Custom Convex Spherical Mirrors
Avantier manufactures custom convex spherical mirrors for imaging, beam expansion, illumination, sensing, and other precision optical systems. Mirrors can be produced to customer-defined requirements for diameter, radius of curvature, substrate, surface figure, surface quality, coating, clear aperture, and mechanical dimensions.
We support build-to-print manufacturing as well as collaborative specification development for prototypes, small production runs, and volume programs.
Key Specifications
| Parameter | Capability |
| Diameter | 5 – 500 mm（custom available） |
| Radius of curvature | 25 – 4000 mm |
| Radius tolerance | ±0.5% ～ ±2% |
| Surface figure | λ/4 @ 632.8nm（standard）；λ/10 ～ λ/20（high precision） |
| Surface quality | 40-20 scratch-dig（standard）；20-10（precision） |
| Surface roughness | < 1nm RMS（typical for polished optics） |
| Clear aperture | >90% of diameter |
| Center thickness | Custom |
| Edge thickness | Custom |
| Dimensional tolerance | ±0.1mm |
| Operating wavelength | UV ～ IR |
| Production quantity | Prototype to volume production |
Surface-figure specifications should define the test wavelength, clear aperture, and whether the requirement applies to surface error or reflected wavefront error.
Materials and Coatings
Available substrate materials include:
- BK7 Grade A optical glass
- Corning Fused Silica 7980
- UV-grade fused silica（JGS1, JGS2）
- Zerodur®（low thermal expansion）
- Copper（for high-power applications）
- Aluminum
- Custom materials upon request
Available reflective coatings include:
- Protected Aluminum（Ravg >85% @ 350–1550nm）
- Enhanced Aluminum（190–900nm）
- UV / DUV Enhanced Aluminum
- Protected Silver（highest reflectance @ 500–800nm, Ravg ~97% visible）
- Protected Gold（NIR / MWIR / LWIR）
- Bare Gold
- Broadband dielectric coatings（custom wavelength ranges）
Coating performance can be specified by wavelength range, angle of incidence, polarization, and environmental requirements.
Custom Options
Custom manufacturing options may include:- Nonstandard diameters and radii
- Custom center and edge thicknesses
- Special substrate materials
- Custom coatings
- Tight surface-figure requirements
- Noncircular geometries
- Central apertures
- Mounting features
- Special edge treatments
Quality and Inspection
Available inspection and documentation may include:- Radius measurement
- Interferometric surface-figure testing
- Surface-quality inspection
- Surface-roughness measurement
- Dimensional inspection
- Coating performance data
- Interferograms and inspection reports
Request a Quote for Custom Convex Spherical Mirrors
Please provide a drawing or the following key requirements:
- Diameter
- Radius of curvature or focal length
- Center and edge thickness
- Substrate
- Coating and wavelength range
- Surface figure
- Surface quality
- Clear aperture
- Quantity
Our optical engineering team can review incomplete specifications and assist with manufacturability.
Related Product
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