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apochromatic

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apochromatic


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Apochromatic  \Ap`o*chro*mat"ic\,  a.  [Pref.  apo-  +  chromatic.] 
  (Optics) 
  Free  from  chromatic  and  spherical  aberration;  --  said  esp.  of 
  a  lens  in  which  rays  of  three  or  more  colors  are  brought  to 
  the  same  focus,  the  degree  of  achromatism  thus  obtained  being 
  more  complete  than  where  two  rays  only  are  thus  focused,  as 
  in  the  ordinary  achromatic  objective.  --  {Ap`o*chro"ma*tism}, 
  n. 
 
  From  WordNet  r  1.6  [wn]: 
 
  apochromatic 
  adj  :  (optics)  corrected  for  both  chromatic  and  spherical 
  aberration;  "an  apochromatic  lens" 




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