Study on the fir bandpass filters consisting of two resonant grids
- Cite this article as:
- Guangzhao, Z., Jinglu, H. & Jinfu, Z. Int J Infrared Milli Waves (1986) 7: 237. doi:10.1007/BF01013268
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A series of interference filters composed of two resonant grids, with resonant wavelengths λm <200μm, were constructed, and the dependence of the spectral characteristics on the separation of the two grids was studied experimentally in detail. The multiple-beam interference theory was applied to analyse the experimental results. The theoretical calculations and the experimental results are in good agreement. A method is presented, by which double-grid interference filters can be designed with the computer aid.