MgF2
Magnesium fluoride (MgF2) is a highly transparent and refractive material widely used in optics and photonics applications due to its exceptional properties.
High Transmission: MgF2 exhibits excellent transmission across a broad spectral range, from the ultraviolet (UV) to the infrared (IR) region. This makes it ideal for various optical components.
Low Refractive Index: Its relatively low refractive index compared to other optical materials helps minimize reflections and improve light transmission.
Hardness and Durability: MgF2 is a hard and durable material, resistant to scratches, abrasion, and chemical etching. This makes it suitable for applications in harsh environments.
Birefringence: While MgF2 is slightly birefringent (exhibits different refractive indices for different polarization states), this property can be controlled through proper crystal orientation to minimize its effects in optical systems.
Anti-Reflection Coatings: MgF2 is a popular material for creating anti-reflection coatings on lenses, prisms, and other optical elements to reduce unwanted reflections and improve image quality.
It is used to fabricate optical windows for various applications, including laser systems, spectroscopy, and imaging systems.
Laser Optics: MgF2 is suitable for use in laser optics, such as lenses, prisms, and beamsplitters, due to its high damage threshold and low absorption.
advantages:
Wide Spectral Transmission: Covers a broad range of wavelengths.
Low Reflection: Minimizes light loss due to reflections.
Durability: Resistant to scratches and chemicals.
Versatility: Can be used in various optical applications.
BaF2 Technical information
Refractive Index: 1.45 at 5 µm
Transmission Range: 0.15 to 12 µm
Density: 4.89 g/cm³
Melting Point: 1386°C
Thermal Conductivity: 11.72 W/m·K at 286 K
Hardness: Knoop 82 with 500g indenter
Specific Heat Capacity: 410 J/kg·K
Dielectric Constant: 7.33 at 1 MHz
Young's Modulus: 53.07 GPa
Shear Modulus: 25.4 GPa
Bulk Modulus: 56.4 GPa
Solubility in Water: 0.17 g/100g water at 23°C