冰洲石(Calcite)

 

冰洲石(Calcite)晶体是一种天然双折射材料,在可见到近红外具有比较好的光学性能。冰洲石可加工产品的尺寸较大,并且价格实惠,被广泛应用于偏振器件和补偿器件中。

应用:格兰棱镜、偏振分束器、补偿器等等..

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Specifications:

Dimension Tolerance:
+/-0.1mm
Optical Axis Orientation :
+/-0.5deg
Parallelism:
<10 arc secs
Perpendicularity:
<5 arc mins
Surface quality:
20/10
Flatness:
< λ/4 @632.8nm
Wavefront Distortion:
< λ/2 @632.8nm
Coating:
Coating upon Request
 
 

Properties:  

Crystal Structure
Crystalline rhombihedralCubic
Density
2.7 g/cm3
Transmission Range
350-2300nm
Mohs Hardness
3
Hygroscopic Susceptibility
Low
Thermal Expansion Coefficients(/CO

24.39X10-6 (C );  5.68X10-6 (A )

Refractive Indices

No= 1.66315,Ne= 1.48854,532nm

No=1.64237,Ne=1.47968,1064nm

Sellmeier Equation (λ in μm)
ne2=2.18438 + 0.0087309/(λ2-0.01018) - 0.0024411λ2

no2=2.69705 + 0.0192064/(λ2-0.01820) - 0.0151624λ2

 

Note: Kinds of sizes, cut angle, coating are available upon request.


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