Optical Windows


Product Specifications

Optical Windows



  • ES2 High Purity Sapphire (99.999%)

Crystal Quality

  • Optical Grades
  • No Grain Boundaries, Twins, Lineages, or Crack


  • Best UV Grade sapphire in the industry


  • C–Plane (0001)
  • A–Plane (11-20)
  • R–Plane (10-12)
  • M–Plane (10-10)
  • Random

Shape and Sizes

  • Round Up to 12” (300 mm)
  • Square/Rectangle Up to 250 mm Dimensions

Rod Stock Length 

  • Up to 200 mm


  • Up to 50mm +

Surface Finish 

  • Fine Grind
  • Single or Double Side Polished

Available Options 

  • Beveled and Chamfered Edges
  • Radius Corners, Custom Shapes and Features




Custom Specifications not listed above are also available


In optical applications ranging from Defense/Aerospace and Instrumentation to Medical Device and Semiconductor equipment, Rubicon’s ES2 crystal growth and manufacturing technologies provide a full range of sapphire windows of high optical quality and strength, including round windows up to 300 mm or 12 inches in diameter.

Product Specifications

Contact us to inquire about large rectangular windows.

Inquire Here