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单词 parfocal
释义

Definition of parfocal in English:

parfocal

adjective pɑːˈfəʊkl
Optics
  • Designating or relating to two or more lenses (especially in a microscope) the focal points of which lie in the same plane, so that they may be interchanged without the need to adjust the focus.

Origin

Late 19th century. From par + focal.

 
 

Definition of parfocal in US English:

parfocal

adjectivepɑːˈfəʊkl
Optics
  • Designating or relating to two or more lenses (especially in a microscope) the focal points of which lie in the same plane, so that they may be interchanged without the need to adjust the focus.

Origin

Late 19th century. From par + focal.

 
 
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更新时间:2026/6/2 11:47:00