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| Coad | 667041 | Substrate | UVFS Corning 7980 0F | |
| Type | Plane Dichroic Mirror | Clear Aperture | ≥20mm | |
| Dimension(mm) | 25.0 x 6.35 | Parallelism | <30 arcsec | |
| Diameter | 25.0mm +0/-0.1 mm | Protective Chamfer | 0.2-0.5mm x 45° | |
| Thickness | 6.35mm +0/-0.1 mm | Surface Quality S1 | 20-10 S-D per CA (following MIL-PRF-13830B standard) | |
| HR Wavelength (nm) | 2940 | Surface Quality S2 | 20-10 S-D per CA (following MIL-PRF-13830B standard) | |
| HT Wavelength (nm) | 1540 | Surface Flatness | <λ/4 @633 nm over any 15 mm aperture within CA | |
| AOI(°) | 45 | Coating Type | IBS Coating | |
| Reflectivity | >99% | Coating Parameter S1 | HRa>99% @ 2940 nm + HTa>98% @ 1540 nm + Ra = 50% +/- 20% (best effort +/- 10-15%) @ 589-594 m + 532 nm | |
| Transmittance | >98% | Coating Parameter S2 | ARa< 0.7% @ 1540 nm |
The Dichroic Mirror is a high-performance optical filter designed specifically for modern laser systems. It efficiently injects pump light into the resonator or serves as a frequency-doubling end mirror, doubling the beam frequency within the cavity. Its unique multi-layer dielectric coating structure ensures extremely high reflectivity at specific wavelengths while maintaining good transmission performance at non-target wavelengths, minimizing energy loss during laser transmission. The dichroic coating, made using Ion Beam Sputtering (IBS) technology, offers excellent density uniformity and adhesion, effectively suppressing spectral drift caused by changes in environmental temperature and humidity, achieving sharp edges and precise bandwidth cutoff characteristics.
This product achieves >99.5% reflectivity at commonly used laser wavelengths (such as 532 nm, 800 nm, 1064 nm) and maintains >90% transmission at non-working wavelengths, meeting the stringent requirements of high-power lasers, spectrometers, and high-resolution imaging systems. Additionally, the dichroic mirror excels in harmonic separation, pump light path optimization, and multi-wavelength combined experiments, providing reliable, stable, and easily integrable solutions for both research and industrial applications.
Notes: For optimal performance, it is recommended to store and use the mirror in an environment of 25 °C and relative humidity of 40%-60%. If contamination occurs on the mirror surface, gently wipe with >99% alcohol and lint-free optical tissue. Avoid using rough fabrics, water, or abrasive cleaners, as they may damage the coating.
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