Specifications:
| Material | Calcite Crystals | Wavelength | 350-2300nm |
| Size (mm) | 0.2-60mm | Flatness | λ/8 |
| Surface Quality | 20/10 S/D | Clear Aperture | > 95% of full aperture |
| Parallelism | <10 arc sec | Optical Axis Orientation | < 6 arc min |
| Coating | Upon customer's request |
Basic Properties:
| Density | 2.7 g/cm3 | Melting Point | 730℃ |
| Mohs Hardness | 3 | Transparency Range | 350-2300nm |
| Thermal Expansion Coefficients（/℃） | aa=24.39×10-6/K ac=5.68×10-6/K |
Refractive Index | no = 2.260 n3 = 2.142 |
| Damage Threshold | >1GW/cm2 | Sellmeier Equation (λ in μm) | no2=2.69705 + 0.0192064/(λ2-0.01820) - 0.0151624λ2
ne2=2.18438 + 0.0087309/(λ2-0.01018) - 0.0024411λ2 |
Optical calcite crystals are a kind of natural mineral, single calcite crystal is a negative uniaxial crystal with a large birefringence over the wide transmission spectral range from 200nm to 2500nm. Although calcite is a quite soft crystal that is susceptible to scratch, it is still an excellent material for manufacturing polarizing prisms, beam-divergent elements, laser gates, and other optical devices.
Hangzhou Shalom EO provides various forms and dimensions of optical-grade calcite crystals. We also offer prisms, paired prisms, and polarizers made from calcite crystals: Glan Thompson Prisms, Glan Taylor Prisms, and Glan Laser Prisms, Group Velocity Delay Compensators in femtosecond lasers.
