Fused Silica(UVFS) Double-Concave Lenses
Fused silica is the amorphous (glassy) state of silicon oxide (quartz, silica). It is a typical glass with a long-range disordered atomic structure. It provides its high service temperature and low coefficient of thermal expansion by cross-linking its three-dimensional structure
Fused silica double concave lens is similar to a plano-concave lens in that the focal length is negative, but the light incident in parallel diverges outward.It’s been widely applied for laser systems and infrared systems, such as telescope, microscope,laser device and ladar Ect.
Our Company can provide fused silica 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 fused silica Double-Concave Lens
Diameter | 2-300mm |
Focal length | 15-5000mm |
Thicknesses | 0.12-60mm |
Dimension tolerance | +0/-0.1mm |
Thickness tolerance | ±0.1mm |
Surface quality (scratch & dig) | 60-40, 40-20, or better |
Surface accuracy | λ/2, λ/4 or better |
Parallelism | 3' ,30'' |
Bevel | 0.1~0.3mm x 45 degree |
Clear aperture | >85%,>90% |
Coating | AR coating or cutom |
Material properties of fused silica
Optical Properties | |
Transmission Range | 0.18-2.1μm |
Refractive index@0.5876μm | 1.4585 |
Physical Properties | |
Density[g/cm3] | 2.21 |
Melting Point[deg C] | 1900 |
ThermalConductivity[W/(m×deg C)] | 1.35 |
Thermal Expansion [deg C-1 ] | 4.0*10-6 |
Specific Heat Capacity[J/(Kg*deg C ] | 0.728*10-3 |
Young's Modulus[GPa] | 7.36 |
Shear Modulus[GPa] | 3.14 |
Poisson Coefficient | 0.17 |
Chemical Properties | |
Solubility | Insoluble |
Transmission curve
Fused silica is commonly used in applications ranging from ultraviolet (UV) to near-infrared (NIR), and its high transmittance, good heat resistance, and excellent environmental durability make it suitable for use in laser equipment, emission and detection protection equipment, and imaging systems in the ultraviolet spectrum.
