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Optical Materials

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Optical Materials

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Newport offers a wide variety of spherical and aspherical lenses made from BK 7, UV grade fused silica, Infrared grade Calcium Fluoride (CaF2), Magnesium Fluoride (MgF2), AMTR and Zinc Selenide materials. For applications in the visible and infrared up to about 2.1 µm, BK 7 offers excellent performance at a good value. In the ultraviolet down to 195 nm, UV fused silica is a good choice. UV fused silica also has excellent transmission in the visible and infrared up to about 2.1 µm, better homogeneity, and a lower coefficient of thermal expansion than BK 7. CaF2 and MgF2 are excellent choices for deep UV or infrared applications—for custom applications, Newport can provide quotes on a build-to-print basis. For common optical materials, this technical note offers specifications for important basic parameters such as index of refraction, transmission across various wavelength ranges, reflectance, Abbe Number, coefficient of thermal expansion, conductivity, heat capacity, density, Knoop hardness, and Young's modulus.

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