For pin-cushion position sensitive detector(PSD)with S1880 type
a simulation model using finite element method is established and its dynamic response characteristic simulation is done.Thereby three dynamic response error curves with different scanning speeds of light are obtained.Some simulation conclusions show that the dynamic response errors brought by PSD increase with the increasing of scanning speed of light.When the light linearly scans symmetrical line on PSD surface with certain speed in the positive direction of x axis
the radio of maximum of dynamic response error brought by PSD is approximate equal to that of accordingly scanning speeds of light.The simulation results are valuable for the actually engineering applications of PSD with pin-cushion type.