High-Energy Nd:YAG Laser Harmonic Beamsplitters
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Catalog excerpts

O p t i c s 599 Email: [email protected] • Web: newport.com WINDOWS BEAMSPLITTERS OPTICAL FILTERS POLARIZATION OPTICS DIFFRACTION GRATINGS HIGH-ENERGY OPTICS ULTRAFAST LASER OPTICS ACCESSORIES High-Energy Nd:YAG Laser Harmonic Beamsplitters Specifications Material UV grade fused silica Wavefront Distortion ë/4 at 632.8 nm over the clear aperture Surface Flatness S1 ë/10 at 632.8 nm over the clear aperture Surface Flatness, S2 ë/5 at 632.8 nm over the clear aperture Clear Aperture > central 80% of diameter Surface Quality 10-5 scratch-dig Diameter (mm) 25.4 +0/-0.25 Thickness (mm) 6.35 ±0.5 Wedge (arc min) 3 Chamfers 0.25-0.76 mm face width x 45° ±15° Angle of Incidence 45° Reflectivity Rs <0.3 % Durability MIL-M-13508, MIL-C-675C, MIL-C-14806 Cleaning Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended (see page 622) Damage Threshold 5 MW/cm2 CW, 5 J/cm2 with 0.1–100 nsec pulses at 1064 nm, typical 2.5 MW/cm2 CW, 2.5 J/cm2 with 0.1–100 nsec pulses at 532 nm, typical Note: Reflection and transmission at wavelengths other than the specified harmonic wavelengths are uncontrolled and can vary significantly from the curve shown. Use of harmonic beamsplitters outside the design wavelengths is not recommended. Ordering Information Model Reflected Wavelength (nm) Transmitted Wavelength (nm) Reflectivity per Surface Transmission Diameter (mm) 10QM20HB.12 1064 532 Ravg >99.5% Ts >80% 25.4 10QM20HB.21 632 1064 Ravg >99.5% Ts >85% 25.4 • High damage threshold • Select fused silica • Low wavefront distortion • Hard refractory coatings Transmission (%) Reflected Wavelength Transmitted Wavelength 45¡ S Ts Min. Typical 100 80 60 40 20 0 HB.xx S1 S2 6.35 ø 25.4 ø 20.3 PERFORMA™-i Series Optical Mounts page 657 HVM-1i Industrial Optical Mount page 659

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