CONFERENCE PROCEEDINGS
Advanced Search
Home > Journals > Opt. Eng. > Volume 52 > Issue 8 > Article
Open Access
26 August 2013 Optical and thermal properties of spinel with revised (increased) absorption at 4 to 5 μm wavelengths and comparison with sapphire
Daniel C. Harris, Linda F. Johnson, Robert Seaver, Tod Lewis, Giorgio Turri, Michael A. Bass, David E. Zelmon, Nicholas Haynes
Author Affiliations +
Optical Engineering, Vol. 52, Issue 8, 087113 (August 2013). https://doi.org/10.1117/1.OE.52.8.087113
Abstract
Infrared absorption of high-quality, commercial, polycrystalline MgAl2O4 spinel is ∼40% greater in the range of 3.8 to 5.0 μm than the value predicted by the computer code OPTIMATR®, which has been used for window and dome design for more than 20 years. As a result, spinel and a -plane sapphire windows designed to support the same external pressure with the same probability of survival have approximately the same infrared absorptance in the range 3.8 to 5.0 μm. c -Plane sapphire has greater absorptance than spinel in the range 3.8 to 5.0 μm. Spinel has two weak absorption bands near 1.8 and 3.0 μm. At 1.064 μm, the laser calorimetric absorption coefficient of spinel is 10 to 50 times greater than that of sapphire. New measurements of specific heat capacity, thermal expansion, thermal conductivity, elastic constants, and refractive index (including dn/dT) of spinel are reported.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
Citation Download Citation
Daniel C. Harris, Linda F. Johnson, Robert Seaver, Tod Lewis, Giorgio Turri, Michael A. Bass, David E. Zelmon, and Nicholas Haynes "Optical and thermal properties of spinel with revised (increased) absorption at 4 to 5 μm wavelengths and comparison with sapphire," Optical Engineering 52(8), 087113 (26 August 2013). https://doi.org/10.1117/1.OE.52.8.087113
Published: 26 August 2013
JOURNAL ARTICLE
 12 PAGES
DOWNLOAD PAPER SAVE TO MY LIBRARY
GET CITATION
Lens.org Logo
CITATIONS
Cited by 41 scholarly publications.
Advertisement
Advertisement
KEYWORDS
Spinel
Absorption
Sapphire
Calorimetry
Transmittance
Refractive index
Thermography
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top