The red indicator on the same side is lit when an object is detected. Closing Note To sum up then, the infrared close object alert device (simply an active infrared proximity sensor) transmits pulsed ...

Lead-salt sensors have less sensitivity (and cost less) than indium-gallium-arsenide (InGaAs) sensors, but are responsive to wider spectra: roughly 1 to 3 µm for PbS and 1 to 5 µm for PbSe.

Proximity sensors in mobile devices are sometimes used for a third function–to calculate Specific Absorption Rate (SAR), used to attenuate radio power of the device when it is in close proximity to ...

NDIR for Detecting Gas Leaks Non-dispersive infrared sensors, or NDIR, were introduced in the 1960s and have been widely used for gas-leak detection since that time (Fig. 1).

Room-temperature waveguide-integrated photodetector using bolometric effect for mid-infrared spectroscopy applications. Light: Science & Applications, 2025; 14 (1) DOI: 10.1038/s41377-025-01803-3 ...

The Defense Advanced Research Projects Agency (DARPA) has announced a new program which seeks to enable quantum-level infrared (IR) detection at room temperature. The IR spectrum is a vast information ...

The 2.5-mm IR sensor can be built into a phone or tablet next to the digital camera where it can measure a wide range of temperatures accurately enough for clinical use.