Spectrum filter for transmitting in 0.45μm～1.6μm and reflecting in 8μm～12μm

Spectrum splitting filter is a key element for imaging spectrum technique. Based on the high reflection feature of the metal film and induced transmission theory, a novel element transmitting in 0.45m～1.6m and reflecting in 8m～12m was introduced. The deposition materials and the film design were presented. By using JGP560A2 magnetron-sputter deposited device, the element was produced and its optical characteristics were tested. Its average transmission ratio is more than 80% in 0.45m～1.6m, and average reflection ratio is more than 91% in 8m～12m.