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lensmore about lens

lens

 

  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Lens  \Lens\  (l[e^]nz),  n.;  pl  {Lenses}  (-[e^]z).  [L.  lens  a 
  lentil.  So  named  from  the  resemblance  in  shape  of  a  double 
  convex  lens  to  the  seed  of  a  lentil.  Cf  {Lentil}.]  (Opt.) 
  A  piece  of  glass,  or  other  transparent  substance,  ground  with 
  two  opposite  regular  surfaces,  either  both  curved,  or  one 
  curved  and  the  other  plane,  and  commonly  used  either  singly 
  or  combined,  in  optical  instruments,  for  changing  the 
  direction  of  rays  of  light,  and  thus  magnifying  objects,  or 
  otherwise  modifying  vision.  In  practice,  the  curved  surfaces 
  are  usually  spherical,  though  rarely  cylindrical,  or  of  some 
  other  figure.  Lenses 
 
  Note:  Of  spherical  lenses,  there  are  six  varieties,  as  shown 
  in  section  in  the  figures  herewith  given:  viz.,  a 
  plano-concave;  b  double-concave;  c  plano-convex;  d 
  double-convex;  e  converging  concavo-convex,  or 
  converging  meniscus;  f  diverging  concavo-convex,  or 
  diverging  meniscus. 
 
  {Crossed  lens}  (Opt.),  a  double-convex  lens  with  one  radius 
  equal  to  six  times  the  other 
 
  {Crystalline  lens}.  (Anat.)  See  {Eye}. 
 
  {Fresnel  lens}  (Opt.),  a  compound  lens  formed  by  placing 
  around  a  central  convex  lens  rings  of  glass  so  curved  as 
  to  have  the  same  focus;  used  especially  in  lighthouses, 
  for  concentrating  light  in  a  particular  direction;  --  so 
  called  from  the  inventor. 
 
  {Multiplying}  {lens  or  glass}  (Opt.),  a  lens  one  side  of 
  which  is  plane  and  the  other  convex,  but  made  up  of  a 
  number  of  plane  faces  inclined  to  one  another,  each  of 
  which  presents  a  separate  image  of  the  object  viewed 
  through  it  so  that  the  object  is  as  it  were  multiplied. 
 
 
  {Polyzonal  lens}.  See  {Polyzonal}. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Humor  \Hu"mor\,  n.  [OE.  humour,  OF  humor,  umor,  F.  humeur,  L. 
  humor,  umor,  moisture,  fluid,  fr  humere,  umere,  to  be  moist. 
  See  {Humid}.]  [Written  also  {humour}.] 
  1.  Moisture,  especially,  the  moisture  or  fluid  of  animal 
  bodies,  as  the  chyle,  lymph,  etc.;  as  the  humors  of  the 
  eye,  etc 
 
  Note:  The  ancient  physicians  believed  that  there  were  four 
  humors  (the  blood,  phlegm,  yellow  bile  or  choler,  and 
  black  bile  or  melancholy),  on  the  relative  proportion 
  of  which  the  temperament  and  health  depended. 
 
  2.  (Med.)  A  vitiated  or  morbid  animal  fluid,  such  as  often 
  causes  an  eruption  on  the  skin.  ``A  body  full  of  humors.'' 
  --Sir  W.  Temple. 
 
  3.  State  of  mind,  whether  habitual  or  temporary  (as  formerly 
  supposed  to  depend  on  the  character  or  combination  of  the 
  fluids  of  the  body);  disposition;  temper;  mood;  as  good 
  humor;  ill  humor. 
 
  Examine  how  your  humor  is  inclined,  And  which  the 
  ruling  passion  of  your  mind.  --Roscommon. 
 
  A  prince  of  a  pleasant  humor.  --Bacon. 
 
  I  like  not  the  humor  of  lying.  --Shak. 
 
  4.  pl  Changing  and  uncertain  states  of  mind;  caprices; 
  freaks;  vagaries;  whims. 
 
  Is  my  friend  all  perfection,  all  virtue  and 
  discretion?  Has  he  not  humors  to  be  endured? 
  --South. 
 
  5.  That  quality  of  the  imagination  which  gives  to  ideas  an 
  incongruous  or  fantastic  turn,  and  tends  to  excite 
  laughter  or  mirth  by  ludicrous  images  or  representations; 
  a  playful  fancy;  facetiousness. 
 
  For  thy  sake  I  admit  That  a  Scot  may  have  humor,  I'd 
  almost  said  wit.  --Goldsmith. 
 
  A  great  deal  of  excellent  humor  was  expended  on  the 
  perplexities  of  mine  host.  --W.  Irving. 
 
  {Aqueous  humor},  {Crystalline  humor}  or  {lens},  {Vitreous 
  humor}.  (Anat.)  See  {Eye}. 
 
  {Out  of  humor},  dissatisfied;  displeased;  in  an  unpleasant 
  frame  of  mind. 
 
  Syn:  Wit;  satire;  pleasantry;  temper;  disposition;  mood; 
  frame;  whim;  fancy;  caprice.  See  {Wit}. 
 
  From  WordNet  r  1.6  [wn]: 
 
  lens 
  n  1:  a  transparent  optical  device  used  to  converge  or  diverge 
  transmitted  light  and  to  form  images  [syn:  {lens  system}] 
  2:  genus  of  small  erect  or  climbing  herbs  with  pinnate  leaves 
  and  small  inconspicuous  white  flowers  and  small  flattened 
  pods:  lentils  [syn:  {Lens},  {genus  Lens}] 
  3:  biconvex  transparent  body  situated  behind  the  iris  in  the 
  eye;  it  focuses  light  waves  on  the  retina  [syn:  {crystalline 
  lens}] 
  4:  equipment  that  uses  a  magnetic  or  electric  field  in  order  to 
  focus  a  beam  of  electrons  [syn:  {electron  lens}]




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