Barium Fluoride Plano-concave Lens

Barium fluoride plano-concave lenses are composed of a plane and a concave sphere, which can produce negative spherical aberration, and are often used in systems to expand the beam or increase the focal length to balance the deviation of other lenses. It is used in telescope, microscope, sight, laser and optical fiber. In the ultraviolet, visible and infrared fields, barium fluoride plano-concave lenses have higher transmittance and lower scattering and reflection losses. In addition, barium fluoride flat concave lens also has high hardness and wear resistance, can withstand high temperature and pressure, so it also has a good application effect in extreme environments such as high temperature and high pressure.

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The product undergoes multiple inspections before being stored, and the quality is guaranteed. Please use it with confidence.

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If you need customization or bulk production, please contact us online and we will offer you a discounted price.

	Dia(mm)	Focal Length(mm)	Center Thickness(mm)	Edge Thickness(mm)	Design Wavelength(μm)	Radius of Curvature(mm)	Surface Quality
	Screen Reset 2-300	Screen Reset 15-5000	Screen Reset 0.12-60	Screen Reset Custom	Screen Reset Custom	Screen Reset Custom	Screen Reset 60-40
More+ Less	2-300	15-5000	0.12-60	Custom	Custom	Custom	60-40
Barium Fluoride Plano Concave Lenses Number：PBa04- Dia(mm)：2-300 Focal Length(mm)：15-5000 Center Thickness(mm)：0.12-60 Edge Thickness(mm)：Custom Design Wavelength(μm)：Custom Radius of Curvature(mm)：Custom Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Barium Fluoride（BaF2） PV@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant

Material Data
Optical Properties
Transmission Range	0.15-14μm
Transmittance	>94%@0.35nm-10.8μm
Refractive Index	1.462@2.58μm 1.45@5μm
Reflection Loss	6.8%@2.58μm(both surfaces) 6.5%@5μm(both surfaces) 5.3%@10.35μm(both surfaces)
Absorption Coefficienet	3.2×10-4@6μm
Structure	Cubic Crystal System
Cleavage Planes	<111>
Physical Properties
Density [g/cm3]	4.89
Melting Point [℃]	1386
Thermal Conductivity [W/(m×K)]	11.72 @ 286K
Thermal Expansion [10-6/K]	18.1 @ 273K
Knoop Hardness [kg/mm2]	82
Specific Heat Capacity [J/(kg×K)]	410
Dielectric Constant	7.33 @ 1 MHz
Young's Modulus (E) [GPa]	53.07
Shear Modulus(G) [GPa]	25.4
Bulk Modulus(K) [GPa]	56.4
Poisson Coefficient	0.343
Chemical Properties
Solubility / g/L	1.7g @ 20℃
Molecular Weight / g/mol	175.3238