An Micro-Bandpasss (6.3≈7.6m) Filter for the Multichannel Scanning Radiometer
Source: International Journal of Infrared and Millimeter Waves, Volume 23, Number 4, April 2002 , pp. 535-544(10)
Abstract:Optical coatings are designed and produced for the multichannel scanning radiometer meteorological space instrument operating in the spectral range 6.3≈7.6m. First the choice of substrates and layers materials is discussed. Then the substrate temperatures dependent effects of three different Te-enriched PbTe single layers on the dispersion and absorption characteristics and carrier concentration are studied. The experimental results demonstrate that the performance of the coating made using PbTe + 0.3 at. % Te material is better than that of the others. Finally, details of the spectral design and manufacture of such a filter which meets the demanding bandwidth and transparency requirements of the application are presented. This design model is based on the optical and semiconductor properties of a multilayer filter containing PbTe layer materials in combination with the dielectric dispersion of ZnSe deposited on the a Ge substrate. Comparisons between the computed spectral performance of the model and spectral measurements from manufactured coatings over a wavelength range of 6.3≈7.6m are presented.
Document Type: Regular Paper
Affiliations: 1: Institute of Modern Physics, Fudan University, Shanghai 200433, People's Republic of China 2: Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai 200083, People's Republic of China
Publication date: April 1, 2002