Magnesium Fluoride (MgF2) is a tetragonal positive birefringent crystal.MgF2 has good chemical,mechanical and thermal characteristics compared with CaF2.Due to its high vacuum UV transmission and high damage threshold,MgF2 is usually used in VUV andexcimer laser windows,polarizers,lenses and etc.
Item No :
MgF2 MaterialProduct Origin :
FuZhouProperties:
| Transmission range: | 120nm ~ 7000nm |
| Thermal Expansion Coefficient: | ||a=13.7x10-6/K, ||c=8.48x10-6/K |
| Density: | 3.17 g/cm3 |
| Thermal Conductivity: | 0.0075W/M/K |
| Index of Refraction: | @405nm no=1.3836, ne=1.3957 |
Specifications:
| Diameter Tolerance: | +0.0, -0.1mm |
| Thickness tolerance | ±0.2mm |
| Clear aperture: | >80% (Small Size); >90% (Large Size) |
| Parallelism: | <1 arc min (General); <10 arc sec (High Precision) |
| Surface quality: | 80/50 (General); 40/20 (High Precision) |
| Flatness: | λ/2 (General); λ/8 (High Precision) |
| Coating: | Coating upon Request |
Why choose Magnesium Fluoride (MgF2) Material?
Magnesium fluoride (MgF₂) is a single-crystal material celebrated for its exceptional optical properties, distinguished by low refractive index and broad-band transparency in optical coating and precision optical components. Its crystalline structure enables high transmission from ultraviolet (150nm) to mid-infrared (8μm), featuring extremely low absorption loss in the deep UV range, coupled with strong chemical stability and weather resistance to maintain optical performance in humid or corrosive environments. With low thermal expansion and high laser damage threshold, MgF₂ is not only widely used as the core material for antireflective (AR) coatings to minimize surface reflections but also processed into UV lenses, optical windows, and prisms. It finds extensive applications in UV lithography systems, laser spectrometers, and infrared imaging devices, particularly suited for precision optical setups requiring low reflectivity and broad-band transmission.
Germanium (Ge) is widely used in far infrared wavelength,it is transparent from 2000nm to 17000nm.Germanium also has higher refractive index about 4 at 10.6 micron.Germanium is very popular in FLIR and imaging applications.Ge windows and lenses can be manufactured by MT-Optics,Inc.
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Germanium Windows are made from Germanium material, which has transparent range from 2 to 17 micron. MT-Optics,Inc. can kindly process this Ge as windows, mirrors, lenses etc.
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Sapphire is a single crystal aluminum oxide (Al2O3).Its Mohs hardness is 9,it is one of the hardest materials.Sapphire has good mechanical strength,and it is also transparent from visible to IR spectrum.So,it is always used as window material where scratch resistance is required.
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Magnesium Fluoride (MgF2) is a tetragonal positive birefringent crystal.MgF2 has good chemical,mechanical and thermal characteristics compared with CaF2.Due to its high vacuum UV transmission and high damage threshold,MgF2 is usually used in VUV andexcimer laser windows,polarizers,lenses and etc.
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Sapphire Window is an optical component crafted from sapphire material. It boasts a transparent range of 180 - 4500 nm, enabling transmission of light from the ultraviolet to the infrared spectrum. At 1000 nm, its refractive index is 1.755, contributing to its distinctive optical performance. Sapphire’s inherent hardness and thermal stability further enhance its utility in demanding environments.
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MgF₂ (Magnesium Fluoride) Window is an optical component fabricated from magnesium fluoride, a material renowned for its broad transparent range spanning from 120 to 7000 nm. This extensive range allows transmission of light from the ultraviolet to the infrared spectrum. At 7000 nm, it exhibits a refractive index of 1.376, contributing to its unique optical properties.
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Calcium Fluoride (CaF2) is a tetragonal positive birefringent crystal.MgF2 has good chemical,mechanical and thermal characteristics compared with CaF2.Due to its high vacuum UV transmission and high damage threshold,MgF2 is usually used in VUV andexcimer laser windows,polarizers, lenses and etc.
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CaF2 Windows are made from Calcium Fluoride material, which has transparent range from 170-7800nm. The refractive index is 1.399 at 5000nm. It has little hygroscopic susceptibility and high thermal expansion coefficient. CaF2 Windows are relatively soft and somewhat hygroscopic so polishing, coating and handling are more critical than UV Fused Silica windows.
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Zinc selenide (ZnSe) materials exhibit excellent light transmittance across a broad wavelength range (0.5μm to 22μm). They are commonly used as substrate materials for mirrors and beam splitters in high-power CO₂ laser systems. Additionally, their superior refractive index uniformity and consistency make them ideal for applications such as windows and lenses in thermal imaging systems, medical devices, industrial thermal radiation meters, and infrared spectrometers.
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Zinc sulfide (ZnS) exists in two material forms: a white multispectral material and a yellow virgin material. Both are chemically inert, featuring high purity, insolubility in water, moderate density, and ease of processing. Due to its broad transmission wavelength range (500–10000 nm), zinc sulfide (ZnS) is widely used in manufacturing infrared windows, domes, and infrared optical components.
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