In geometry, confocal means having the same foci.

  • For an optical cavity consisting of two mirrors, confocal means that they share their foci. If they are identical mirrors, their radius of curvature, Rmirror, equals L, where L is the distance between the mirrors.
  • In optics, it means that one focus or image point of one lens is the same as one focus of the next lens.

See also

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  • Confocal — Con*fo cal, a. (Math.) Having the same foci; as, confocal quadrics. [1913 Webster] …   The Collaborative International Dictionary of English

  • confocal — adj. m. TECH Microscope confocal: microscope à balayage laser permettant de réaliser des coupes optiques dans l épaisseur d un échantillon sans le couper, les images ainsi produites étant ensuite traitées par un ordinateur pour aboutir à une… …   Encyclopédie Universelle

  • Confocal — (v. lat.), was einen gemeinschaftlichen Brennpunkt hat, so confocale Linien …   Pierer's Universal-Lexikon

  • Confocal — Confocal, lat., Linien mit gemeinschaftlichem Brennpunkt …   Herders Conversations-Lexikon

  • confocal — [kän fō′kəl] adj. Math. having the same focus or focuses …   English World dictionary

  • confocal — adjective Date: 1867 having the same foci < confocal ellipses > < confocal lenses > • confocally adverb …   New Collegiate Dictionary

  • confocal — See c. microscope. * * * con·fo·cal ( )kän fō kəl adj having the same foci <confocal lenses> con·fo·cal·ly kə lē adv * * * con·fo·cal (kon foґkəl) having the same focus …   Medical dictionary

  • confocal — (ˈ)kän+ adjective Etymology: com + focal mathematics : having the same real or imaginary foci used of conic sections and of conicoids whose principal sections are confocal conics …   Useful english dictionary

  • confocal — /kon foh keuhl/, adj. Math. having the same focus or foci. [1865 70; CON + FOCAL] * * * …   Universalium

  • confocal — adjective Having the same foci …   Wiktionary

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