Thermal sensor with an improved coating

摘要

The disclosure is directed to an apparatus for detecting radiation having wavelengths from about 0.4 mu m to about 5.6 mu m. An optical coating is applied to a thermal sensor that is normally transparent to radiation with such wavelengths. The optical coating is thin and light and includes a modifier and an absorber. The thermal sensor can be a pyroelectric detector such as strontium barium niobate.