4 May 2007 Reduced angle-shift infrared bandpass filter coatings
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Infrared optics are often expected to perform over a wide range of angles of incidence, over a selected bandpass. For the best performance, it is often desired that the shift of spectral features, and the splitting between s and p polarizations, be minimized. These issues can be mitigated to a large extent by design, particularly over a narrow range of angles. However, the availability of high index materials throughout a stack design can greatly improve the performance at a given coating thickness, or greatly reduce the overall thickness required to achieve a design. Here we discuss several designs that have been achieved via hydrogenated silicon in multilayers, which demonstrate improved performance at oblique angles of incidence.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
B. M. Lairson, B. M. Lairson, J. Mosier, J. Mosier, K. Gibbons, K. Gibbons, J. H. Sternbergh, J. H. Sternbergh, M. A. George, M. A. George, } "Reduced angle-shift infrared bandpass filter coatings", Proc. SPIE 6545, Window and Dome Technologies and Materials X, 65451C (4 May 2007); doi: 10.1117/12.719347; https://doi.org/10.1117/12.719347


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