Plano-Parallel Plates


  • Rectangular: edge length 0.5 mm – 600 mm
  • Round: diameter 0.5 mm – 600 mm


  • 0.1 mm – 50 mm (depending on size)


  • Planarity: up to λ/10 (select ≤ 6 for diameter-to-thickness or diameter-to-greatest-edge length ratio depending on size), diameter or edge length can be measured up to 250 mm diameter. Documented proof available for up to 150 mm on request
  • Parallelism: up to 1″ depending on dimensional details or
  • Wavefront deformation up to λ/10 depending on dimensional details
  • Thickness: up to ±0.005 mm

Higher precision on request.



Hellma USA Inc.
80 Skyline Drive
11803 Plainview, NY
United States

Phone: +1 5169 3908 88


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