Crystals such as sodium chloride, potassium bromide and potassium chloride are uniform, bright and high transmittance within 0.250-20 μm when thickness less than 10mm, and no impurity absorption. These single crystals are idea materials for making optical elements for prisms, lenses, filters, and various pool and laser windows in infrared devices and optical instruments.
| Main performance parameters | |
| Crystal | NaCl |
| Crystal Structure | Cubic |
| Growth method | Czochralski |
| Melting point | 801 ℃ |
| Lattice constant | a=5.642Å |
| Density | 2.16（g/cm3） |
| Transmission Band | 0.25-22.00 μm |
| Refractivity | 1.54427 |
| Transmissivity | 90% @ 0.25-20 μm |
| S/D | 80/50 |
| Roughness | ≤ 30nm |
| Hygroscopy | water-soluble crystal, which is easily tidal, and cannot be chemically polished, |
| Orientation | <100>,<110>,<111>. |
| Orientation tolerance | ±0.5-2° |
| Dimension | 10×10mm、20*20mm.Dia50.8mm Can be processed according to the customer needs |
| Thickness | 0.5-5 mm Can be processed according to the customer needs |
| Polishing | One side or two sides |
| Packing | Class 100 clean bag, Class 1000 clean room |
