There are many approaches to realize laser energy uniform. This paper presents a new method based on"variable step sampling" to design a optical system including aspheric lens.

The computational fluid dynamics (CFD) analysis of air-flow generating duct were utilized for sampling scheme given by uniform design to collect the train dataset.

The results of sampling taken from in-situ of the model test show that constructing model by this design method is available; and the density and property of the model material are uniform and stable.