Scientists create high-speed coding system

Physorg  January 23, 2018
Researchers in Russia have proposed and demonstrated a scheme for optical encoding of information based on the formation of wave fronts that works with spatially incoherent illumination. They used a liquid-crystal phase light modulator as the encoding element, where pre-synthesized diffraction optical elements are displayed. The camera’s image sensor detects the optical convolution of the image that is produced by the amplitude modulator with the pulse response of the diffractive element, derived on the phase modulator. They successfully encoded and decoded the images of QR codes with a size up to 129×129 elements. The percentage of erroneously decoded pixels didn’t exceed 0.05 percent. This scheme is effective in creating highly secure, high-speed coding systems… read more. TECHNICAL ARTICLE