Chemistry of inorganic compounds – Halogen or compound thereof
Reexamination Certificate
2011-06-28
2011-06-28
Song, Matthew J (Department: 1714)
Chemistry of inorganic compounds
Halogen or compound thereof
C423S489000, C423S490000, C117S073000, C117S002000, C117S003000, C117S004000
Reexamination Certificate
active
07968074
ABSTRACT:
The method produces low-stress, large-volume crystals with low birefringence and uniform index of refraction. The method includes growing the crystal with larger than desired dimensions including diameter and height from a melt; cooling and tempering the crystal with the larger than desired dimensions and after the cooling and tempering removing edge regions of the crystal with the larger than desired dimensions so that a diameter reduction and a height reduction of at least five percent occurs respectively and so that the crystal has the desired dimensions of diameter and height. No further tempering takes place after removing of the edge regions.
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Technical Information Advanced Optics, TIE-26: Homogenety of Optical Glass, Jul. 2004 (In English).
Metrology: Homogenety of Refractive Index; Stress Birefringence Retardation, Mar. 25, 2010 (In English).
Kusch Christian
Parthier Lutz
Staeblein Joerg
Wehrhan Gunther
Hellma Materials GmbH & Co. KG
Song Matthew J
Striker Michael J.
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