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Proceedings Paper

Layered chalcogenide glass structures for IR lenses
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Paper Abstract

A technique for fabricating novel infrared (IR) lenses can enable a reduction in the size and weight of IR imaging optics through the use of layered glass structures. These structures can range from having a few thick glass layers, mimicking cemented doublets and triplets, to having many thin glass layers approximating graded index (GRIN) lenses. The effectiveness of these structures relies on having materials with diversity in refractive index (large Δn) and dispersion and similar thermo-viscous behavior (common glass transition temperature, ΔTg = 10°C). A library of 13 chalcogenide glasses with broad IR transmission (NIR through LWIR bands) was developed to satisfy these criteria. The lens fabrication methodology, including glass design and synthesis, sheet fabrication, preform making, lens molding and surface finishing are presented.

Paper Details

Date Published: 1 July 2014
PDF: 5 pages
Proc. SPIE 9070, Infrared Technology and Applications XL, 90702I (1 July 2014); doi: 10.1117/12.2050479
Show Author Affiliations
Daniel Gibson, U.S. Naval Research Lab. (United States)
Shyam Bayya, U.S. Naval Research Lab. (United States)
Jas Sanghera, U.S. Naval Research Lab. (United States)
Vinh Nguyen, U.S. Naval Research Lab. (United States)
Dean Scribner, Northrop Grumman Systems Corp. (United States)
Velimir Maksimovic, Northrop Grumman Systems Corp. (United States)
John Gill, Northrop Grumman Systems Corp. (United States)
Allen Yi, The Ohio State Univ. (United States)
John Deegan, Rochester Precision Optics, LLC (United States)
Blair Unger, BLU Optics, LLC (United States)

Published in SPIE Proceedings Vol. 9070:
Infrared Technology and Applications XL
Bjørn F. Andresen; Gabor F. Fulop; Charles M. Hanson; Paul R. Norton, Editor(s)

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