Silicon(Si) Double-Concave Lenses

Single crystaline silicon (Si)  is a chemically inert gas material with high hardness and insoluble in water. It has excellent light transmission properties in the 1-7 μm band, and it also has excellent light transmission properties in the far infrared band 30-300 μm, it is the  characteristic can't found in other optical infrared materials. Silicon single crystal is usually used for 3-5μm mid-wave infrared optical components. Due to the good thermal conductivity and low density of this material, it is also a common material for making laser optics.

silicon (Si) double convex lens is similar to a plano-concave lens in that the focal length is negative, but the light incident in parallel diverges outward, and has a wide range of applications in optical systems, such as lidar, optical sensors, spectrometers and other equipment, as a light path transmission or reflection device.

Our Company can provide silicon(Si) Double-Concave Lenses with diameters from 2-300mm and thicknesses from 0.12-60mm (accuracy up to 20-10, 1/10L@633nm),coating AR, BBAR, AF or upon request.

Technical parameters of Silicon(Si) Double-Concave Lens

Material properties of Silicon(Si)

Transmission curve

Silicon has high thermal conductivity and low density. Silicon is a widely used NIR material for applications in the 1.2 to 7 μm region due to its low cost and low density. Silicon is well suited for weight-sensitive applications, especially those in the 3 -5 μm range.