Imaging System Based on Single Photodiode

A short wave infrared range (SWIR) imaging system using a lens, rotating substrate with applied Walsh matrices, single photodiode and a 10-bit ADC has been proposed. The possibility of using the Walsh function for encoding and restoring an optical signal is shown. A description of the design of the developed system is presented. The parameters of the structure of an encoding disk suitable for production at a circular laser recording station have been calculated. The quality of image restoration was assessed, according to which the structural similarity of the original image and the restored one is quite high, which indicates that the both images are almost identical.