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Baf2 Laser Windows

Product Item : RT20220421001#
Category： Products
Substrate: Barium Fluoride
Coating: Uncoating/Coating/Polishing
Linear Thermal Expansion Coefficient: 18.1
Thermal Conductivity: 11.72 W/M.K
Product description：Barium Fluoride/Baf2 Laser Windows/Barium Fluoride Machining/Baf2 Optical Lens
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General Introduction: Barium Fluoride(BaF2)
Hellma Materials Barium Fluoride is the material of choice for wide bandwidth applications covering the VIS, near-IR and mid-IR range. It is an optical crystal grown from highly purified synthetic raw material and features a superior internal transmittance (T > 99% @7μm) enabling advanced applications in thermal imaging, night vision and surveillance imaging using integrated VIS and IR detector channels. Low spectral dispersion makes BaF2 the preferred optical material for aberration and color correction.
Barium Fluoride is widely used in VIS/IR applications.

Products Name: Barium Fluoride(BaF2)
Alias: Barium Fluoride(BaF2), Barium Fluoride, Barium Fluoride VIS, Barium Fluoride IR, Hellma Barium Fluoride, Barium Fluoride Windows, Hellma BaF2, hellma BaF2, Barium Fluoride optical materials, BaF2 optical materials, etc.

Main Characteristics:
Same to Calcium Fluoride, Hellma Materials large size Barium Fluoride crystals does specifically meet the requirements of astronomical optical instrumentation, It has the following main characteristics:
1). Featuring a consistently high transmittance covering the full spectrum of ultraviolet, visible and infrared wavelengths.
2). Low spectral dispersion makes BaF2 the preferred optical materials for aberration and color correction.
3). Critical optical parameters including high refractive index homogeneity and low stress birefringence enable high performance optical designs for the full range from next generation ground-based extremely large telescopes (ELTs) to portable refractors for semi-professional use.
4).High resistance of BaF2 against Gamma radiation exposure proven by transmission testing makes these materials a superior choice also for space borne optical instruments.

Thermal Properties:

Items	Value
Melting Point(ºC)	1386
Specific heat capacity	410 J / kg x K
Thermal conductivity@ 13ºC	11.72 W/M.K
Linear thermal expansion coefficient α(0 °C) (10-6/K)	18.1

Mechanical Properties:

Items	Value
Young's Modulus, E (25 °C) (Modulus of Elasticity)	53.07GPa
Shear Modulus, G (Modulus of Rigidity)	25.40GPa
Bulk Modulus, K @ 25 °C	56.40GPa
Posssion's Ration u	0.343
Knoop Hardness HK	82
Mohs Hardness	3.0
Density (g/cm3)	4.89

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