Large diameter germanium single crystals for infrared optics.

Details Large diameter germanium single crystals for infrared optics. Large diameter germanium single crystals for infrared optics.

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989opten..28.1003g&link_type=abstract

Opt. Eng., Vol. 28, No. 9, p. 1003 - 1008

Physics

Optical Materials: Infrared Radiation

Scientific paper

Large single crystals, up to 200 mm in diameter, of high optical quality germanium have been grown by the Czochralski technique. Postgrowth 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.

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