Research And Implementation Of Holographic Imaging Hardware Drive System

In recent years,with the increasing demand for visual enjoyment,the consumption of related electronic devices has also increased day by day,which has greatly promoted the rapid development of near-eye display devices and related technologies.Among them are virtual reality(Virtual Reality,VR),augmented reality(Augmented Reality,AR),and naked-eye 3D(Three Dimensional)holographic technologies.However,the difficulties in hardware implementation in holographic technology,such as the response requirements for hardware drive systems and the need for linear correction of spatial light modulators,have always been difficults for researchers to actively explore.In view of the above problems,the paper studies holographic imaging hardware drive system.Based on the time-division multiplexing method,the drive control circuit is designed and the relevant hardware experiment platform is built,and the color hologram is successfully realized.First of all,this article explains the basic principles in the design of hardware drive systems,mainly the principle of space-to-sequence,and the principle of linear correction of analog and digital phases.Then,starting from the hardware,the hardware design and construction of the drive system are introduced,including: the hardware composition of the optical system,and the hardware system of the field programmable logic device(Field Programmable Gata Array,FPGA)drive board.Then is the hardware programming design of FPGA-based drive control circuit.The drive control function is divided into four modules: space to timing module,phase linearity correction module,three-color laser source control module and communication control module.Among them,the phase linearity correction module is to correct the phase modulation capability of the spatial light modulator LCo S(Liquid Crystal On Silicon).It implements the analog phase correction based on FPGA,and the phase linearity correction of further digital piecewise linear fitting is successful.The linearity of its phase modulation is improved,so that the holographic imaging effect can be improved.Finally,a board-level simulation was carried out to measure the effect of phase correction and show the difference of monochromatic holography and the effect of color holographic imaging.The innovation of this design is: through the programming design of the drive control circuit,the linear correction of the space-to-sequence and the phase is achieved,and the color path is used to make the color holographic imaging successful.The digital piecewise linear fitting correction method proposed in the linear correction of the phase improves the linearity of the phase modulation of the spatial light modulator LCo S and improves the imaging effect of the monochromatic hologram.