| kendall |
2017-08-11 11:48 |
Sorry, my PC cannot type chinese now, crazy. {yB&xj[z #R.-KUW: I saw some Japanese engineers use "primary differential and second differential" to define the extended freeform optical surface tolerance. HLZ;8/|48m I guess it define some vatied range for each coefficients but I don't know Japanese words. LkK~%tY Still cannot know how to do that.
|
|