Novel method for improving design accuracy of binary CGH

The design accuracy of CGH is very important for aspheric surface testing. In order to improve the accuracy of CGH, Householder transformation is applied for wave-front fitting. Differing from direct constructing normal equation group in least square method, Householder transformation directly orthogonalizes and triangulates the matrix of inconsistent equation group. Fitting coefficient can easily be solved in the next step. The library function of MATLAB is used to design the CGH. As example, symmetry wave-front and asymmetry wave-front are fitted by using Householder transformation, relative CGH is designed. The results show that it is feasible for the wave-front fitting and CGH design.