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27 April 2020 New NRL glasses for multispectral imagers in visible to LWIR (Conference Presentation)
Daniel Gibson, Michael Hunt, Shyam S. Bayya, Vinh Nguyen, Daniel Rhonehouse, Jas Sanghera, Jay Vizgaitis
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Proceedings Volume 11403, Advanced Optics for Imaging Applications: UV through LWIR V; 114030A (2020) https://doi.org/10.1117/12.2560853
Event: SPIE Defense + Commercial Sensing, 2020, Online Only
Abstract
NRL is developing new glasses that transmit within the visible to LWIR range for use in multispectral imaging. We had previously developed NRL glasses which transmit in 0.9 to > 12 µm in wavelength, with refractive index ranging from 2.38 to 3.17, to expand the glass map and provide compact solutions to multispectral imaging systems. These glasses were specifically designed to have comparable glass molding temperatures and thermal properties so that they can be laminated and co-molded into optics with reduced number of air-glass interfaces (lower Fresnel reflection losses). These NRL glasses also have negative or very low dn/dT, making it easier to athermalize the optical system. A set of NRL glasses can be diffused to make infrared graded index (IR-GRIN) optics. Our multispectral optics designs using these new materials demonstrate reduced size, complexity and improved performance. The glass database compatible with Zemax and CodeV is available for distribution. We are adding n
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Daniel Gibson, Michael Hunt, Shyam S. Bayya, Vinh Nguyen, Daniel Rhonehouse, Jas Sanghera, and Jay Vizgaitis "New NRL glasses for multispectral imagers in visible to LWIR (Conference Presentation)", Proc. SPIE 11403, Advanced Optics for Imaging Applications: UV through LWIR V, 114030A (27 April 2020); https://doi.org/10.1117/12.2560853
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KEYWORDS
Glasses
Multispectral imaging
Imaging systems
Long wavelength infrared
Databases
Optical design
Glass molding
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