Method for limiting amount of radiation impinging on a radiation-sensitive
detector device by directing radiation toward the detector, permitting
the radiation to impinge upon the detector device when the radiation is
below a predetermined threshold, and utilizing radiation having
wavelengths different from signals of interest to initiate limiting of
the radiation impinging upon the detector when the predetermined
threshold is exceeded. The optical limiter includes an IR limiting layer
pair selected so that energy from visible and near infrared radiation
activates the optical limiter. The limiting layer pair may includes a
layer closer to the source of radiation of e.g. vanadium dioxide,
vanadium sesquioxide, or germanium crystal and a layer further from the
source of radiation of e.g. chalcogenide glass, germanium crystal, or
sodium chloride crystal.