25 September 1996 Study of thermo-optical tunable reflecting filter based on dual interference effect
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Abstract
A novel tunable optical filter has been proposed and investigated here, which is a thin film-slab substrate combination system, operating on principle of Dual Interference Effect introduced first time. According to theoretical analysis, the reflectance for a specific wavelength varies periodically with the changing of refractive index of the slab substrate for a given thickness of film. Experimentally, the tested samples are fabricated by depositing approximately 90 nm SnO2 semiconductor film on 3 mm Na-glass substrate, the measured ratio of reflectances at operating wavelength 632.8 nm/670 nm is as high as 15 dB.
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Bing Zheng, Bing Zheng, Zheng Chen, Zheng Chen, } "Study of thermo-optical tunable reflecting filter based on dual interference effect", Proc. SPIE 2894, Detectors, Focal Plane Arrays, and Applications, (25 September 1996); doi: 10.1117/12.252099; https://doi.org/10.1117/12.252099
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