Issued Patents 2011
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7968074 | Method for making low-stress large-volume crystals with reduced stress birefringence and more uniform refractive index and crystals made thereby | Joerg Staeblein, Gunther Wehrhan, Christian Kusch | 2011-06-28 |
| 7883578 | Process for preparing CaF2 lens blanks especially for 193 nm and 157 nm lithography with minimized deffects | Michael Selle, Erik Foerster | 2011-02-08 |
| 7873084 | Arrangement and method for preventing the depolarization of linear-polarized light during the transmission of light through crystals | Ute Natura, Martin Letz | 2011-01-18 |
| 7868708 | Method and apparatus for making a highly uniform low-stress single crystal by drawing from a melt and uses of said crystal | Gunther Wehrhan, Daniel Rytz, Klaus Dupre, Lothar Ackermann | 2011-01-11 |