Magnesium Fluoride (MgF₂) Optical Window

Magnesium Fluoride (MgF₂) Optical Window

Product Overview
Magnesium Fluoride (MgF₂) is an excellent optical material suitable for deep ultraviolet (DUV), vacuum ultraviolet (VUV), visible, and infrared applications. It is one of the most important low-refractive-index window materials and is widely used in UV and mid-infrared optical systems.

Transmission Range: 130–10000 nm
MgF₂ offers:
High transmission in the UV region (down to 130 nm)
Good transmission in the mid-IR region (3–10 µm)
Low refractive index
Excellent environmental stability
Widely used as an IR optical window material
Optical Performance (1 mm thickness typical)
High transmission across UV–Visible–Near IR range.
Technical Specifications
Crystal Structure: Tetragonal
Standard Orientation: (001)
Surface Finish: Polished (single-side or double-side available)
Dimensional Tolerance:
Diameter / Length tolerance: +0 / -0.1 mm
Thickness tolerance: ±0.1 mm

Optical Quality:
Parallelism: < 5 arc sec (or better)
Surface Quality: 40-20 scratch/dig (or better)
Surface Flatness: λ/4 @ 633 nm (or better)
Edge Chamfer: 0.2 mm × 45°

Available Forms:
Round windows
Square substrates
Ultra-thin wafers
Custom crystal orientation available

Applications:
Deep UV optics
Vacuum UV systems
UV laser windows
IR optical windows
Spectroscopy systems
Scientific instruments

Customization:
Custom sizes, thickness, crystal orientation, and surface specifications are available upon request.
Bulk orders are welcome.