fundamental paraxial equation

paraxial equation, fundamental

Equation based on gaussian theory and dealing with refraction at a spherical surface:

where n and n′ are the refractive indices of the media on each side of the spherical surface, r is the radius of curvature of the surface and l and l′ the distances of the object and the image from the surface, respectively. n/l and n′ /l′ are the vergences (or reduced vergences) of the incident and refracted light rays respectively. L′ − L corresponds to the change produced by the surface in the vergence of the light and is called the focal power (or vergence power, or refractive power) F of the surface. ThusL′ − L = FFocal power is usually expressed in dioptres and can be either positive or negative.At a reflecting surface or a mirror the equation becomesL′ − L = 2/rwhere r is the radius of curvature of the surface or mirror. Syn. general refraction formula. See image distance; object distance; sign convention; gaussian theory; vergence.

单词	fundamental paraxial equation
释义	fundamental paraxial equation paraxial equation, fundamental Equation based on gaussian theory and dealing with refraction at a spherical surface:where n and n′ are the refractive indices of the media on each side of the spherical surface, r is the radius of curvature of the surface and l and l′ the distances of the object and the image from the surface, respectively. n/l and n′ /l′ are the vergences (or reduced vergences) of the incident and refracted light rays respectively. L′ − L corresponds to the change produced by the surface in the vergence of the light and is called the focal power (or vergence power, or refractive power) F of the surface. ThusL′ − L = FFocal power is usually expressed in dioptres and can be either positive or negative.At a reflecting surface or a mirror the equation becomesL′ − L = 2/rwhere r is the radius of curvature of the surface or mirror. Syn. general refraction formula. See image distance; object distance; sign convention; gaussian theory; vergence.
随便看	right main landing gear right mainstem bronchi right main stem bronchus right margin right marginal artery right marginal branch (of right coronary artery) sphincter muscle of hepatopancreatic ampulla sphincter muscle of male urethra, external sphincter muscle of pancreatic duct sphincter muscle of pupil sphincter muscle of pylorus sphincter muscle of urethra sphincter muscle of urethra, internal sphincter muscle of urinary bladder sphincter oculi sphincter of ampulla sphincter of antrum sphincter of biliaropancreatic ampulla sphincter of (common) bile duct sphincter of common bile duct sphincter of gastric antrum sphincter of hepatic flexure of colon sphincter of hepatopancreatic ampulla sphincter of oddi sphincter of oddi dysfunction