Fused Silica Optics Co.,LTD
Fused Silica Optics Co.,Ltd
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Optical Grade Infrared Silicon(Si) Windows Optics
Silicon is commonly used as substrate material for infrared reflectors and windows in the 1.5 - 8 micron region. The strong absorption band at 9 microns makes it unsuitable for CO2 laser transmission applications, but it is frequently used for laser mirrors because of its high thermal conductivity and low density. Silicon is also useful as a transmitter in the 20 micron range.
Specification
| Diameter | +0/-0.10mm |
| Length | +/-0.2mm |
| Chamfer | 0.20+/-0.10mm @ 45° |
| Surface Figure (power/irregularity) at 0.63µm | 1.0 fringe/0.5 fringe |
| Parallelism | < 40 arc Seconds |
| Perpendicularity | < 5 arc min |
| Surface Quality | 40/20Scratch/Dig |
Main Properties:
| Crystal Class | Cubic |
| Lattice Parameter | a=5.43Å |
| Melting Point | 1417℃ |
| Mohs Hardness | 7 |
| Transmission Band | 1.5-8um |
| Density | 2.329g/cm3 |
| Young’s Modulus | 130.91 GPa @40℃ |
| Thermal Conductivity | 1.63W/cm/K |
| Specific Heat | 0.18cal/g/K @25℃ |
| Thermal Expansion | 2.6x10-6/℃ @20℃ |
