Germanium Aspherical Lens

Germanium aspherical lens is an optical component with a transmission spectrum range of 2-12 μ m. It is a very commonly used infrared optical material with high hardness, good thermal conductivity, and insoluble in water. Commonly used include parabolic mirror, hyperbolic mirror, ellipsoidal mirror, etc. In optical systems, it can effectively correct various aberrations, improve imaging quality, and enhance system discrimination ability. It can replace multiple spherical parts with one or several non spherical parts, thereby simplifying instrument structure, reducing costs, and effectively reducing instrument weight. 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.

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	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
Germanium Aspherical Lens Number：PAsGe- 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：Germanium（Ge） PV@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant

Material Data
Optical Properties
Transmission Range	2-15μm
Reflection Loss	4.0028@10.6μm
Absorption Coefficienet	1.3×10-3@3.8μm 3×10-2@10.6μm
Structure	Cubic Crystal System
Cleavage Planes	<111>
Physical Properties
Density [g/cm3]	5.33
Melting Point [℃]	936
Thermal Conductivity [W/(m×K)]	58.61 @ 293K
Thermal Expansion [10-6/K]	6.1 @ 298K
Knoop Hardness [kg/mm2]	780
Specific Heat Capacity [J/(kg×K)]	310
Dielectric Constant	16.6 @9.37 GHz
Young's Modulus (E) [GPa]	102.7
Shear Modulus(G) [GPa]	67
Bulk Modulus(K) [GPa]	77.2
Poisson Coefficient	0.28
Chemical Properties
Solubility / g/L	Inoluble
Molecular Weight / g/mol	72.61