14 November 2007 1.06μM/LWIR dual band antireflection coatings for optical windows
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Proceedings Volume 6722, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 67223E (2007); doi: 10.1117/12.783532
Event: 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2007, Chengdu, China
Abstract
1.06μm / LWIR dual band antireflection coatings were designed and prepared onto ZnSe substrate. Resonance field effects were investigated at the designing stage to improve laser damage threshold of the coatings, and films were prepared onto substrates with different surface quality and properties of the deposited films were investigated. The packing density and mechanical properties of ZnS films were improved by experiment analysis of ZnS prepared by IAD and optimization of the parameters of this technique. The technique properties of the materials dispersive absorption data based on optimized parameters were stable, and the optical property of the deposited films was improved. Films with transmittance of above 96.5% in the 7.7~10.5 μm region and 94% at 1.064 μm and laser damage threshold above 85MW/cm2 were prepared with such parameters, and the dual band AR coatings passed environmental tests specified by MIL-C-675C. The coated ZnSe windows meet with the demands of electro-optical systems, in which laser and IR works in common aperture, serviced in battlefield environment.
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Changxin Xiong, Linfeng Yang, Qiantao Li, "1.06μM/LWIR dual band antireflection coatings for optical windows", Proc. SPIE 6722, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 67223E (14 November 2007); doi: 10.1117/12.783532; https://doi.org/10.1117/12.783532
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KEYWORDS
Antireflective coatings

Zinc

Laser damage threshold

Transmittance

Absorption

Long wavelength infrared

Thin film coatings

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