Concave mirrors

Concave Spherical Mirrors

Controlled light collection and focusing with concave geometry

Introduction

Concave spherical mirrors are reflective optical components with an inward-curved spherical surface that converges incident light toward a focal region. Their rotationally symmetric geometry provides predictable focusing behavior and makes them a practical solution for collecting, concentrating, and redirecting light without introducing chromatic aberration.

Compared with more complex aspheric mirror designs, spherical concave mirrors offer a simpler optical geometry that is well suited to systems where moderate focusing performance, ease of alignment, and straightforward integration are important. Their focal characteristics are primarily determined by the surface radius of curvature and mirror geometry.

Applications

  • Light collection systems
  • Illumination focusing systems
  • Spectroscopy collection optics

Features & advantages

  • Efficient collection and concentration of incident light
  • Achromatic focusing across broad wavelength ranges
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Product specifications

Specification Options
Mirror Type Concave spherical mirror
Substrate N-BK7 / fused Silica / custom options
Diameter (mm) 5 – 300
Thickness (mm) 5 – 25
Effective Focal Length (EFL) Custom options available
Focal Length Tolerance ±2% typical
Clear Aperture >90% typical
Wavelength Range UV / Visible / NIR / IR, coating dependent
Surface Quality 60/40 S/D typical
Surface Flatness λ/2 – λ/10 @ 632.8 nm
Coating Metallic (Al / Ag / Au), dielectric coatings

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

Technical capabilities & processing options

  • Radius of Curvature Control:
    Precision surface generation and polishing support controlled spherical curvature for consistent focal behavior across custom mirror designs.
  • Focal Length Control:
    Mirror geometry can be tailored according to the required focal distance and optical layout while maintaining consistent spherical surface performance.
  • Spherical Surface Figure:
    Controlled polishing and metrology help maintain the required surface figure and reflected wavefront quality for focusing applications.
  • Metrology and Inspection:
    Radius of curvature, surface figure, surface quality, dimensions, and coating performance can be verified according to project requirements.

Need a Custom Concave Spherical Mirror?

Share your diameter, radius of curvature or focal length, wavelength range, and coating requirements. Our team can review optical specifications and focusing requirements for your project.

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