Near infrared interference filter design and the production with ion-assisted deposition techniques

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2012
Aydoğdu, Selçuk
Near infrared region (NIR) of the electromagnetic spectrum (EM) is defined as 700nm to 1400nm wavelength interval by International Commission on Illumination(CIE). This wavelength interval is extensively used for target acquisition, night vision, wireless communication etc. Therefore, filtering the desired portion of EM spectra becomes a need for that kind of applications. Interference filters are multilayer optical devices which can be designed and produced for the desired wavelength intervals. The production of near infrared interference filters is a process of depositing thin material layers on the suitable substrates. In this thesis, a multilayer NIR filter will be designed for a selected wavelength interval by the use of di erent materials. Then, transmission quality, thermal stability, dependence of the transmission values on the incoming beam angle, performance and durability of the filter will be studied.
Citation Formats
S. Aydoğdu, “Near infrared interference filter design and the production with ion-assisted deposition techniques,” M.S. - Master of Science, Middle East Technical University, 2012.