Barium Fluoride Biconcave Lens

Barium fluoride biconcave lenses have concave surfaces on both sides and are commonly used for applications such as beam expansion, projection, and beam alignment. Using barium fluoride as the substrate material, it has high hardness, resistance to mechanical and thermal shock, and good transmittance in the ultraviolet, visible, and infrared fields. Used in lenses, beam splitters, filters, prisms, and window panels in low-temperature refrigeration imaging systems, aerospace optical systems, and laser optical systems. Can be coated with MgF2, UV-AR, UV-VIS, VIS-EXT, VIS-NIR, NIR I, NIR II, Telecom NIR, SWIR, SWIR, YAG-BBAR and other film systems.

I want to customize Consult

Price
Invoice
Quality
Deivery
Logistics
Receive
Returns
Customized

Please leave a message or inquire about the price online to ensure a satisfactory price for you.

All products are provided with invoices, with a tax point of 13.

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

Spot products, shipped within 48 hours. For non stock or customized products, please consult.

International order logistics include DHL, FedEx, TNT, and EMS

When receiving the product, please ensure the integrity of the product packaging box first. If there is serious damage to the appearance, please refuse and contact us, and we will handle it for you as soon as possible.

Optical products are special items and cannot be returned or exchanged unless there is a quality issue with the product itself

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 0.12-60	Screen Reset Custom	Screen Reset Custom	Screen Reset 60-40
More+ Less	2-300	15-5000	0.12-60	0.12-60	Custom	Custom	60-40
Barium Fluoride Biconcave Lenses Number：PBa06- Dia(mm)：2-300 Focal Length(mm)：15-5000 Center Thickness(mm)：0.12-60 Edge Thickness(mm)：0.12-60 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′ Coating：Uncoated Clear Aperture：>90% REACH：Compliant ROHS：Compliant

Material Data
Optical Properties
Transmission Range	0.15-14μm
Transmittance	>94%@0.35nm-10.8μm
Refractive Index	1.462@2.58μm1.45@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