Hartmann-Shack Wavefront Detector Performance Numerical Simulation Analysis

Micro lens array whose parameters directly affect the wave front detection performance is a core component of Hartmann-Shack wave front sensor. Make a deep theoretical study on sensitivity, spatial resolution, wave front measurement error and Dynamic Range which affect the design of the wave front detector, and research the coupling relationship between micro lens array parameters and focal length by numerical simulation analyzing method. Experimental results showed that: Hartmann-Shack´ various parameters are all determined by the number of sub-lenses and the focal length of the micro lens array. Dynamic range and sensitivity are in reciprocal relationship with the focal length, the full dynamic range of the pore size became negative when the focal length increased to a certain threshold, the wave front measuring error can be reduced by higher Fresnel number, greater micro lenses number and lesser number of Zernike polynomial. It is of great significance for multiple sub-aperture detection technique to select reasonable parameters of sensor in the practical application.