Research On Input Signal System Of Liquid Crystal Spatial Light Modulator Based On STM32

With the rapid development of information technology,people have higher requirements for the processing speed and processing capacity of information data.Liquid crystal spatial light modulator(LCSLM)is an optical device,which utilizes the photoelectric effect of liquid crystal to achieve the modulation of light field by applying electrical stimulation to liquid crystal.LCSLM is widely used in optical interconnection,optical computing,digital holography,laser and other fields,which is an effective way for high-speed data processing in the future.Currently,the input signals of LCSLMS are common video signals,such as VGA or HDMI,provided by PCS,and require local cable connections.As a result,LCSLMS are inconvenient to use.n order to reduce the hardware cost and increase the flexibility of LCSLM,a video signal transmission system based on STM32 control is proposed and designed in this thesis.The system can directly provide input signals to LCSLMS or remotely provide input signals wirelessly,facilitating the use of LCSLMS.At the same time,the system can also be used as a common wireless video transmission system for image acquisition and video surveillance.The main work content of this paper is as follows:(1)Based on the analysis of the working principle and application field of LCSLM,a video acquisition and transmission system based on embedded chip STM32 is designed to provide input signals for LCSLM;(2)Completed the system hardware design and software program writing,realized the conversion of the collected video signal into VGA signal as the input signal of LCSLM,or transmitted to LCSLM through wireless remote;(3)By building a hardware platform and using Qt software to write a wireless test host computer,the video image signal output of the system was tested,and the feasibility of the system providing input signals for LCSLM was verified.