Standard metal mirror are front-surface mirror with metal coating and SiO2 or Mgf2 overcoated. The metal coating including Aluminium, sliver, HR and golden. The reflective of Al is above 85%, sliver is 97%,Golden and HR is 99%. Customer can chose the suitable coating according to the use.
Sunday Optics manufactures custom front-surface metal-coated mirrors for broadband reflection and beam steering in UV, visible, near-infrared and infrared optical systems. Available coating options include protected or enhanced aluminum, protected silver and protected gold, selected according to the operating wavelength, required reflectance, angle of incidence, polarization and working environment.
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Key Features of Our Metal-Coated Mirrors
Front-surface reflective coating helps reduce ghost reflections and unnecessary transmission losses.
Broad spectral coverage with aluminum, silver and gold coating options for UV, VIS, NIR and IR systems.
Protective SiO₂ or MgF₂ overcoats can improve resistance to oxidation, handling and environmental exposure.
Standard diameters from 2 mm to 400 mm with custom thicknesses and dimensional tolerances available.
Substrate, coating, surface quality, flatness and clear aperture can be specified according to the optical design.
Suitable for samples, prototype development and repeat production orders.
Specifications
| Diameter | 2mm to 400mm |
| Diameter Tol. | +/-0.1 |
| Material | Bk7 sapphire fused silica, ZnS2, CaF2, Si, Ge. |
| Surface Quality | 40-20 standard |
| Flatness | 1/4 lambda |
| Chamfer | 0.25mmx45degree |
| Coating | AR, HR, Silve, Aluminum. Golden. |
| Protective overcoat | SiO₂ or MgF₂, depending on wavelength and coating design |
| Custom parameters | Thickness, clear aperture, reflectance band, AOI, polarization and inspection requirements |
The final coating specification and reflectance curve are confirmed according to the required wavelength range, angle of incidence and operating environment.
Our metal-coated mirrors can be specified for:
Beam steering and optical path folding
Spectroscopy and analytical instruments
Machine vision and industrial inspection
Interferometry and optical metrology
UV detection and UV optical instruments
NIR and infrared imaging systems
Thermal sensing and FTIR instruments
Telescope, illumination and imaging assemblies
Laser alignment and beam delivery systems
For laser applications, please provide the wavelength, CW or pulsed operation, power or pulse energy, pulse duration, repetition rate and beam diameter so that coating compatibility and laser damage threshold requirements can be evaluated.
How to Select a Metallic Mirror Coating
| Coating | Uses | Selection Considerations |
|---|---|---|
| UV-Enhanced Aluminum | UV instruments and UV-to-visible optical systems | Selected when UV response is more important than maximum visible or NIR reflectance |
| Protected Aluminum | General VIS/NIR beam steering and broadband instruments | Cost-effective, broad spectral performance and comparatively good durability |
| Enhanced Aluminum | Visible imaging, inspection and illumination systems | Provides improved visible reflectance compared with standard protected aluminum |
| Protected Silver | High-throughput VIS/NIR and broadband optical systems | High broadband reflectance; humidity and environmental exposure should be considered |
| Protected Gold | NIR, MWIR and LWIR instruments | Strong IR performance and chemical stability; not recommended when visible reflectance is required |
Custom Metal-Coated Mirrors for OEM Projects
Sunday Optics supports custom optical mirrors development according to customer drawings and optical system requirements. Buyers can specify the substrate material, diameter, thickness, edge profile, surface quality, surface flatness, clear aperture, coating band, reflectance target, angle of incidence and polarization.
Our integrated capabilities cover optical design, substrate processing, coating, assembly and optical testing, helping OEM customers keep mechanical, coating and inspection requirements aligned from sample evaluation through volume production.
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