Ultra-Broadband Metallic Mirrors

Shanghai Optics is a custom optics manufacturer with over 55 years of optics manufacturing experience. We supply high precision Ultra-Broadband Metallic Mirrors according to customers’ specifications. These mirrors provide a high reflectance over a very broad spectral bandwidth. They are manufactured by coating first with a reflective metal film and then with a dielectric overcoat for protection and enhancement of the reflectivity.

Coatings offered include aluminum, silver and gold. Each has a different spectral characteristic as shown in the curves. Aluminum provides a good general purpose visible range mirror. Silver has a very high reflectance over the visible and near infra-red range and gold is the preferred coating for infra-red applications at wavelengths greater than 2 microns.

Key Features

• High reflectance over a broad spectral range
• Enhanced reflectance in the visible range
• Effective over wide angles of incidence
• Standard diameters from 12.7 to 50.4mm

Factory Standard

• Surface flatness: Lambda/4
• Diameter: +0, -0.2mm
• Surface quality: 20-10
• Parallelism: < 0.3arcmin Thickness: +0.1mm Clear aperture: >90% diameter
• Bevel: 0.2mm x 45° typical
• Material: BK7, grade A
• Laser damage threshold: 0.5J/cm2 for 10ns pulse
• Durability: to MIL-C-675

Contact us for manufacturing limit or custom specifications.

Ultra-Broadband Metallic Mirrors