kendall |
2017-08-11 11:48 |
Sorry, my PC cannot type chinese now, crazy. DG/<#SCF kj@m5`G I saw some Japanese engineers use "primary differential and second differential" to define the extended freeform optical surface tolerance. 6Z!OD(/e I guess it define some vatied range for each coefficients but I don't know Japanese words. @O| lA Still cannot know how to do that.
|
|