The invention of tiny devices capable of precisely controlling the direction and behavior of light is essential to the ...

Researchers have built a paper-thin chip that converts infrared light into visible light and directs it precisely, all without mechanical motion. The design overcomes a long-standing efficiency-versus ...

Former Xinjiang government engineer Nureli Abliz, who saw firsthand how surveillance technology flagged thousands of people in China for detention, even when they had committed no crime, is ...

The Dragon Dome LED SFH 4783 uses a focused beam high-power infrared LED (IRED) to achieve a range of more than 100 m for security surveillance. It measures 11 x 6 x 5.7-mm and does not need an ...

The BBA-4000 is a solar powered wireless infrared break beam system that is simple to install and requires no wiring. The break beam sensors are powered by lithium ion batteries that are recharged ...

When you unlock a phone, step into view of a security camera or drive past a license plate reader at night, beams of infrared light - invisible to the naked eye — shine onto the unique contours of ...