Research on high-speed transmission and display technology of optical dynamic scene

The optical scene generator is used to generate the optical characteristics of real scenes and is an important means to test the optical imaging system. With the continuous improvement of the performance of optical imaging system, optical scene generator needs to generate optical scene with high frame rate and high resolution, which puts forward higher requirements for the transmission and display rate of scene. In order to meet the requirement of performance test, this paper proposes a transmission and display link of high-speed data transmission and dynamic scene display through digital micromirror device (DMD) based on Windows operating system platform. In terms of data transmission, the relationship between the scene resolution ratio and memory buffer is analyzed. By adjusting the size of send and receive buffer and window, the data transmission rate is increased by 32.82 times. Combined with multithreading technology, the transmission rate of 10 Gigabit network is stabilized at 8.8Gbps. In data receiving, length counting method is used to avoid the problems of packet sticking and packet splitting in TCP/IP. On the DMD display side, the total display rate was doubled by using USB3.0 port transmission, ping-pong buffer technology and binary pulse-width modulation technology. The experimental results show that the whole link transmission rate of the high-speed transmission and display system proposed in this paper reaches 395.5MB/s. It can realize the transmission and display of 8-bit gray scene with frame rate of 200Hz, resolution of 1920 × 1080.