Silicon optical components

SINOPTIX supplies various optical components made of optical grade silicon. Silicon is a abondent element on earth with interesting optical characteristics. It is widely used as a infrared material for IR camera, sensors and lasers.

Silicon characteristics

Silicon properties chart

Material denomination Silicon
Chemical element Si
Refractive index 2.50
Transmission range 1.2µm to 8µm
Density 2.33 g/cm3
Hardness 1100 Knoop (MOHS 6.5)
Young’s modulus 130.9 GPa
Thermal expansion 2.6*10-6 °K-1
Thermal conductivity 163 W/(m*°K)
Melting point 1690 °K

Please visit our complete guide on silicon optics to know more.

Note

+ Transmission of pure Si is not very high, it is strongly advised to add Anti-reflective coating on the optics
+ Si have poor transmission between 9 and 20µm

Silicon optical components capabilities

Manufacturing capabilities

Properties Values
Available dimensions Diam 3 to D400mm
Dimensional tolerances +/-0.01mm
Thickness 1-50mm
Surface quality S&D : 60/40 normal quality; 40/20 high quality
Flatness 1/2 lambda
Parallelism better than 10″
Coatings AR / BBAR / DLC

Silicon components references :

Available Si components

We can propose below kinds of optical components :

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