Calcite Crystal
Features and advantages:
- Large Birefringence
- Wide Spectral Range and High Transmittance
- Pure Composition
PRODUCT
Detail
Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3).It's a negative uniaxial crystal and mostly used as visible and near IR polarizers. It has high birefringence, wide spectral transmission and availability in reasonably sized rhombs.
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Calcite Properties
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Wavelength
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350~2300nm
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Density
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2.7 g/cm 2
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Mohs Hardness
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3
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Thermal Conductivity
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αa=24.39 X10-6/K
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ac=5.68X10-6/K
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Damage Threshold
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1GW
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Refractive index
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No= 1.66315，Ne= 1.48854，532nm
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No=1.64237，Ne=1.47968，1064nm
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Sellmeier equation (λ in μm)
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no2=2.69705 + 0.0192064/(λ2-0.01820) - 0.0151624λ2
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ne2=2.18438 + 0.0087309/(λ2-0.01018) - 0.0024411λ2
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Standard Specifications
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Dimensions（mm）
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Max. 30-40mm
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Lenght mm
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Max. 25-35mm
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Surface quality
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40/20
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Crystal Orientation
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12′
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Parallelism
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20″
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Flatness
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λ/4 @ 633 nm
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Clear aperture
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＞90%
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Coating
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P coating or AR coating
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Mount
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Upon request
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