Highly durable conductive coating for visible and NIR applications

The new military requirements that call for the use of eyesafe lasers for range finding capabilities on aircraft, skips, tanks, and other vehicles has put an extra burden on the transmission of conductive coatings. Originally, the window coatings have low resistivity, <7.0 ohm/square, for EMI control were required to transmit up to 1.06 micron. With the new eyesafe lasers for range finding, the requirements of near infrared transmission have been pushed toward longer wavelengths, The windows are now required to have good transmission at 1.543 microns (eyesafe laser wavelength). The traditional indium-rin oxide coating has poor transmission varying from 20% to 50% due to to free carrier absorption. A nevi conductive coating developed at HDOS has good transmission in photopic and xenon tracker regions and it has good transmission at 1.543 micron. This coating also has good environmental durability. The spectral performance, environmental durability, rain erosion resistance, acid resistance, and sand. abrasion resistance of this coating are also significant.