Yantai ZK Optics Co., Ltd.
Custom fabrication of high precision glass parts. Spirit of enterprise: Integrity, Pragmatism, Innovation, Win-win, Appreciation. Tenet of enterprise: the Supremacy of Customer, the Excellence in
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Calcite Crystal Used In Polarization Devices
Calcite crystal is a kind of natural birefringent material, which has good optical properties in near infrared. Calcite crystal is widely used in polarization devices because of its large size and low price.
Application: Gran prism, polarization beam splitter, etc.
Calcite Crystal Characteristics
| Using Wavelength | 350~2300nm |
| Density | 2.7 g/cm 2 |
| Deliquescence | Non deliquescence |
| Mohs hardness | 3 |
| Thermal conductivity | αa=24.39 X10-6/K |
| ac=5.68X10-6/K | |
| Damage threshold | >1GW/cm2 |
| Refractive index |
No= 1.66315,Ne= 1.48854,532nm No=1.64237,Ne=1.47968,1064nm |
| 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 |
Processing Specifications
| Material | Calcite crystal |
| Processing dimension | 1mm-40mm |
| Surface quality | 10-5 |
| Optical axis accuracy | 6 arc min |
| Parallelism | <10 arc sec |
| Flatness | λ/4@633nm |
| Clear aperture | >90% |
| Coating | Coating according to customer’s requirement |
| Bracket | Custom according to customer’s requirement |