Hardware Corner'

摘要

Infrared (IR) PhotoOptic devices are used for sensing and control in a variety of general market applications. These devices - LEDs and phototransistors - operating in the near IR region (700 nm to 1400 nm) are often used as a simpler and lower cost solution when compared to RF devices, since light is less complex than RF when implemented as the signal source. Optical sensors are used in industrial, consumer and other applications for sensing movement, position, proximity, ambient light, speed, and direction. Typical applications for IR sensors include: 1. Security - movement/motion detection, fire alarms/smoke detectors 2. Industrial (including automotive) - measurement, counters, motor encoders 3. Medical — blood/oxygen/temperature measurement 4. Consumer - TVs/STBs, proximity sensors, cell phones, tilt sensors, ATMs/kiosks, and cameras 5. Computers - keyboards/mice 6. Printers — paper/media/door detection