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	regiments regiments of the new order regiments of the new type regimes regimes of granular flow regime switching jump diffusion regime-switching space-time regime type regime types regimiento regiminal regin regina regina alpine race team regina and district labour council regina anti-poverty ministry regina association of middle eastern dance regina business systems, inc. regina community basketball association regina delta blues association regina dominican high school regina duplicate bridge club regina east zone youth soccer association regina food for learning regina guild of folk arts