Mirrors

WindowsMaterialRefractive IndexTransmission Range(µm)Thermal Expansion Coefficient(10-6/K)BK71.5164 588nm330-2100nm7.5Fused Silica1.4858 308nm185-2500nm0.58Silicon3.426 5000nm1200-7000nm2.55Germanium4.003 10000nm2000-14000nm5.5MgF2­no=1.3836(405nm) ne=1.3957(405nm)120-7000nm13.7||a; 8.48||cCaF21.399 5000nm170-7800nm18.85Sapphire1.755 1000nm180-4500nm8.4 Lens We can provide all kinds of spherical and cylindrical lenses that made of different materials such as fused silica, sapphire, CaF 2 and MgF 2 as standard. Other material or specification are available upon requirementSpherical: plano-convex, plano-concave, double-convex, double-concave, meniscus Cylindrical: plano-convex, plano-concave Mirrors Specifications: Dielectric Laser MirrorMaterialBK7, UV grade Fused SilicaDimension Tolerance0 -0.2mmThickness Tolerance±0.2mmSurface Flatnessλ/10 632.8nm per 25mm rangeSurface Quality60/40(after coating)Clear Aperture>90%CoatingDielectric HR coating on one surface, R>99.7% for random polarization, rear surface uncoatedDamage Threshold>10J/cm2, 20ns, 20Hz, 1064nmSpherical MirrorMaterialBK7, UV grade Fused SilicaDimension Tolerance0 -0.2mmThickness Tolerance±0.2mmSurface Flatnessλ/4 632.8nm per 25mm rangeCentration<3 arc minutesSurface Quality60/40 (after coating)Clear Aperture>90%CoatingDielectric HR coating on one surface, rear surface uncoatedDamage ThresholdDielectric: >10J/cm2, 20ns, 20Hz, @1064nmCouplerMaterialBK7Dimension Tolerance0 -0.2mmThickness Tolerance±0.2mmSurface Flatnessλ/8 632.8nm per 25mm rangeWedge<3 arc minutesSurface Quality20/10Clear Aperture>90%CoatingS1: Partial reflective coating, R±2%, AOI 0 deg S2: AR coating, AOI 0 degDamage Threshold>10J/cm2, 20ns, 20Hz, @1064nm We can also provide various coatings for laser optics upon customer request.