Laser detection phosphors are used to detect the presence of lasers in the infra-red region by converting the energy to visible.

Storage phosphors react to a broad spectrum of infra-red but require daylight or UV to charge up the phosphor first. Exposure to infra-red will cause the energy to be released resulting in a gradual drop in output.

“Anti-Stokes“ phosphors directly convert the energy from infra-red to visible with a continuous output. They do not exhibit the same broad response to infra-red though.