Material
Glass - Selected float glass
Shape of reticle - Plate, disc
Reticle proccessing - scribed and broken
Outbreaks on edges - <0.1 mm
Pattern
On glass - Sputtered chrome
Graduation line's width tolerance - Max. 10%
Graduation accuracy - < 2"(ø200 mm), 15"(ø20 mm)
Graduation coaxiality to outside diameter - < 0.2 mm (DIN7184)