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Calcite
Calcite Crystal
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 Taylor, Glan Thompson and Glan laser.
Specifications:
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Dimension Tolerance:
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+/-0.1mm
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Optical Axis Orientation :
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+/-0.5deg
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Parallelism:
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<10 arc secs
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Perpendicularity:
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<5 arc mins
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Surface quality:
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20/10
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Flatness:
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< λ/4 @632.8nm
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Wavefront Distortion:
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< λ/2 @632.8nm
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Coating:
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Coating upon Request
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Properties:
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Crystal Structure
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Crystalline rhombihedralCubic
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Density
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2.7 g/cm3
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Transmission Range
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350-2300nm
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Mohs Hardness
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3 |
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Hygroscopic Susceptibility
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Low
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Thermal Expansion Coefficients（/CO）
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24.39X10-6 （C ）; 5.68X10-6 （A ） |
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Refractive Indices
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No= 1.66315，Ne= 1.48854，532nm No=1.64237，Ne=1.47968，1064nm |
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Sellmeier Equation (λ in μm)
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ne2=2.18438 + 0.0087309/(λ2-0.01018) - 0.0024411λ2 |
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no2=2.69705 + 0.0192064/(λ2-0.01820) - 0.0151624λ2 |
Note: Kinds of sizes, cut angle, coating are available upon request.
