Iceland Spar

Iceland Spar

Supplier
U-optic
Category
Crystallography
Origin
China

Calcite crystal is a natural birefringent material with a rhombohedral shape, large birefringence, and a wide transmission spectrum, with good optical performance from the visible to the near-infrared. Although calcite is relatively soft mechanically and easily scratched, this does not affect its wide application in polarizing devices. Calcite is mainly used in Glan prisms.

Specification Snapshot
Surface Quality
20/10
Clear Aperture Dimension
>90%
Parallelism
<15 arcsec
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Overview

Calcite crystal is a natural birefringent material with a rhombohedral shape, large birefringence, and a wide transmission spectrum, with good optical performance from the visible to the near-infrared. Although calcite is relatively soft mechanically and easily scratched, this does not affect its wide application in polarizing devices. Calcite is mainly used in Glan prisms.

Specifications

ParameterValue
Overview - Crystal StructureOrthorhombic crystal system
Overview - Density2.7 g/cm^3
Overview - DeliquescenceLow
Overview - Thermal Expansion Coefficientaa=24.39x10^-6/K;ac=5.68x10^-6/K
Overview - Crystal SystemNegative uniaxial crystal, no=na=nb, ne=nc
Overview - Refractive Index and Walk-off Angle at 45° (Δn=ne-no)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
Overview - Sellmeier Equation (λ in μm)no^2=2.69705+0.0192064/(λ^2-0.01820)-0.0151624λ^2 ne^2=2.18438+0.0087309/(λ^2-0.01018)-0.0024411λ^2
Pointing Accuracy±0.5°
Clear Aperture Dimension>90%
Transmitted Wavefront Distortion<λ/2@633nm
Parallelism<15 arcsec
Specification - Side Perpendicularity<10 arcmin

Datasheet

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Supplier Information

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U-optic
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Union Optic Inc., founded in 2004, is a high-tech company located in Optics Valley of China, specializing in research and development, production and sales of precision optical components. Union Optic has established a comprehensive quality management system and perfect rules and regulations since its foundation. By using enterprise ERP management system, Union Optic offers full product lifecycle support across a range of process, production, quality control, sales, logistics and finance into informatization management to keep it on a correct and efficient pace.

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Iceland Spar
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