Whenever light passes from one medium into another medium with different optical properties, most notably refractive index, part of the light is reflected and part of the light is transmitted. The intensity ratio of the reflected and refracted components is a function mainly of the difference in refractive index among the materials, the polarization of the incident light and the angle incidence.
According to Fresnel's law, it is convenient to think of incident radiation as the superposition of two plane-polarized beams, p-polarized which electric field paralled to plane of incidence and s-polarized which electric field perpendicular to the plane of incidence. Frenel? laws can be summarized the following two equation:
When reflected and refracted rays are perpendicular to each othere(q1+q2= 90), the reflected light is completely s-polarized. This angle is called Brewster's angle.
1.AR Coating
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R0<1.5%@540nm
R<2%@400-700nm
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Single Layer MgF2 AR Coatings |
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R0<0.25%@1064nm |
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Multilayer AR Coating |
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R<0.5%@450~650nm
R<1.0%@420~700nm
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Broadband AR Coating |
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R0<0.1%@1064nm
R0<0.5%@532nm
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DBAR Coatings |
2.PR Coating
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R= 50.0%±5.0%@450-700nm |
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Broadband PR Coatings |
3.Beamsplitter Coating
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RS>99.5%@632.8nm
RP<5.0%@632.8nm
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HIgh Power Laser Line Polarization Beamsplitter Coatings |
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RS>99.0%@450~650nm
RP<5.0%@450-650nm
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Broadband Polarization Beamsplitter Coatings |
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R>99.5%@1064nm
R<15%@532nm
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Dichroic Beamsplitters Mirrors |
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R>99.5%@532nm
R<10%@1064nm
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Dichroic Beamsplitters Mirrors |
4.Laser Components Coating
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R<0.1%@1064nm
R<0.5%@532nm
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AR/AR@1064&532nm |
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R>99.8%@1064nm
R<5.0%@532nm
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HR@1064&HT@532nm |
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R0<0.1%@1064nm |
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AR@1064nm |
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R>99.8%@1064nm
R>99.0%@532nm
R<5.0%@808nm
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HR@1064&532nm, HT@808nm |
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R>99.8%@1064nm
R<5.0%@808nm
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HR@1064 & HT@808nm |
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R>99.8%@1064nm
R<5.0%@532nm
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HR@1064 & HT@532nm |
5.HR Coatng
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R0>99.8%@1064nm |
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Dielectric High Reflective Coatings |
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Ravg>95%@450~12000nm (Protected -Silver)
Ravg>98%@2000~12000nm (Enhanced -Au) |
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Ravg>87%@200~1200nm (Protected -Al)
Ravg>93%@200~1200nm (Enhanced -Al)
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Metallic High Reflective Coatings |
