integration are demonstrated in exemplary designs, complemented by simulations of lighting performance and energy efficiency
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