Precision Optics

Harris has been fabricating large optical surfaces – both mirrors and windows – in any shape, with low surface roughness and figure, for over 50 years. Harris specializes in custom fabrication of large optics in quantity while meeting demanding quality and delivery requirements. Our products are used in a variety of high-performance systems.


  • Gauging Systems
  • Grating Substrates
  • High-Energy Laser Optics
  • Inspection Instruments
  • Interferometers
  • Large Vacuum Compatible Viewing Windows
  • Microlithography Systems
  • Observation Windows
  • Relay Mirrors
  • Solid Plano Optics
  • Telescopes
  • Test Optics

Key Capabilities

  • Shape and grind plano surfaces on optics up to 100 inches (2.5m) in diameter – both solid and lightweight configurations. Complex part geometries can be machined with our computer numerical control (CNC) waterjet cutter or CNC milling systems
  • Polish plano configurations in glass, glass ceramic and crystaline materials in 10- to 50-inch (0.25 to 1.25m) diameter optics with a figure accuracy better than 0.02 wave rms (0.01 microns rms)
  • Achieve surface finishes of less than 2 angstroms on glass and glass ceramic materials
  • Meet demanding requirements for spatial frequency errors, mounting needs and other application-specific issues
  • Use specialized test systems:
    • Ritchey-Common test facility for full aperture testing of optics up to 72 inches (1.8m) in diameter
    • 35-inch (0.9m) aperture Fizeau interferometer system.
    • Capability phase measuring interferometers up to 24" (0.6 m) aperture
  • Incorporate state-of-the-art computer controlled figuring systems, such as small-tool polishing and ion figuring