Sodium Chloride (NaCl)

Sodium Chloride is used for CO2 laser optics and windows, lenses, and prisms where transmission to 16µm is desired. Because of its low absorption, NaCl is being used in high power laser systems. Polished surfaces must be protected from moisture by exposing to only a dry atmosphere or by using a heating element to maintain the temperature of the NaCl part above the ambient temperature.

 

Property Specification
Transmission Range 0.2µm to 20µm
Density 2.165
g/cm3
Thermal Expansion 44 x 10-6 /°C
Surface Finish Generally 60-40 or 80-50 scratch-dig in the infrared
Surface Figure Generally λ/20 @ 10.6µm
AR Coating Options Moisture Protection (Specify Wavelength of Use)
Typical
Applications
Spectroscopic accessories, CO2 lasers
Products Manufactured Windows, Lenses, Wedges, Prisms, Laser Len Protectors

 

Wavelength (µm)
Index of Refraction (n)
2.0736
1.526
4.1230
1.522
6.4825
1.513
8.0400

1.506

10.0184
1.495
12.5000
1.472
14.7330
1.454
20.5700
1.374

 

NaCl Typical Curve