Pieces Knowledge: Basic Knowledge of Optical Lens Grinding .
WEBThe main control point for grinding. 1. Check the fixed points, scars, sand, broken, frog skin, corrosion on the surface or not. 2. Check the quantity of Yasi, vertical edge, the number of the surface is under the limit or not. 3. Check the grind quantity is in the within standard or not. Middle part highWhen the lens and the original ...