【摘要】 对连续位相型菲涅尔透镜的设计，采用简单的线性面形代替复杂的抛物面（二次）面形有可能降低控制面形的难度．文中分析了这两种面形的差异，通过数值模拟，发现采用线性面形时光学传递函数和点扩散函数十分接近理想函数，从而在理论上论证了这种代替的可行性．文中并提出了进一步改进的措施．更多还原

【Abstract】 This paper pointed out that, for the design of continuous phase Fresnel lens, it helps to reduce control difficulty of the fabricated profile to replace the more complex quadratic profile with simpler linear one. The difference between such two kinds of profile was analyzed in details. By computer simulation, it was found that the optics transferring function (OTF) and the point spread function (SPF) of the linear profile lens are very close to the ideal ones,which provides the theoretical demonstration. At last, the further improving approach was pointed out.更多还原