Used as transparent barriers for sending and receiving light between two phases under varying conditions in temperature pressure chemical composition cleanliness and phase. Windows of synthetic optical sapphire crystal are highly abrasion-resistant with hardness approaching that of diamonds. The material allows transmission of light in the range from ultraviolet to near-infrared.
Standard Specifications
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Items
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Standard Precision
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High Precision
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Material
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Anisotropic crystalline synthetic sapphire
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Density
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3.98 g/cm3
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Refractive Index
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1.833 (265nm)
1.793 (365nm)
1.785 (405nm)
1.76 (630nm)
1.755 (1014nm)
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Diameter
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Ф 5 mm – Ф 50.8 mm
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Dimension Tolerance
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+0.0/-0.2 mm
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+0.0/-0.05mm
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Thickness Tolerance
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± 0.2 mm
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± 0.05mm
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Clear Aperture
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> 90%
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Parallelism
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< 3 arc minutes
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< 10 arc seconds
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Flatness
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λ at 632.8 nm
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λ/4 at 632.8 nm
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Surface Quality
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scratch and dig 60-40
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scratch and dig 40-20
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Bevel
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0.5 (0/-0.3) mm
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