Broadband Dielectric High-Reflectivity Mirror
High-performance broadband dielectric mirrors use multilayer dielectric films to form a highly reflective surface on an optical substrate, achieving reflectance close to 100% in a specified band. Compared with conventional metal-coated mirrors, they offer low absorption, strong thermal stability and precise phase control for laser cavities, scientific experiments, precision imaging and optical communications. They operate stably with both narrow-linewidth lasers and high-power pulsed lasers, reducing optical loss and improving system efficiency.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Substrate Material | BK7, Fused Silica, DUV-to-Infrared Materials or Custom Materials |
| Dimensions [Customizable shapes and dimensions] | 0.5 mm～500 mm( Customizable shapes and dimensions ) |
| Dimensional Tolerance | +0.0 / -0.2 mm |
| Thickness Tolerance | ±0.2 mm |
| Clear Aperture Dimension [> 90%] | Central 90% of Diameter (> 90%) |
| Surface Flatness [Per 25mm, before coating; 632.8 nm (per 25mm, before coating)] | λ/10 @632.8 nm (Per 25mm, Before Coating) |
| Surface Quality [Scratch/Dig; High Precision] | 10-5 S/D (Scratch/Dig) (High Precision) |
| Parallelism | < 3 arcmin |
| Surface Roughness | typical:< 100 Å |
| Chamfer | Protective Chamfer < 0.5 mm × 45° |
| Wavelength Options | 266 nm, 355 nm, 532 nm, 780 nm, 915 nm, 976 nm, 1064 nm, 1550 nm, etc. |
| Operating Temperature | -40°C to 80°C |
| Coating [Single Surface] | Dielectric high-reflection coating on one side, Ravg >99.5%; rear face fine-ground or polished |
| Reflectance (Optional) [Optional; Specific Wavelength; AOI = 0° or 45°] | R > 99.9% |
| Reflectance (Optional) [Optional; Ultraviolet Band] | R > 97% |
| Laser Damage Threshold [20 ns；20 Hz；1064 nm；1064 nm] | > 5 J/cm²，20 ns，20 Hz @ 1064 nm |
Datasheet
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