产品描述
| 透光范围 | 420~5200nm | 120~8500nm | 200~2300nm |
| 晶体结构 | Trigonal, Space Group R3c | Trigonal, Space Group R3c | Trigonal, Space Group R3c |
| 晶系 | Positive Uniaxial | Positive Uniaxial | Negative Uniaxial |
| 含晶细胞 | a=b=0.515Å , c=13.863 Å | a=b=4.621 Å , c=3.053 Å | |
| 密度 | 4.64g/cm3 | 3.18g/cm3 | 2.65g/cm3 |
| 潮解性 | Low | Low | Low |
| 莫氏硬度 | 5 | 6 | 7 |
| 热膨胀系数 | aa =2.0 x 10-6/k@ 25℃ ac =2.2 x 10-6/k 25℃ | aa =6.23-9.25 x 10-6/k ac =10.86-14.54 x 10-6/k | aa =6.2 x 10-6/k ac =10.7 x 10-6/k |
| 光学均匀性 | 5 x 10-5/cm | 10-6/cm | 10-6/cm |
| 吸收系数 | 0.1%/cm @ 1064 nm | 0.07 at 0.2 μm; | 0.1%/cm @ 1064 nm |
| 0.02 at 5.0 μm | |||
| 在 45°时屈光指数，双折射，离散角（ρ） | ne =2.20263, no =2.28629 Δn=0.08366 | ne =1.38876, no =1.37698 Δn=0.01178 | ne =1.55170, no =1.54265 Δn=0.00905 |
| ρ =2.135 ° @ 633nm | ρ =0.488 ° @ 633nm | ρ =0.335° @ 633nm |
| 直径 | Max. 30~40mm | Max. 50mm | Max. 100mm |
| 长度 | Max. 25~35mm | Max. 100mm | Max. 100mm |
| 光洁度 | Better than 20/10 Scratch/Dig Per MIL-0-13830A | ||
| 光束偏移 | <10 arc seconds | ||
| 光轴方向 | +/-0.2 ° | ||
| 面形 | < λ/6 @633nm | ||
| 透过波前畸变 | < λ /4 @633nm | ||
| 镀膜 | Upon Specification | ||
