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.