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Proceedings Paper

The production of 225 x 325 mm sapphire windows for IR (1 to 5 μm) applications
Author(s): John W. Locher; Herbert E. Bates; Steven A. Zanella; Evan C. Lundstedt; Charles T. Warner
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Paper Abstract

Edge Defined film Fed Growth (EFG) SaphikonTM sapphire crystals have been grown and successfully processed into windows measuring 225 x 325 mm with a thickness of 5.6 mm. More than 40 windows have been completed and assembled into customer hardware and delivered. The polished and coated windows have exhibited average transmission >93% from 1 to 5 mm and wavefront measurements of <0.1 waves rms (@ 0.633 μm) over a 125 mm aperture. Optical measurement data are presented and aspects of the crystal growth and polishing processes are discussed.

Paper Details

Date Published: 26 September 2003
PDF: 7 pages
Proc. SPIE 5078, Window and Dome Technologies VIII, (26 September 2003); doi: 10.1117/12.485701
Show Author Affiliations
John W. Locher, Saint-Gobain (United States)
Herbert E. Bates, Saint-Gobain (United States)
Steven A. Zanella, Saint-Gobain (United States)
Evan C. Lundstedt, Exotic Electro Optics (United States)
Charles T. Warner, Exotic Electro Optics (United States)


Published in SPIE Proceedings Vol. 5078:
Window and Dome Technologies VIII
Randal W. Tustison, Editor(s)

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