Birefringent Crystals
Negotiable /Set
Min.Order:1 Set
Calcite is a negative uniaxial crystal that has high birefringence, wide spectral transmission and availability in reasonably sized rhombs.Although is a fairly soft crystal and is easily scratched, it is ideal material used as visible and near IR polarizers, such as Glan Thompson, and Glan Taylor Glan laser.
Physical and Optical Properties:
Crystal Structure | Crystalline rhombihedral |
Density | 2.7 g/cm3 |
Mohs Hardness | 3 |
Hygroscopic Susceptibility | Low |
Transparency Range | 350nm ~ 2300nm |
Thermal Expansion Coefficients | aa=24.39x10-6/K |
ac=5.68x10-6/K | |
Crystal Class | Negative uniaxial with no=na=nb, ne=nc |
Refractive Index Birefringence (Δn=ne-no) Walk-Off Angle at 45 deg(ρ) | no=1.6557, ne=1.4852, Δn = -0.1705, ρ=6.32 @633nm no=1.6381, ne=1.4783, Δn = -0.1598, ρ=6.20 @1300nm |
Sellmeier Equations (λ in um) | no2=2.69705+0.0192064/( λ2-0.01820)-0.0151624λ2 |
ne2=2.18438+0.0087309/( λ2-0.01018)-0.0024411λ2 |
Capabilities:
Dimension Tolerance | ±0.1mm |
Optical Axis Orientation | ±0.5deg |
Wavefront Distortion | <λ/2@633nm |
Surface Flatness | <λ/4@633nm |
Surface Quality | 20/10 Scratch and Dig |
Parallelism | <15 arc seconds |
Perpendicularity | <10 arc minutes |
Clear Aperture | >90% |
AR-Coating | Upon Request |