Precision Round Optical Mirrors

Round precision mirrors are available in three different materials to meet various demanding applications where a high degree of wavefront integrity is critical. All are aluminum coated with a protective SiO overcoat. They are also available uncoated for use as windows or flats.

Target Grade — made of low expansion borosilicate glass which provides low thermal expansion, high thermal resistance, excellent light transmission and impressive chemical durability.


Interferometer Grade — made of synthetic fused silica which provides superior transmission characteristics, a high degree of purity, exceptional environmental durability, and a low coefficient of thermal expansion.

Zerodur — made of a glass-ceramic material which is thermally more stable than fused silica.


Target Grade Specifications

  • S1: Flatness specified at 633nm
  • 60/40 scratch/dig, except where noted
  • S2: Fine ground
  • Diameter: +/-1.0mm
  • Thickness: +/-1.0mm
  • Material: Low expansion borosilicate glass
  • * Standard 80/50 scratch/dig
Diameter Thickness Flatness Flatness
25.4mm 6.2mm 1/4 wave 1/10 wave
50.8mm 9.5mm 1/4 wave 1/10 wave
76.2mm 12.7mm 1/4 wave 1/10 wave
101.6mm 15.8mm 1/4 wave 1/10 wave
*152.4mm 25.4mm 1/4 wave 1/10 wave
*203.0mm 33.8mm 1/4 wave 1/10 wave

Interferometer Grade Specifications

  • S1: Flatness specified at 633nm
  • 60/40 scratch/dig
  • S2: Fine ground
  • Diameter: +/-0.5mm
  • Thickness: +/-0.5mm
  • Material: Fused silica
Diameter Thickness Flatness Flatness
25.4mm 12.7mm 1/10 wave 1/20 wave
50.8mm 15.9mm 1/10 wave 1/20 wave
76.2mm 15.9mm 1/10 wave 1/20 wave
101.6mm 19.1mm 1/10 wave 1/20 wave
127.0mm 19.1mm 1/10 wave 1/20 wave
152.4mm 25.4mm 1/10 wave 1/20 wave

Zerodur

Please call for a prompt quotation on your specifications.