Magnesium Fluoride Optical Windows
Magnesium Fluoride Optical Windows
Newport's Magnesium Fluoride Optical Windows are transparent over a very wide 120 nm to 8 µm spectral range. Magnesium Fluoride is durable, resistant to both thermal and mechanical shock, and has a high laser damage threshold.
- High resistance to thermal and mechanical shock
- High transmittance from 120 nm to 8 µm
- < 1 arc minute parallelism
- Resistant to chemical attack
- Low surface reflectance even uncoated See All Features
| Compare | Description | Drawings, CAD & Specs | Avail. | Price | ||
|---|---|---|---|---|---|---|
 | MGW10Optical Window, Magnesium Fluoride, 5.0 mm Diameter, 1.0 mm Thick | In Stock | ||||
 | MGW11Optical Window, Magnesium Fluoride, 12.5 mm Diameter, 2.0 mm Thick | In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More | ||||
| MGW12Optical Window, Magnesium Fluoride, 25.0 mm Diameter, 3.0 mm Thick | In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More | ||||
 | MGW13Optical Window, Magnesium Fluoride, 50.0 mm Diameter, 3.0 mm Thick | In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More |
Specifications
- MaterialMagnesium Fluoride
- Antireflection CoatingUncoated
- Surface Flatnessλ/2 @ 632.8 nm
- Surface Quality40-20 scratch-dig
- Thickness Tolerance± 0.1 mm
- Parallelism< 1 arc minute
- Cleaning
- Clear ApertureCentral 90% of diameter
- Diameter Tolerance+0.0/-0.1 mm
- Thermal Expansion CoefficientParallel: 14 x 10-6 K-1 @ 310 K
Perpendicular: 8.9 x 10-6 K-1 @ 310 K - Thermal Limit14-15 W m-1 K-1 @ 300 K
Features
Ultra Broadband Applications
As Magnesium Fluoride has the lowest refractive index of all optical glasses, AR coatings are not required to have low surface reflectance. Therefore the windows are not limited to the spectral band of a broadband AR coating, permitting use at any wavelength from Deep UV to IR (120nm - 8 µm). This is ideal for applications requiring transparency across multiple wavelengths simultaneously, such as spectroscopy or fluorescence imaging of samples under vacuum. The windows may also be used in excimer laser applications due to transparency in the deep UV.
Durable Material
Magnesium fluoride is extremely durable compared to other materials which are transparent from the UV to IR spectrum, making it an excellent choice for many biological and military imaging applications.
