• selected floatglass, scribed and broken
• planarity 10 µm/100 x 100 mm
• coefficient of expansion 9 µm/°C/m
• glass thickness for scale 2,0 +0/-0,2 mm
• glass thickness for mask 1,0 ±0,1 mm
• max. length of glass 3300 mm
• outbreaks on edges < 0,1 mm

• sputtered chrome on glass
• transmission < 0,3% at 400 - 900 nm
• reflexion > 60% at 400 - 900 nm
• gratings 10 : 10 µm, 20 : 20 µm
• line width ratio 1 : 1
• max. line tolerance ±10%
• graduation accuracy < ±3 µm per 1000 mm
• parallelism graduation to glass edge < 0,3 mm per 1000 mm
• max. track length 3150 mm

• pinholes < dia Ø 250 µm or several smaller defects whose total area does not exceed this
• dots < dia Ø 180 µm or several smaller defects whose total area does not exceed this
• defects visible to the naked eye on the illuminated table are not critical
• max. 3 defects per 1000 mm
• minimum distance between two defects 40 mm

• dots < Ø 0,3 mm
• max. 6 defects per 1000 mm
        
   

• other glass types
• other glass thicknesses
• other coatings
• sliding coat on mask
• other gratings

• selected floatglass, unpolished
• planarity 10 µm/100 x 100 mm
• coefficient of expansion 9 µm/°C/m
• width of glass 8 mm +0/-0,2 mm
• glass thickness 0,9 ±0,1 mm

• line width ratio 1 : 1
• max. line tolerance ±10 %
• sputtered chrome
• transmission < 0,3 % at 400 - 900 nm
• reflexion > 60% at 400 - 900 nm

100 : 100 µm

5 or 10 µm/m 

100, 180, 260, 340, 420, 500, 740, 980, 1160
(other lengths on request) 

connection scale to aluminium profile with rubber cord

+5 V ±5%, max. 100 mA 

square wave signals from built-in Subdiving Electronics times 1 

directly to suitable NC or DRO