Metallic Hollow Roof Prism Mirrors, 450nm-20.0μm

Metallic Hollow Roof Prism Mirrors, 450nm-20.0μm

Tuniu’s hollow retroreflector consists of two right-angle prisms mounted on a rectangular substrate. The hypotenuse surfaces are coated with protected silver, and the two prisms form a precise dihedral angle of 90° ± 10 arcseconds. This assembly reflects beams incident on the prism surfaces; when light is normal to the edge formed by the two hypotenuses, it produces a 180° retroreflection. The prism features protected silver coating with a silicon dioxide dielectric layer to inhibit oxidation.

While this coating safeguards the silver film, the component is not intended for high-temperature or high-humidity environments, as harsh conditions may degrade the protective layer and cause oxidation. The broadband coating delivers exceptional reflectivity across infrared, visible, and near-infrared spectra: average reflectance exceeds 97.5% from 450 nm to 2000 nm and greater than 96% from 2 μm to 20 μm. With low intrinsic group delay dispersion (GDD) over its operating range, it is ideally suited for beam steering in femtosecond laser systems.

Note: The metallic coating is sensitive to prolonged air exposure, high humidity, and corrosive fumes, which may cause oxidation and performance degradation. This product is considered a consumable item. To ensure performance and service life, please adhere to the following guidelines:

• Maintain a clean and dry environment during handling and operation.
• Wear gloves to avoid direct contact with optical surfaces.
• Prevent physical damage such as scratches or abrasions, which accelerate oxidation and delamination.
• When not in use, store the component sealed in its protective case.

Tuniu offers hollow retroreflectors in three standard sizes. Custom options for dimensions, substrates, and coating types are available upon request.

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