Circular Graduations

Incremental graduated discs and reticles

Available diameters

• Ø27 mm
• Ø42 mm

Material

• Selected floatglass
• Coefficient of expansion: (α≈8.5×10^-6/K)
• Glass thickness: 1.0 ±0.1 mm
• Reticles scribed and broken
• Length resp. width tolerance: ±0.1 mm
• Outbreaks on edges: ≤ 0.1 mm

Graduation

• Sputtered chrome on glass
• Line width ratio 1 : 1
• Graduation accuracy: ≤ ±2″
• Coaxiality graduation to outside diameter: 0.2 mm

Special versions

• Other glass types
• Other glass dimensions
• Antireflective coats
• Chamfered discs
• Possible impulses at Ø27 mm:
  4, 9, 10, 20, 25, 30, 40, 90, 100, 125, 150, 160, 200, 235, 250, 314, 318, 360, 400, 500, 600, 625, 635, 720, 900, 1000, 1021, 1024, 1080, 1200, 1250, 1500, 1800, 2000, 2048, 2500, 3600, 5000 (other impulses on request)
• Possible impulses at Ø42 mm:
  50, 60, 100, 120, 125, 127, 150, 180, 200, 216, 240, 250, 254, 256, 300, 314, 360, 400, 500, 512, 600, 625, 720, 750, 768, 800, 810, 900, 1000, 1024, 1200, 1250, 1270, 1280, 1440, 1500, 1800, 2000, 2048, 2400, 2500, 2600, 3000, 3500, 3600, 4000, 4096, 4302, 4685, 5000, 5400, 6000, 6350, 7200, 8192, 9000, 9144, 10000 (other impulses on request)