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Basic Properties of Calcite Crystal
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Transparency Range: 350 - 2300 nm |
Transmission Curve |
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Crystal Symmetry: Trigonal, R3c |
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Lattice Constants: a=b=4,994A, c=17,081A |
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Density: 2.71 g/cm3 |
Damage Threshold ( 10ns, 10Hz)
at 1064 nm - 100 MW/cm2
at 532 nm - 50 MW/cm2 |
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Optical Homogeneity: Δn < 10-6/cm
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Mohs Hardness: 3 |
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Thermal Expansion Coefficients: |
αa = 4.9 x 10-6/K
αc = 25.1 x 10-6/K
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Linear Absorption Coefficients: α<0.01cm-1 from 400 to 700 nm |
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Sellmeier Equations:
(λ
in µm)
:
no2=2.69705
+ 0.0192064/(λ2-0.01820)-0.0151624λ2
ne2=2.18438
+ 0.0087309/(λ2-0.01018)-0.0024411λ2 |
| Wavelength(nm) |
no |
ne |
Birefringence
(Δn=ne-no) |
Walk-off Angle
at 45° |
|
1064 |
1.6423 |
1.4797 |
-0.162 |
5.93° |
|
800 |
1.6487 |
1.4821 |
-0.166 |
6.06° |
|
632.8 |
1.6557 |
1.4852 |
-0.171 |
6.18° |
|
532 |
1.6629 |
1.4886 |
-0.174 |
6.30° |
|
400 |
1.6823 |
1.4974 |
-0.185 |
6.61° |
|
355 |
1.6951 |
1.5032 |
-0.192 |
6.82° |
|
266 |
1.7497 |
1.5259 |
-0.224 |
7.74° |
* Calcite crystal is a natural mined material, not synthetic
material. Defects in a calcite crystal ( a large crystal in particular
) can cause scattering and absorption within the bulk.
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