Silicon Biconcave Lens PSi06-
Silicon biconcave lenses have two concave surfaces with equal curvature and are insoluble in water. It has translucency in the 1-7 μm wavelength range and also in the far-infrared wavelength range of 30-300 μm. It is used for lens beam expansion, projection, and expanding the focal length of optical systems. This type of lens can diverge light rays with a negative focal length, consisting of two concave surfaces with equal curvature. It is commonly used for beam expansion, projection, and expanding the focal length of optical systems. UM OPTICS can provide a diameter of 2-300mm and a thickness of 0.12-60mm (accuracy can reach 20-10,1)/ 10L@633nm ）A silicon biconcave lens.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Dia | 2-300 mm |
| Focal Length | 15-5000 mm |
| Center Thickness | 0.12-60 mm |
| Edge Thickness | 0.12-60 mm |
| Design Wavelength | Custom |
| Radius of Curvature | Custom |
| Surface Quality | 60-40 |
| Diameter Tolerance | +0.0/-0.1 |
| Thk Tolerance | ±0.1 mm |
| Substrate Material | Silicon（Si） |
| PV [@632.8nm] | λ/4 |
| Centering | 3 |
| Clear Aperture | >90% |
| Coating | Uncoated |
| REACH | Compliant |
| ROHS | Compliant |
| Transmission Range [Substrate Material：Silicon（Si）] | 1.2-15μm |
| Refractive Index [Substrate Material：Silicon（Si）；@10μm] | 3.41776%@10μm |
| Reflection Loss [Substrate Material：Silicon（Si）；@10μm] | 46.1%@10μm |
| Structure [Substrate Material：Silicon（Si）] | Single crystal,synthetic |
| Cleavage Planes [Substrate Material：Silicon（Si）] | <111> |
| Density [Substrate Material：Silicon（Si）] | 2.33 g/cm³ |
| Melting Point [Substrate Material：Silicon（Si）] | 1414 ℃ |
| Thermal Conductivity [Substrate Material：Silicon（Si）；@313K] | 163 @ 313K |
| Thermal Expansion [Substrate Material：Silicon（Si）；@293K] | 2.6 @ 293K |
| Knoop Hardness [Substrate Material：Silicon（Si）] | 1100 kg/mm² |
| Specific Heat Capacity [Substrate Material：Silicon（Si）] | 712.8 J/(kg×K) |
| Dielectric Constant [Substrate Material：Silicon（Si）；@f= 9.37GHz] | 13 @f= 9.37GHz |
| Young's Modulus (E) [Substrate Material：Silicon（Si）] | 130.91 GPa |
| Shear Modulus(G) [Substrate Material：Silicon（Si）] | 79.92 GPa |
| Bulk Modulus(K) [Substrate Material：Silicon（Si）] | 101.97 GPa |
| Poisson Coefficient [Substrate Material：Silicon（Si）] | 0.266 |
| Solubility [Substrate Material：Silicon（Si）] | None |
| Molecular Weight [Substrate Material：Silicon（Si）] | 28.09 g/mol |
Applications
Datasheet
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