Wollaston, α-BBO
 
        
          
										
										
									
                                
                              
      
  
Reference number: OSE-WPPB-06-14SN
They are prisms for splitting the incident beam into two linearly polarized beams with orthogonal polarization direction. α-BBO crystal type can be used in the ultraviolet range.
 
           
           
           
          