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Calcite Crystals

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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


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

Single calcite crystals is a negative uniaxial crystals which has a high birefringence (double refraction), it has a wide transmission spectral range from 200nm to 2500nm. Although is a fairly soft crystal and is easily scratched, it is still an ideal material for manufacturing polarizing prisms, beam divergent elements, laser gates and other optical devices.  

Hangzhou Shalom EO provide the prisms and polarizer made from calcite crystals: Glan Thompson Prisms, and Glan Taylor Prisms and Glan Laser Prisms, it is also used to make the Group Velocity Delay Compensators in femtosecond lasers.