1 September 1989 Large Diameter Germanium Single Crystals For Infrared Optics
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Optical Engineering, 28(9), 281003 (1989). doi:10.1117/12.7977078
Abstract
Large single crystals, up to 200 mm in diameter, of high optical quality germanium have been grown by the Czochralski technique. Post-growth thermal treatment improves the optical homogeneity and reduces optical losses, as shown by measurements of refractive index gradients and modulation transfer function (MTF). A new approach for the piecewise combination of interferograms, as well as a polychromatic treatment of MTF, is presented.
G. Gaini, M. Azoulay, C. Shiloh, Y. Noter, A. Saya, H Galron, M. Roth, "Large Diameter Germanium Single Crystals For Infrared Optics," Optical Engineering 28(9), 281003 (1 September 1989). http://dx.doi.org/10.1117/12.7977078
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KEYWORDS
Crystal optics

Crystals

Germanium

Modulation transfer functions

Infrared radiation

Thermography

Refractive index

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