MRC measurement in target of different contrast can't accurately describe the principle of light path. This device is huge and difficult to do exploratory research. According to the basic principles of obtaining different contrast targets, a new method of getting target is designed. The method of obtaining different contrast is simulated by TracePro in Windows, and the simulation results are analyzed. The structure of system is studied. The relationship between the various modules is analyzed. The simulation shows that the device of obtaining different contrast target is feasibility. By comparing with the results of practical measurement, the method is effectiveness. We can achieve the purpose of the device improving in TracePro.
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