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- Lagrange_invariant abstract "In optics the Lagrange invariant is a measure of the light propagating through an optical system. It is defined by,where y and u are the marginal ray height and angle respectively, and ȳ and ū are the chief ray height and angle. n is the ambient refractive index. In order to reduce confusion with other quantities, the symbol Ж may be used in place of H. Ж2 is proportional to the throughput of the optical system (related to étendue). For a given optical system, the Lagrange invariant is a constant throughout all space, that is, it is invariant upon refraction and transfer.The optical invariant is a generalization of the Lagrange invariant which is formed using the ray heights and angles of any two rays. For these rays, the optical invariant is a constant throughout all space.".
- Lagrange_invariant wikiPageID "14595008".
- Lagrange_invariant wikiPageRevisionID "561326591".
- Lagrange_invariant hasPhotoCollection Lagrange_invariant.
- Lagrange_invariant subject Category:Geometrical_optics.
- Lagrange_invariant type BodyPart105220461.
- Lagrange_invariant type Eye105311054.
- Lagrange_invariant type GeometricalOptics.
- Lagrange_invariant type Organ105297523.
- Lagrange_invariant type Part109385911.
- Lagrange_invariant type PhysicalEntity100001930.
- Lagrange_invariant type SenseOrgan105299178.
- Lagrange_invariant type Thing100002452.
- Lagrange_invariant comment "In optics the Lagrange invariant is a measure of the light propagating through an optical system. It is defined by,where y and u are the marginal ray height and angle respectively, and ȳ and ū are the chief ray height and angle. n is the ambient refractive index. In order to reduce confusion with other quantities, the symbol Ж may be used in place of H. Ж2 is proportional to the throughput of the optical system (related to étendue).".
- Lagrange_invariant label "Invariant de Lagrange-Helmholtz".
- Lagrange_invariant label "Lagrange invariant".
- Lagrange_invariant sameAs Invariant_de_Lagrange-Helmholtz.
- Lagrange_invariant sameAs m.03d8zsn.
- Lagrange_invariant sameAs Q6402620.
- Lagrange_invariant sameAs Q6402620.
- Lagrange_invariant sameAs Lagrange_invariant.
- Lagrange_invariant wasDerivedFrom Lagrange_invariant?oldid=561326591.
- Lagrange_invariant isPrimaryTopicOf Lagrange_invariant.