Surface quality: 60-40 g?w2J6Z.`J  
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The surface marked R1 is conic surface (aspheric surface) with folowing equation: l7!U),x%/U  
Y^2=2 R1_0 X - (1- e^2) X^2 where  R1_0 = -10.700B0.010  &  e^2 = 0.060B0.003 ',L{CQA?c  
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The surface marked R2 is conic surface (aspheric surface) with folowing equation:
N)9pz?*V  
Y^2=2 R2_0 X - (1- e^2) X^2 where  R2_0 = 13.698B0.013  &  e^2 = 0.106B0.003 Y]D7i?3N  
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還有下面這個圖 <Gb