Different material

來源: TBz 於 2005-01-24 15:44:19 [] [舊帖] [給我悄悄話] 閱讀數 : (403 bytes)

The lense in China is made of optical glass. In USA, everybody is driving, and every car is equipped with airbags. So for safety reason, all the lenses are actually made of special kind of plastic. The index of the plastic is not the same as that of optical glass. This makes the normal plastic lense pretty thick. Even the high index lense is still thick compared to the optical glass.


所有跟帖： 

• You are wrong -gotoweb- ♀ 給 gotoweb 發送悄悄話 (0 bytes) () 01/24/2005 postreply 18:19:46

• I bought plastic lense in Chin -gotoweb- ♀ 給 gotoweb 發送悄悄話 (419 bytes) () 01/24/2005 postreply 18:25:23

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