Calcite晶体
冰洲石是一种碳酸盐矿物和最稳定的碳酸钙(CaCO3)。
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- 描述
描述
冰洲石双折射晶体
冰洲石是一种碳酸盐矿物和最稳定的碳酸钙(CaCO3)。它是一个负的单轴晶体，主要用于可见光和近红外偏振器。它的菱面体具有高双折射，宽光谱传输特性。
冰洲石双折射晶体规格:
| Size: | max.30~45mm |
| Length: | max.25~35mm |
| Surface Quality: | 20/10 |
| Optical Deviation: | <3 arc min |
| Optical Axis Orientation: | +/-0.5° |
| Flatness: | < λ/4 @633nm |
| Wave Front: | < λ/4 @633nm |
| Coating: | According to custmer request |
Physical Properties:
| Transparency Range | 350~2300nm |
| Partical Shape | Crystalline rhombihedral |
| Density | 2.7g/cm3 |
| Thermal Expansion Coefficient | Low susceptibility to moisture |
| Mohs Hardness | 3 |
| Thermal Expansion Coefficient | aa=24.39×10-6/k; ac=5.68×10-6/k |
| Crystal Class | Negative uniaxial with no=na=nb, ne=nc |
| Refractive index, birefringence(Δ=ne-no) and walk-off angle at 45℃(ρ) | no=1.6557,ne=1.4852 Δn=-0.1705,ρ=6.20@630nm no=1.6629,ne=1.4885 Δn=-0.1705,ρ=6.20°@1300nm |
| Sellmeier Equation | no2=2.69705+0.0192064/(λ2-0.01820)-0.0151624λ2 ne2=2.18438+0.0087309/(λ2-0.01018)-0.0024411λ2 |
