高出光效、小体积、非连续表面自由曲面透镜设计方法。
Using high light efficiency, small size, non-continuous surface free-form lens design method.
特点：光效高，体积小，容易使用，安全，远或近照明效果佳。
Characteristics: small size, high lighting efficiency, easy for use, safety, lighting is very good for far or close.
特点：光效高，体积小，容易使用，安全，远或近照明效果佳。
Characteristics: small size, high lighting efficiency, easy for use, safety, lighting is very good for far or close.
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