Silicon (Si) being one of the hardest IR material available for use between NIR/IR between 1µm to 6µm then transmission starts to decrease. Its transmission is just over 50% between the 1 to 6µm and above 50µm to over 100 µm, so antireflective coatings are advisable for improving transmission.
Silicon has a high refractive index of around 3.4 but lower than germanium. Silicon has lower density so ideal for less weighty optical designs.
Silicon is generally used as windows in the 3 to 5µm (MWIR) waveband, and also as optical filter substrates within this band as 3 to 5µm is important for the detection of sources radiating at a black body temperature of 700K, such as mortar fire or as the muzzle flash sniper rifles. Silicon also has a high thermal capacity so is a good choice for use in laser mirrors.
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Specification: |
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Diameter: |
+0/-0.2mm |
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Length, width: |
+/-0.2mm |
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Thickness: |
+/-0.2mm |
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Surface quality: |
60-40 scratch/ dig |
If you require Silicon Windows up to 12” diameter and BBAR/ DLC coated for 3-5µm.
Telephone 401 583 7846 or email to sales@surplus-optics.com
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