Research On MTF Digital Simulation Technology In Photoelectric Imaging System

The MTF digital simulation technology is one of the most important topics in the field of optoelectronic imaging,and it is also one of the important contents in the field of imaging technology.The optimization method of photoelectric imaging system MTF simulation is accurate and effective not only can be used to explore the imaging system,and can replace the spend a lot of manpower and material resources of the experiment,save money and shorten the design cycle.In this paper,the simulation theory of photoelectric imaging system based on MTF digital simulation system,the system transfer function by modulation(MTF)modeling method of imaging system of optical system unit,CCD detector and the electronic circuit unit for mathematical modeling and simulation.MTF modeling method in this paper based on the design of wavelength and imaging system given the pupil diameter,focal length,aperture shape and optical system parameters such as the sampling frequency detector,based on the frequency-domain analysis of the background of the target in the frequency domain,space angle is calculated with different MTF values,and then through the simulation of the convolution theorem of Fourier transform for MTF imaging system.Based on the above method to build the platform of photoelectric imaging system MTF simulation software in the given imaging system parameters,imaging simulation of different target background input,and by calculating the root mean square error of standardization,information entropy,PSNR,similarity and correlation of simulation evaluation index,and contrast imaging system simulation MTF curve and MTF curve of the actual imaging equipment,to verify the reasonableness of the simulation results.Through the analysis of the simulation evaluation index and MTF curve,it is found that the error between the simulation results and the real MTF of the system is within a reasonable range,which verifies the correctness of the MTF simulation method of the photoelectric imaging system designed in this paper.