If you know the red, green, and blue components of the light that correspond to maximum reflectance, then you know the color of the object. Their sensor uses a four-lead RGB LED, but we suppose a ...
Researchers at the Columbia University School of Engineering and Applied Science have invented ‘all-optical’ nanoscale sensors of force that change intensity or color when you push or pull on ...
Researchers have developed a new optical sensor that provides a simple way to achieve real-time detection of extremely low ...