CF Lens and Protective Window 
 
The optional CF lens allows the measurement of very small objects. 
The minimum spot size depends on the used sensing head. The 
distance is always measured from the front edge of the CF lens 
holder or laminar air purge collar. The installation on the sensing 
head will be done by turning the CF lens until end stop. To combine 
it with the 2WhsLT model please use the version with external 
thread M12x1. 
 
Versions Overview: 
 
ACCTCF  CF lens for installation on sensing head [LT/ 2WLT] 
ACCTCFHT  CF lens for installation on sensing head [2W2M] 
ACCTCFE  CF lens with external thread for installation in massive housing [LT/ 2WLT] 
ACCTCFHTE  CF lens with external thread for installation in massive housing [2W2M] 
 
For protection of the sensing head optics a protective window is available. The mechanical dimensions are 
equal to the CF lens. It is available in the following versions: 
 
ACCTPW  Protective window for installation on sensing head [LT/ 2WLT] 
ACCTPWHT  Protective window for installation on sensing head [2W2M] 
ACCTPWE  Protective window with external thread for installation 
    in massive housing [LT/ 2WLT] 
ACCTPWHTE  Protective window with external thread for installation 
    in massive housing [2W2M]