In infrared photography, the film or image sensor used within a digital camera is sensitive to infrared lighting, which allows the camera to pick up any light that's invisible to the human eye.

在红外线摄影中，数码相机上使用的胶片传感器或图像传感器对红外光感光，能让相机拾取人眼不可见的任何光线。

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Hot areas glow orange in infrared light, revealing the active fire front on the south and west sides of the burned area. (the orange horizontal stripes are satellite sensor artifacts.)

红外线领域为橙色，主要活跃在燃烧区域的南面和西面(橙色横纹为人造的卫星传感器)。

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The M1031-W also includes an integrated passive infrared sensor for motion detection, a white LED light, and two-way audio support with a built-in microphone and speaker.

M1031-W还包括一个适合移动侦测的集成被动红外传感器，白色LED灯，和支持内置麦克风和扬声器的双向音频。

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When nearly 30 years ago Dr. Jacob Fraden invented an ear thermometer working on this second principle, the infrared light sensor was so large that he needed a narrow gold-plated reflective tube to channel the light from the ear drum to the sensor.

FORBES: Body temperature.

It works by combining a 3D sensor with a projector that emits an invisible, infrared light in a complex pattern.

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It also uses an accelerometer and light sensors to snap an image when a person enters a new environment, and an infrared sensor to take one when it detects the body heat of a person in front of the wearer.

FORBES: Your Own Big Data Lookin' at You