Electrophysics' Infrared Sensitive Phosphor Cards offer users of infrared optical devices an easy way to locate laser beams and estimate beamsize, trouble-shoot areas and test infrared emitting devices. The intensity of the glow is in accordance with the intensity of the infrared illumination. Several models of Infrared Sensitive Cards are available.
Selection depends on the spectral range and sensitivity required.
Note that these cards normally require less incident power density when used in a darkened environment as compared to a well-lit environment. When the beam is broken in an active sensor security system, an alarm is triggered. Without proper alignment, false intrusion alarms could result. Because near-infrared beams are invisible to the naked eye, a means of locating the beam is often required to align it with an infrared detector. This is best done by placing the card at the emitter so that the beam impinges on the card's active phosphor surface.