Equipment goods
Calcite |
Crystal Structure
|
Crystalline rhombihedral
|
Density
|
2.7 g/cm3
|
Mohs Hardness
|
3
|
Hygroscopic Susceptibility
|
Low
|
Transparency Range
|
350nm ~ 2300nm
|
Thermal Expansion Coefficients
|
aa=24.39x10-6/K
|
ac=5.68x10-6/K
|
|
Crystal Class
|
Negative uniaxial with no=na=nb, ne=nc
|
Refractive Index
Birefringence (Δn=ne-no)
Walk-Off Angle at 45 deg(ρ)
|
no=1.6557, ne=1.4852, Δn = -0.1705, ρ=6.32 @633nm
no=1.6381, ne=1.4783, Δn = -0.1598, ρ=6.20 @1300nm
|
Sellmeier Equations (λ in um)
|
no2=2.69705+0.0192064/( λ2-0.01820)-0.0151624λ2
|
ne2=2.18438+0.0087309/( λ2-0.01018)-0.0024411λ2
|
Dimension Tolerance
|
±0.1mm
|
Optical Axis Orientation
|
±0.5deg
|
Wavefront Distortion
|
<λ/2@633nm</div>
|
Surface Flatness
|
<λ/4@633nm</div>
|
Surface Quality
|
20/10 Scratch and Dig
|
Parallelism
|
<15 arc seconds</div>
|
Perpendicularity
|
<10 arc minutes </div>
|
Clear Aperture
|
>90%
|
AR-Coating
|
Upon Request
|
Good deal: buying from seller
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