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With special designed multi layer dielectric coating, the mirror reflect some wavelength
and transmission other wavelength at the same time.
Dichroic mirror can be used to splitter or conbine different wavelength.
Dichroic mirror can be also used in SHG laser system as Harmanic Separators.
Specifications:
Substrate Material: BK7 or Fused silica
Dimension: Dia.25.4 (+0/-0.2) x 6.35 (+/-0.2) mm (typically)
Flatness: λ/4 commonly, λ/10 for laser application
Surface quality: 20-10 (subatrate for laser application), 60-40 commonly
Parallelism: < 1 arc minute
Clear aperture: >85%
Protective chamfer
Front side dichroic coated
Back side AR coated for transmission wavelength
Coating example for Laser SHG 1064-->532nm application:
S1: HR R>99.5%@1064nm & HT T>90%@532nm, S2: AR R<0.25%@532nm, AOI=0deg.
S1: HR R>99.5%@532nm & HT T>90%@1064nm, S2: AR R<0.25%@1064nm, AOI=0deg.