1. Asahi Glass
2. Compagnie de Saint-Gobain S.A.
3. Corning Incorporated
4. Diamonex
5. Edmund Optics
6. Essilor Of America Inc.
7. Guardian Industries
8. Jockimo Inc.
9. Monocrystal
10. Nippon Electric Glass
11. Precision Sapphire Technologies
12. Rubicon Technology
13. Schott AG
14. Swiss Jewel Company
15. Thorlabs