Flat Mirrors

Round Flat Mirrors

Custom plane surface reflection for reliable beam control

Introduction

Round flat mirrors are planar optical mirrors with a circular geometry, designed to redirect light without introducing intentional focusing power. Their flat reflective surface changes the direction of an incident beam while preserving the beam geometry, making them suitable for beam steering, optical path folding, and alignment within precision optical systems.

The circular form provides a practical solution for optical assemblies using round mounts, apertures, or rotationally symmetric mechanical layouts. Round flat mirrors can be produced in different diameters, substrate materials, surface accuracies, and reflective coating configurations to support wavelength-specific and system-level optical requirements.

Applications

  • Optical testing systems
  • Imaging path folding assemblies
  • Interferometers systems

Features & advantages

  • Low reflected-wavefront distortion for precision optical systems
  • Convenient integration with standard circular optical mounts
  • Stable beam geometry in non-focusing optical layouts
Image to be added

Product specifications

Specification Options
Mirror Type Round flat mirror
Substrate Optical glass, fused silica
Diameter (mm) 5 – 200
Thickness (mm) Custom options available
Diameter Tolerance (mm) +0.00 / -0.20 typical
Clear Aperture >90% typical
Wavelength Range UV / Visible / NIR / IR, coating dependent
Surface Quality 60/40 S/D– 20/10 S/D available
Surface Flatness λ/2 – λ/10 @ 632.8 nm
Coating Metallic (Al / Ag / Au), dielectric coatings

Specifications represent typical capabilities for flat mirror. Final parameters are confirmed according to specific optical and coating requirements.

Technical capabilities & processing options

  • Precision Flat Surface Processing:
    Controlled polishing supports high surface flatness and consistent reflected wavefront performance for precision optical applications.
  • Round Geometry and Edge Control:
    Diameter, thickness, edge profile, and clear aperture can be controlled to support reliable mounting and alignment within optical assemblies.
  • Reflective Coating Options:
    Metallic and dielectric coatings can be selected according to wavelength range, reflectivity requirements, angle of incidence, and environmental conditions.
  • Metrology and Inspection:
    Surface flatness, surface quality, dimensions, and coating performance can be inspected to verify critical optical and mechanical characteristics.

Need a Custom Round Flat Mirror?

Share your diameter, thickness, wavelength range, flatness, and coating requirements. Our team can review optical specifications and coating options for your custom round flat mirror.

Discuss your requirements
Scroll to Top