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silicon based narrow line-width rugate filters. Opt Mater 2007, 29:619–622. 10.1016/j.optmat.2005.10.012CrossRef 15. Kronast W, Mescheder U, Müller B, Nimo A, Braxmaier C, Schuldt T: Development of a tilt actuated micromirror for
applications in laser interferometry. In MOEMS-MEMS. International Society for Optics and Photonics; 2010:75940O-75940O. 16. Mescheder U, Bauersfeld M-L, Kovacs A, Kritwattanakhron J, Muller B, Peter A, Ament C, Rademacher S, Wollenstein J: MEMS-based air quality sensor. In International Solid-State Sensors, Actuators and Microsystems Conference, 2007. TRANSDUCERS 2007, June 10–14 2007; Lyon, France. New York: IEEE; 2007:1417–1420.CrossRef Competing interests The described tunable optical filter and the system concept have been submitted for a patent. Authors’ contributions UM, AK, and AI worked out the idea of dual tunability. UM supervised the master 4��8C thesis work of IK and the work on development of the MOEMS tilting system for large deflection angles, and supplied the research activities with fruitful comments. IK conducted the tunability experiments and simulations as a part of his master thesis. AK led all the experimental and simulation activities and supervised the master thesis work of IK. AI developed the fabrication process for the photonic crystals and fabricated them, made initial experimental measurements on tilting, designed the optical system for the miniaturized concept, and made the final formatting and proof-reading of the paper.