Silicon Plano-concave Lens

A silicon plano-concave lens is composed of a plane and a concave spherical surface, which can generate negative spherical aberration. It is commonly used in systems to expand light beams or increase focal length to balance the deviation of other lenses. Micron optics can provide a diameter of 2-300mm and a thickness of 0.12-60mm (accuracy can reach 20-10,1)/ 10L@633nm ）Silicon plano concave lens, 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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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 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
Silicon Plano Concave Lenses Number：PSi04- 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：Fused Silica PV@632.8nm：λ/4 Centering：<3′ Clear Aperture：90% Coating：Uncoated REACH：Compliant ROHS：Compliant

Material Data
Optical Properties
Transmission Range	1.2-15μm
Refractive Index	3.41776%@10μm
Reflection Loss	46.1%@10μm
Structure	Single crystal,synthetic
Cleavage Planes	<111>
Physical Properties
Density [g/cm3]	2.33
Melting Point [℃]	1414
Thermal Conductivity [W/(m×K)]	163 @ 313K
Thermal Expansion [10-6/K]	2.6 @ 293K
Knoop Hardness [kg/mm2]	1100
Specific Heat Capacity [J/(kg×K)]	712.8
Dielectric Constant	13 @f= 9.37GHz
Young's Modulus (E) [GPa]	130.91
Shear Modulus(G) [GPa]	79.92
Bulk Modulus(K) [GPa]	101.97
Poisson Coefficient	0.266
Chemical Properties
Solubility / g/L	None
Molecular Weight / g/mol	28.09