| Company Name | | Calcium fluoride |  |
| | Fused silica |  |
| | Glass |  |
| | Graded-index glass |  |
| | Low-expansion ceramics |  |
| | Magneto-optical materials |  |
| | Plastic |  |
| | Quartz |  |
| | Scintillating plastic |  |
| | Silicate glass |  |
| | Infrared Materials-Alkali halides (not LiF) |  |
| | Infrared Materials-Arsenic triselenide |  |
| | Infrared Materials-Arsenic trisulfide |  |
| | Infrared Materials-Diamond |  |
| | Infrared Materials-KRS-5 |  |
| | Infrared Materials-Lithium fluoride |  |
| | Infrared Materials-Oxides (AOv(3), MgO, etc) |  |
| | Infrared Materials-Sapphire |  |
| | Infrared Materials-Silicon carbide |  |
| | Infrared Materials-Strontium titanate |  |
| | Semiconductor Materials-CdTe |  |
| | Semiconductor Materials-GaAs |  |
| | Semiconductor Materials-Gallium nitride |  |
| | Semiconductor Materials-Germanium |  |
| | Semiconductor Materials-Other |  |
| | Semiconductor Materials-Silicon |  |
| | Semiconductor Materials-Yttrium Iron Garnet (YIG) |  |
| | Semiconductor Materials-ZnS/ZnSe |  |
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