ZnS or Zinc Sulphide crystals grown by chemical vapor desposition (or CVD) exhibits exceptional fracture strength and hardness leading to its frequent choice for military applications or other harsh environments. This material is often used in the LWIR 7 to 14 microns region of thermal imaging. Its high resistance to rain erosion and high-speed dust and particulate abrasion makes it particularly suitable for exterior IR windows on aircraft frames.
Hangzhou Shalom EO provides the ZnS windows of IR grade and Cleartran or multi-spectrum grade materials, the AR/AR coating is made to increase the transmission of the windows.
Item #1| Specifications | |
| Materials | CVD ZnS crystals, IR grade or Cleartran grade |
| Diameter Range | ~ 250mm |
| Aperture | >90% |
| Dimension tolerance | +0.0/-0.2mm |
| Thickness tolerance | +/-0.2mm |
| Surface Quality | 60/40 S/D |
| Parallelism | 1 arc minute |
| Chamfer | 0.3-0.5mmx45degree |
| Coating | AR/AR coating@7-14μm |
Material: ZnS optical grade
Type: circular plane window
Diameter: 12.7 mm (+0.0/-0.1 mm)
Thickness: 1.5 mm (+0.0/-0.1 mm )
Surface quality: 60-40 scr-dig
Clear aperture: ≥ 90% of diameter
Two holes diameter: 1 mm (+/-0.05 mm) each, 9 mm apart
Coating: both faces AR at 4-7 microns (1400-2400 cm^(-1))
Item #2
Material: ZnS optical grade
Type: circular plane window
Diameter: 12.7 mm (+0.0/-0.1 mm)
Thickness: 1 mm (+0.0/-0.1 mm)
Surface quality: 60-40 scr-dig
Clear aperture: ≥ 90% of diameter
Two holes diameter: 1 mm (+/-0.05 mm)
Coating: both faces AR at 4-7 microns (1400-2400 cm^(-1))
Item #3
Material: ZnS optical grade
Type: circular plane window
Diameter: 11.98 mm (+0.0/-0.1 mm)
Thickness: 2 mm (+0.0/-0.1 mm)
Surface quality: 60-40 scr-dig
Clear aperture: ≥ 90% of diameter
Coating: both faces AR at 4-7 microns (1400-2400 cm^(-1))
Item #4
Material: ZnS optical grade
Type: circular plane window
Diameter: 11.98 mm (+0.0/-0.1 mm)
Thickness: 2 mm (+0.0/-0.1 mm)
Surface quality: 60-40 scr-dig
Clear aperture: ≥ 90% of diameter
Coating: none
