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)