Passive electro optical counter-countermeasures

New development of imaging systems implies the use of multi band wavelength, VIS and IR, for imaging enhancement and more data presenting. As lasers as countermeasures against optics are widely spread in the recent years, these systems need to be protected from damage caused by intense radiation yet the optical system has to be transparent at these wavelengths for low light power. This paper presents a non-linear, solid-state passive wideband optical protection filters (WPF). These filters have advantages over fixed spectral filters, which permanently block only specific wavelengths, the wideband filter is transparent at all wavelengths until it is hit by damaging light. We present work in continuation of our special design WPF suitable for dual- and multi- band wavelength range, including transmission and functionality performances. We demonstrate a new design transferring our WPF filter from VIS/NIR into the MW/LWIR.