Number | Name | Date | Kind |
---|---|---|---|
2149076 | Stockbarger | Feb 1939 | A |
2214976 | Stockbarger | Sep 1940 | A |
4038201 | Hargreaves | Jul 1977 | A |
4053572 | Moss et al. | Oct 1977 | A |
5215631 | Westfall | Jun 1993 | A |
6201634 | Sakuma et al. | Mar 2001 | B1 |
Number | Date | Country |
---|---|---|
WO 0075405 | Dec 2000 | WO |
WO 0075697 | Dec 2000 | WO |
Entry |
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Chernevskaya et al., Optical Characteristics of Large Single Crystals of Fluorides, Optical Technology, vol. 40, No. 6, Jun. 1973. |