K9 Glass Biconvex Lens PG205-
K9 biconvex lenses are commonly used in imaging, beam expansion or contraction, convergence and other applications to focus collimated beams or collimate point light sources. It has the characteristics of high purity, high transparency, thermal stability, and low refractive index. The design of a biconvex lens allows parallel beams of light to converge at a point, which is commonly used in laser systems to increase the degree of focus of the beam. Manufacturing requires precise machining and polishing processes to ensure its surface quality and optical performance. It 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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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 | Customizable |
| Radius of Curvature | Customizable |
| Surface Quality | 60-40 |
| Diameter Tolerance | +0.0/-0.1 |
| Thk Tolerance | ±0.1 mm |
| Substrate Material | K9 |
| PV [@632.8nm] | λ/4 |
| Centering | <3′ |
| Clear Aperture | >90% |
| Coating | Uncoated |
| REACH | Compliant with Standards |
| ROHS | Compliant with Standards |
| Transmission Range [Substrate Material：K9] | 0.35-2μm |
| Refractive Index [Substrate Material：K9；@587.5618nm] | 1.5168@587.5618nm |
| Refractive Index [Substrate Material：K9；@10.6μm] | 3×10⁻²@10.6μm |
| Reflection Loss [Substrate Material：K9；@587.5618nm(both sides)] | 8.1%@587.5618nm(both sides) |
| Density [Substrate Material：K9] | 2.51 g/cm³ |
| Melting Point [Substrate Material：K9] | 559 ℃ |
| Thermal Conductivity [Substrate Material：K9] | 1.114 W/(m•deg C) |
| Thermal Expansion [Substrate Material：K9；-30/+70 degC] | 7.1*10⁻⁶ |
| Specific Heat Capacity [Substrate Material：K9] | 0.858*10³ |
| Young's Modulus(E) [Substrate Material：K9] | 82 GPa |
| Bulk Modulus(K) [Substrate Material：K9] | 34 GPa |
| Poisson Coefficient [Substrate Material：K9] | 0.206 |
| Solubility [Substrate Material：K9] | None |
Applications
Datasheet
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Supplier Information
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