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Sodium Chloride(NaCl) window
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Sodium Chloride(NaCl) optical window |
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Material |
Single crystal of Sodium Chloride(NaCl), High Purity >99.99% |
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Other Names |
Sodium Chloride window, NaCl window |
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Crystal structure |
Cubic |
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Applicable wave band |
0.25μm ~ 16μm |
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Refractive Index |
1.49065 at 10.6μm |
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Melting Point |
801℃ |
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Density |
2.17g / cc |
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Absorption coefficient |
7×10-6 cm -1 at 1.06μm |
| Thermal Conductivity |
1.25 W m-1 K-1 at 273K |
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Knoop hardness |
18.2 in <100> |
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Dielectric constant |
5.9 at 1MHz |
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Thermal expansion coefficient |
44×10-6 /℃ |
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Maximum size |
Diameter 100mm (Single crystal) |
| Material | Standard Size | Surface quality |
| Sodium Chloride(NaCl) window |
φ12.7mm x 3.0mm φ25.4mm x 3.0mm φ25mm x 5.0mm φ50mm x 5.0mm φ50.8mm x 5.0mm 10 x 10 x 1.0mm 12.7 x 12.7 x 3.0mm 25.4 x 25.4 x 3.0mm |
Polishing: Double side optical-polished or Epi-polished Roughness: Ra<30nm or Ra<10nm
Size Tolerance: +/-0.1mm
Thickness Tolerance: +/-0.1mm or +/-0.05mm
Parallelism: 1 minute, 30 seconds, 5 seconds or higher
Surface Finish: 80-50, 60-40 (scratch-dig)
Surface Figure: 1/2λ, 1/4λ or higher
Chamfer: 0.25mm × 45°
Coating: Upon requirments |
Sodium chloride (NaCl) crystal is a material commonly used in FTIR spectroscopy. It is also a relatively low cost cubic crystal material with excellent transmission between 250nm-16μm. In such a large transmission range, the refractive index is between 1.4-1.6. Sodium chloride windows are sensitive to thermal shock, but can be used at temperatures up to 400 °C. Its density is 2.17 g/cm3 and Knoop hardness is 18.2. It is hygroscopic, so the substrate must not contain any moisture. NaCl window is one of the most useful materials in general-purpose spectral windows and applications that have no significant effect on moisture sensitivity.
We can customize different size and thickness of Sodium Chloride(NaCl) optical window upon requirements, such as Sodium Chloride(NaCl) round wafer, Square substrate and Cylinder, or Punch holes and other shapes.
Contact Us
- BIOTAIN CRYSTAL CO., LIMITED
- Tel: (+86) 1506 0796 451
- Fax: (+86) 0597 2212602
- Email: sales@crystal-material.com
- Work Time ( GMT +8 ):
- 9 AM ~ 6 PM, Monday to Friday
- Main office: A7, No. 501, Denggaoxi Road, Xipi street, Xinluo District, Longyan, Fujian, China
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