Researchers have used the centuries-old idea of pinhole imaging to create a high-performance mid-infrared imaging system without lenses. The new camera can capture extremely clear pictures over a ...

Records of the natural optical phenomenon of the “camera obscura” pinhole image date back as far as 500 B.C.E. Between the 16th and 19th centuries, it was commonly used as a drawing aid. Artists would ...

Scientists have developed a lens-free mid-infrared camera using a modern twist on pinhole imaging. The system uses nonlinear crystals to convert infrared light into visible, allowing standard sensors ...