Being a new type of light source, LEDs (Light Emitting Diode) have been applied in more and more various fields, which resulted in a higher demand for their secondary optics design.

• 摘要LED发光二极管作为一种新型的光源，其应用范围已经越来越广泛，这也对LED应用的二次光学设计提出了更高的要求。