30 May 2018 Raman and CT scan mapping of chalcogenide glass diffusion generated gradient index profiles
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Gradient index (GRIN) lenses have been created for imaging in the infrared regime by diffusion of chalcogenide glasses. The GRIN lenses are shaped using a combination of precision glass molding and single point diamond turning. The precision glass molding step, is known to cause a drop in the index of refraction in both oxide and chalcogenide glasses. This drop is a direct result of the cooling rate during the molding process. Since the GRIN lenses have an index of refraction profile created by diffusion of multiple chalcogenide glasses, we would expect that the index drop would vary as a function of position. In this paper we investigate the expected profile change due to the index drop of the constituent chalcogenide glasses, as well as report performance data on the GRIN lenses.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
G. P. Lindberg, G. P. Lindberg, J. Cruz, J. Cruz, B. Unger, B. Unger, J. Deegan, J. Deegan, R. Benson, R. Benson, D. Gibson, D. Gibson, S. Bayya, S. Bayya, J. Sanghera, J. Sanghera, V. Nguyen, V. Nguyen, M. Kotov, M. Kotov, "Raman and CT scan mapping of chalcogenide glass diffusion generated gradient index profiles", Proc. SPIE 10627, Advanced Optics for Defense Applications: UV through LWIR III, 106270C (30 May 2018); doi: 10.1117/12.2305012; https://doi.org/10.1117/12.2305012


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